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  • Artikel  (247.228)
  • Springer  (241.382)
  • International Union of Crystallography (IUCr)  (5.846)
  • 1970-1974  (181.876)
  • 1950-1954  (36.112)
  • 1935-1939  (29.240)
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  • 1
    Digitale Medien
    Digitale Medien
    X-ray determination of polarity sense by anomalous scattering at an absorption edge (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 27-32 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: A technique is described for the determination of crystallographic polarity which is generally applicable to large polar crystals containing an element heavier than K. It is an extension and simplification of Cole & Stemple's method in which the intensities diffracted by (00 l) and (00\overline l) planes are compared at wavelengths close to an absorption edge of a constituent element. A definitive polarity determination may now be made without previously measuring or assuming values of Δf′ and Δf′′ at the edge.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889870005599
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  • 2
    Digitale Medien
    Digitale Medien
    Centring equipment for X-ray diffractometers and X-ray cameras used with monochromators (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 101-102 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889870099983
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  • 3
    Digitale Medien
    Digitale Medien
    X-ray diffraction method for measurement of elastic strain (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 110-112 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: A method is suggested, using diffraction line displacements, to facilitate simultaneous determination of one-dimensional strain in a particular direction in the surface of a polycrystalline material and of the lattice parameter corresponding to the unstressed state. A single exposure at perpendicular incidence of the primary X-ray beam enables both values to be obtained. Full advantage is taken of the ratios of diffraction ring diameters.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889870005782
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  • 4
    Digitale Medien
    Digitale Medien
    A computer program for X-ray line broadening analysis (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 120-123 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: A computer program has been written for the evaluation of the size of coherently diffracting domains, microstrains, and stacking fault probabilities for f.c.c. and h.c.p. single crystals. After correcting for instrumental effects, the Warren–Averbach analysis is applied to reflections which are not affected by stacking faults. The fault-broadened peaks are then analyzed and the results plotted.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889870005800
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  • 5
    Digitale Medien
    Digitale Medien
    Comparison of two methods for calculating slit-length collimation corrections in small angle X-ray scattering (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 137-145 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: The methods of Lake [Acta Cryst. (1967) 23, 191] and Schmidt [Acta Cryst. (1965) 19, 938] for calculating slit-length collimation corrections in small angle X-ray scattering have been compared in a number of tests. The tests showed that under most conditions neither method introduces errors larger than the expected uncertainty in present-day scattering data and that slit-length corrections are relatively insensitive to small changes or errors in the weighting function. Neither method is extremely sensitive to random errors in the measured intensity but the effect of these errors is somewhat smaller with Schmidt's method than with Lake's. Three cases were found in which one of the correction methods should be avoided or used with caution: with Schmidt's method errors are produced in the outer part of the scattering curve if the angular increment is too large – a criterion has been developed for determining acceptable increments; if Lake's method is used in an angular region in which a scattering curve has subsidiary maxima or minima, more iterations may be necessary than are required for monotonically decreasing scattering curves; the usual form of Lake's method, which was developed to converge rapidly with curves which have a zero-angle maximum, was sometimes found to give appreciable errors for curves with a pronounced minimum at zero scattering angle. When the latter type of curve is corrected by this method, precautions should be taken to ensure that the collimation correction is not introducing errors.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889870005824
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  • 6
    Digitale Medien
    Digitale Medien
    On refinement of the crystal orientation matrix and lattice constants with diffractometer data. II (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 179-180 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: A modification of the refinement procedure proposed by Shoemaker & Bassi [Acta Cryst. (1970). A26, 97] is described in which the correction to the unitary orientation matrix, valid to second order in the small rotational adjustment, is applied after constraints due to crystal symmetry (which is presumably lost owing to measurement errors) have been applied to the lattice constants, and in such a way as to preserve (to second order) the unitary character of that matrix.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889870005897
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  • 7
    Digitale Medien
    Digitale Medien
    The construction of atomic projections by computer (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 185-187 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: Two computer programs, for use with an Elliot 803 machine, are described. These programs enable atomic projections from any crystal system, other than the triclinic, to be constructed in a relatively short time.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889870005939
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  • 8
    Digitale Medien
    Digitale Medien
    Correction for the satellite group in the variance method of profile analysis (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 157-164 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: Three methods are described of eliminating the influence of the satellite group in the variance method of X-ray line profile analysis. The first is to interpolate the line profile under the satellite group: however, the satellite group must be reasonably well distinguished from the α1 tail and from the background. The second method is to correct the experimental variance-range curve by a graphical construction: this assumes that the satellite lines and the broadening function are Cauchy in form. The third method is to compute the necessary corrections to the slope and intercept of the linear variance-range function by using model spectral distributions with and without the satellite group. The first two methods are applied to profiles from powders of iron and iron alloys studied with iron radiation, the third method uses an analytical model of the spectral distribution of the iron Kα multiplet. The corrections given by these methods to be made to the slope and the intercept of the variance-range function are nearly constant for all but the smallest amounts of particle-size broadening. It is also shown that particle sizes determined either from slope or intercept of the variance will be underestimated if correction is not made for the satellite group.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S002188987000585X
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  • 9
    Digitale Medien
    Digitale Medien
    Fan texture of the compound Ba3Co2Fe24O41 prealigned in a magnetic field (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 243-250 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: Samples of the ferrimagnetic material Ba3Co2Fe24O41, pre-aligned in a magnetic field and sintered at various temperatures, have been examined for preferred orientation. Schulz's reflection technique and the standardizing method of Holland were used to determine quantitative pole figures of several lattice planes. The texture bears a close resemblance to a `fan texture' in which the crystallites have their basal planes parallel to a preferred direction. The sharpness of the texture increases with increasing sintering temperature. At 1320°C an exaggerated grain growth takes place. Inhomogeneity of the magnetic field throughout the sample results in local differences in orientation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889870006131
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  • 10
    Digitale Medien
    Digitale Medien
    Separation of the α1-α2 doublet in X-ray diffraction profiles (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 272-277 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: A procedure involving the use of Fourier coefficients is suggested for the separation of the el component from an experimental diffraction profile. In contrast to the well known Rachinger method, the procedure described here does not require experimental data at any predetermined intervals. Furthermore, the separation error, if any, is evenly distributed. As in the Rachinger method, prior knowledge of the α1−α2 angular separation and the ratio R = Iα2(max)/Iα1(max) is assumed. If, however, R is unknown, then the mathematical analysis can be extended to determine the value of R.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889870006179
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  • 11
    Digitale Medien
    Digitale Medien
    Inter-Congress Meetings - I.U.Cr. Sponsorship (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 284-284 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889870006222
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  • 12
    Digitale Medien
    Digitale Medien
    Practical optical crystallogaphy by N. H. Hartshorne and A. Stuart (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 288-288 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889870006295
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  • 13
    Digitale Medien
    Digitale Medien
    Short-range order in a gold–40.0 atomic per cent palladium alloy (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 297-305 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: The local atomic arrangements in an Au-40 at.% Pd alloy were investigated by measuring the X-ray diffuse scattering from a single crystal. A computer simulation of the short-range structure was used in the interpretation of the diffuse scattering results. The interpretation indicated a tendency toward the formation of a tetragonal AB long period superlattice which has not previously been observed to occur. The static displacements of the atoms from their average positions were shown to be very small in this alloy.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889870006337
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  • 14
    Digitale Medien
    Digitale Medien
    Correction of integrated X-ray intensities for preferred orientation in cubic powders (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 313-318 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: A method is presented for correction of integrated X-ray intensities for preferred orientation in cubic powders. It is based upon examination of the polar axis density distribution, which describes the orientation of crystallites in the specimen, and upon the use of a cubic harmonic expansion in its representation. The method was tested on four specimens of aluminium, which showed different degrees of preferred orientation. The (111), (200) and (220) lattice plane normal distributions of the specimens were determined by measurement of the integrated intensities for various polar angles. Cylindrical symmetry was effected with a specimen spinner. The corrections to the Bragg reflections were derived from the orientation distribution obtained; they ranged from 0.5 to 12%. The final values were in agreement, to the extent of 1% or less, with those of a specimen in which the orientation distribution was random within the limits of experimental error.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889870006350
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  • 15
    Digitale Medien
    Digitale Medien
    The simultaneous determination of the Burgers vectors of dislocations in twin related or coincidence site related crystals (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 342-348 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: A simple and rapid procedure for orientating electron diffraction patterns required for the simultaneous determination of the Burgers vectors of dislocations in twin related or coincidence site related crystals is described. The determination of the Burgers vectors of dislocations in twin related zinc crystals is used as an example of the procedure. The procedure is applicable to all crystal structures and is based on the detailed analysis of the rotations about the optical axis and goniometer tilt stage axis of an electron microscope required to produce desired diffraction patterns from the two crystals of interest. The analysis also illustrates the way in which the tensor notation may be used in elementary vector algebra applied to lattice geometry.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889870006398
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  • 16
    Digitale Medien
    Digitale Medien
    X-ray scattering effects of ionic size in solid solutions KCl–KBr (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 385-388 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: The diffuse X-ray scattering from single crystals of 36:64 and 50:50 KCl–KBr solid solutions has been studied. The analysis of the results, which follows the method described by Borie, is based on the approximation of a solid solution Cl−–Br−. The observed values of the distortion constant for the chloride ion are 2–3 times greater than those calculated on the basis of the conventional values of ionic radii.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889870006465
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  • 17
    Digitale Medien
    Digitale Medien
    Structure types of potassium and rubidium molybdate and tungstate at elevated temperatures (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 389-392 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: The isomorphisms and the transition points of K2MoO4, K2WO4, RbMoO4 and Rb2WO4 were studied and the cell constants of the occurring phases computed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889870006477
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  • 18
    Digitale Medien
    Digitale Medien
    Orientation of microcrystals for X-ray diffraction studies (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 400-403 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: A method is described for obtaining X-ray diffraction photographs, equivalent to those obtained under single-crystal rotation conditions, from materials available only in the form of fine microcrystalline powders of acicular or platy habit. The technique involves dispersing the crystalline powder in an appropriate thermoplastic polymer followed by streaming orientation of the particles in an extrusion process. The particles are held in their new positions by solidification of the polymer melt. With acicular powders, and using a polyethylene matrix, the orientation is improved by cold drawing. The oriented composite is immediately ready for X-ray studies.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889870006519
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  • 19
    Digitale Medien
    Digitale Medien
    Correlation of measured and theoretically calculated microstrains in deformed f.c.c. metals (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 407-409 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: A correlation is presented between the root-mean-square strain as measured for cold-worked f.c.c. metals and that calculated from anisotropic dislocation theory.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889870006544
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  • 20
    Digitale Medien
    Digitale Medien
    Crystal growth and dimorphism of lithium iodate LiIO3 (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 417-417 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: Single crystals of hexagonal LiIO3 and its new tetragonal modification were grown in an aqueous solution using the evaporation method under almost identical growing conditions. The hexagonal crystal changed irreversibly to the tetragonal one at about 255°C. The latter belonged to the point group 4/m. The lattice constants were a = 9.73 and c = 6.15 Å.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889870006593
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  • 21
    Digitale Medien
    Digitale Medien
    A method of enclosing highly deliquescent or subliming specimens for X-ray single-crystal data collection (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 422-422 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889870006635
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  • 22
    Digitale Medien
    Digitale Medien
    Calendar of Events (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 425-425 
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    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889870006684
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  • 23
    Digitale Medien
    Digitale Medien
    International Tables for X-ray Crystallography (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 423-423 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889870006957
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  • 24
    Digitale Medien
    Digitale Medien
    Notes and News (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 424-424 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889870006659
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  • 25
    Digitale Medien
    Digitale Medien
    The temperature dependence of ordering in magnesium ferrite (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 496-503 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: Cation ordering in magnesium and nickel ferrites was studied by X-ray diffraction measurements carried out at the temperature of equilibration and also on quenched specimens. The order parameters on quenched specimens agreed with results previously reported by others but not with values measured at temperature. Previous results on quenched specimens had been described by a simple mass action relation with constant ordering energy. The new results on equilibrated specimens require a modified Bragg–Williams-type relation in which the ordering energy varies with the degree of order. Both ferrites are inverted when in equilibrium at low temperature. Magnesium ferrite approaches a random distribution at high temperature with a Curie point at about 1070°C. Oxygen positional parameters were 0.243±0.001 for both ferrites at room temperature. The lattice parameter of nickel ferrite quenched from temperatures up to 1255°C was 8.3295±0.0001 Å. For magnesium ferrite the lattice parameter varied from 8.3775±0.0001 Å, when quenched from 784°C. to 8.3848, when quenched from 1271°C.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889870006751
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  • 26
    Digitale Medien
    Digitale Medien
    High-speed X-ray diffraction photography (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 409-410 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: The speed of the conventional process of X-ray diffraction photography can be greatly improved by the use of a new industrial X-ray film and a fluorescent screen. This process produces a transparent film with about a tenfold decrease in exposure time and at a cost less than that of standard nonscreen film.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889870006568
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  • 27
    Digitale Medien
    Digitale Medien
    \def\lambdabar{\ifvmode\noindent\fi{\hbox{$\lambda$}\kern-0.35em\raise0.7ex\hbox{-}\kern0.2em}}\lambdabar" Phase in Ti–30% V alloy (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 413-417 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: The lattice type of the co phase in Ti–30%V alloy was determined with the X-ray precession method. Plane-net patterns of reciprocal lattice levels, normal to [110], [100], and [111] directions of the β phase, indicate that the ω phase has a b.c.c. structure with a lattice parameter three times that of the β phase.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889870006581
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  • 28
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    Digitale Medien
    Computerized gnomonic projection chart for determining orientations of single crystals from Kossel patterns (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 419-421 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: The increasing use of the electron microprobe analyser in research laboratories in recent years renewed the interest in the Kossel line method. Since it is possible to obtain diffraction patterns from selected areas – smaller than 5 microns diameter – this technique has been applied to measure the grain orientation in polycrystalline materials. Comparing the different published methods of interpreting the Kossel patterns, it has been found more convenient to use a digital computer with a peripheral graph plotter to obtain charts.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889870006611
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  • 29
    Digitale Medien
    Digitale Medien
    Alexey Vasilyevich Shubnikov, 1887-1970 (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 551-552 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S002188987000691X
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  • 30
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    Digitale Medien
    A comparison between the variances of the Cu Kα and Fe Kα spectral distributions (1971)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 4 (1971), S. 43-50 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: The variance of the X-ray spectral distribution in the Cu Kα multiplet has been redetermined with improved accuracy and over a wider range than previously. This investigation is parallel to that of Edwards & Toman on iron radiation, with which comparison is made on the following points: (i) the effect of using a β-filter and (ii) the effect of interpolating the line profile under the Kα satellite group. Both definitions of the variance are considered and three linear regions can generally be distinguished in the variance–range function. The choice of definition and the usefulness of the different linear regions in any practical application are also discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889871006216
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  • 31
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    Digitale Medien
    Absorption correction: a simple least-squares method for the determination of the geometry of the shape of a crystal (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 542-543 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: For accurate absorption-correction calculations, a precise knowledge of the crystal shape is essential. A least-squares determination of the coordinates of the crystal apices according to the analytical expressions derived is obtained by taking a series of silhouette photographs of the crystal directly on an X-ray diffractometer with a pinhole in the incident beam and using soft continuous X-radiation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889870006830
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  • 32
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    Digitale Medien
    The display of twinning in lithium niobate X-ray diffraction topography (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 546-547 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: Ferroelectric domains in lithium niobate are equivalent to inversion twins and can be displayed in X-ray diffraction topographs using the phenomenon of anomalous dispersion of X-rays.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889870006866
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  • 33
    Digitale Medien
    Digitale Medien
    The thermal expansion of titanium, vanadium and niobium monoxides (1971)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 4 (1971), S. 103-109 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: At the stoichiometric 1 : 1 ratio of atoms, the cubic NaCl-type monoxides TiO, VO and NbO have a large number of vacant sites on both the metal and oxygen sublattices. X-ray determinations of the thermal expansions of these materials show quite distinct differences. At 298 °K, the coefficients of linear expansion defined as α = (1/a)(da/dT) are as follows: (TiO)0.856(\square)0.144, α = 6.6 (7) x 10−6; (VO)0.848(\square)0.152, α = 9.3 (6) x 10−6; (NbO)0.750(\square)0.250, α = 4.8 (0) x 10−6. Progressive filling of the vacancies in titanium monoxide merely shifts the expansion curves parallel to each other in the direction of higher lattice parameters.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889871006447
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  • 34
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    Digitale Medien
    The double-crystal X-ray spectrometer: corrections, errors, and alignment procedure (1971)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 4 (1971), S. 130-138 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: The theory of the X-ray double-crystal spectrometer is outlined. For a vertical rotation axis, crystal planes should be vertical and the X-ray beam horizontal. Geometrical errors are introduced by crystal tilts (departure from vertical) and misalignment (departure of central ray from horizontal). Even with perfect alignment a vertical divergence correction is required. A typographical error in Schwarzschild's analysis of these geometrical effects led to erroneous results by Schnopper, later corrected in an erratum. The physical significance of this revision is considered here. The resulting expression for relative wavelength error indicates that, for zero tilt, misalignment produces no significant errors in relative wavelengths. Geometrical errors are shown to be negligible in recent measurements of Bearden and very small in earlier work of Bearden & Shaw. The Williams vertical divergence correction, used by Bearden, is proven valid; the Parratt form, preferred by Schnopper, is incorrect. An alignment procedure which can reduce geometrical errors below 1 part per million is described. It employs a precision engineer's level (with autocollimating telescope) and a simple technique for grinding crystal faces parallel to atomic planes.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889871006484
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  • 35
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    Digitale Medien
    Application of Ru-filtered monochomatic Ag Kα2 to X-ray topographic study (1971)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 4 (1971), S. 146-151 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: Several applications of X-ray topography with Ru-filtered Ag Kα2 radiation are described. Two of these are variations of the Lang method combined with a Ru filter. The first one is to improve the Lang traverse pattern from a specimen crystal including locally highly distorted regions such as inclusions, as demonstrated for a pure iron crystal. The second is to obtain a traverse pattern from the whole area on the same topograph for a specimen including appreciably misoriented parts, by making the first slit wider than usual. This example has been shown for a Ge crystal. Another application is concerned with taking a topograph of an area as wide as of the order of the length of a line focus, in a shorter exposure time, with high resolution. Examples have been shown for Ge and Si crystals.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889871006502
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  • 36
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    Digitale Medien
    An X-ray safety window for the Philips PW1081 radiation protection device (1971)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 4 (1971), S. 87-87 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889871099928
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  • 37
    Digitale Medien
    Digitale Medien
    Notes and News (1971)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 4 (1971), S. 89-90 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889871006344
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  • 38
    Digitale Medien
    Digitale Medien
    Crystallographers (1971)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 4 (1971), S. 90-90 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889871006356
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  • 39
    Digitale Medien
    Digitale Medien
    X-ray study of primary long chain alkylammonium halides (1971)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 4 (1971), S. 93-95 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: Primary normal alkylammonium halides crystallize in a preferred crystallographic orientation, forming single or twinned layers. The basal spacings are related to the number of carbon atoms within the homologous series, and are doubled in the twin layers. The orientation of the hydrocarbon chains between the ionic heads is discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889871006423
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  • 40
    Digitale Medien
    Digitale Medien
    Charts for analysing crystallite orientation distribution function plots for hexagonal materials (1971)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 4 (1971), S. 193-196 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: Charts are given which provide a rapid and unambiguous way of attributing ideal orientations to regions of crystallite orientation distribution function plots for hexagonal materials.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S002188987100668X
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  • 41
    Digitale Medien
    Digitale Medien
    Precision determination of lattice parameters at low temperatures without the use of liquid gases (1971)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 4 (1971), S. 201-204 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: The design of a vacuum jacketed multiple-exposure back-reflection camera and the adaptation of this camera to a closed circuit pressurized helium cryostat has made it possible to determine lattice parameters by X-ray diffraction to temperatures as low as 25 °K without liquid gases. The advantages of this new design are: short exposure periods (5 to 30 minutes), multiple (usually 6) exposures on a single film at any temperature between 25 and 180 °K, elimination of film shrinkage and hence, high precision lattice constants and thermal expansion coefficient determinations; easy detection of phase transformations. The lowest temperatures can be reached in 30 minutes.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889871006708
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  • 42
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    Digitale Medien
    An X-ray diffraction method for lattice parameter measurements from corresponding Kα and Kβ reflexions (1971)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 4 (1971), S. 240-241 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: A method is proposed for precise parameter measurements based on the accurate recording of angular separation between Kα and Kβ diffraction lines. The accuracy and sensitivity of the method are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889871006769
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  • 43
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    Digitale Medien
    Scanning source X-ray topography (1971)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 4 (1971), S. 251-252 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: A modification of the Lang traversing technique is described, which allows X-ray topographs of crystal arrangements, which are sensitive to mechanical vibration, to be taken. The application of the method to X-ray interferometry and moiré topography is discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889871006782
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  • 44
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    Digitale Medien
    A metastable phase TiCu3(m) (1971)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 4 (1971), S. 257-259 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: A metastable phase TiCu3(m) has been prepared by rapid quenching from the melt (splat cooling). TiCu3(m) is orthorhombic, D0a type, with a0 = 5.450, b0 = 4.426, and c0 = 4.307 Å. Although TiCu3(m) is isotypic with a nonexistent equilibrium phase `TiCu3' reported in the literature, its structure is distinctly different from that of `TiCu3'; instead, TiCu3(m) is closely related to ZrAu3. A large metastable solid solubility of Ti in Cu was found.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889871006824
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  • 45
    Digitale Medien
    Digitale Medien
    Crystal data for lithium thallium tartrate monohydrate (1971)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 4 (1971), S. 180-181 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889871006629
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  • 46
    Digitale Medien
    Digitale Medien
    Notes and News (1971)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 4 (1971), S. 269-269 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889871006885
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  • 47
    Digitale Medien
    Digitale Medien
    Diffusion processes in metals edited by V. N. Svechnikov (1971)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 4 (1971), S. 270-271 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889871006927
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  • 48
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    Digitale Medien
    Application of normal probability plot analysis to lutetium orthoborate factors and parameters (1971)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 4 (1971), S. 284-290 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: The methods of normal probability plot analysis have been applied to two nearly complete sets of structure factors (Fmeas) and the corresponding objectively assigned standard deviations (σFmeas) obtained by diffractometer measurement with two different crystals of lutetium orthoborate. The least-squares derived positional and thermal vibration parameters are shown to be too small by a factor of 1.8, and the σFmeas to be overestimated by a factor of 1.55. The two sets of Fmeas are found to contain a small but parallel bias. The lattice constants of rhombohedral calcite-type LuBO3 are measured as aH = 4.91538±0.00002 Å and cH = 16.21200±0.00003 Å at 298°K, with six formulas in the unit cell, space group R\overline 3c. The Lu–O distance in this six-coordinated Lu compound is 2.240±0.002 Å (corrected standard deviation). The B–O distance in the BO3 triangular groups is 1.370±0.005 Å. The characteristic Θ temperature is estimated as 446±19°K.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889871006988
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  • 49
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    Digitale Medien
    Determination of small alterations in the radius of gyration by small-angle X-ray scattering (1971)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 4 (1971), S. 317-318 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: A differential method is presented for the evaluation of small-angle X-ray scattering data. The direct determination of slight changes in the radius of gyration of colloid particles is rendered possible by the method proposed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889871007040
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  • 50
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    Digitale Medien
    X-ray diffraction data on U3Si (1971)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 4 (1971), S. 326-328 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: X-ray powder data for the compound U3Si have been obtained from an alloy prepared by arc melting uranium and silicon followed by a 7 day anneal at 800°C. The d spacing determinations have been extended into the back reflection to a 2&thgr; value of 167.4 °. The observed relative intensities are compared with calculated values.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889871007088
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  • 51
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    Digitale Medien
    A device for in situ α-irradiation of diffractometer mounted single crystals (1971)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 4 (1971), S. 331-332 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: A diffractometer-mounted device for the controlled α-irradiation of the single crystals is described.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889871007118
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  • 52
    Digitale Medien
    Digitale Medien
    Absorption correction: determining the external geometry and dimensions of a single crystal (1971)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 4 (1971), S. 400-401 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889871099989
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  • 53
    Digitale Medien
    Digitale Medien
    The elimination of specimen and beam tilt errors in the Bond method of precision lattice parameter determinations (1971)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 4 (1971), S. 337-339 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: A previously given analysis of the combined specimen and beam tilt errors in Bond's single-crystal method of determining lattice parameters is extended and used to provide a method of obtaining parameters free from such errors from three separate measurements. The method requires that either the collimator or crystal be tilted by known angles between the measurements. An analytical and a simple graphical method of applying the procedure are described.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889871007167
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  • 54
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    Digitale Medien
    X-ray study of tetragonal PbO electrolytically deposited on rolled Pb substrate (1971)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 4 (1971), S. 376-379 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: Observations of preferred orientation in the rolled Pb substrate and in the anodically deposited tetragonal PbO of a Pb/PbO(t) voltaic cell, by X-ray diffraction, are reported. A Pb → PbO(t) transformation mechanism is described for the orientation relationship, (110)PbO(t)\mid\mid(100)Pb.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889871007234
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  • 55
    Digitale Medien
    Digitale Medien
    Meeting Report (1971)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 4 (1971), S. 405-407 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889871007398
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  • 56
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    Digitale Medien
    Calculation of the effect of twinning on (101) on the effective particle sizes determined from X-ray line profiles for the L10 superlattice (1971)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 4 (1971), S. 434-440 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: The Fourier coefficients of the X-ray diffraction line profiles from an ordered face-centred tetragonal (L10) structure such as MgIn or CuAu have been calculated assuming the presence of twin and incoherent boundaries on (101). It is found that reflection components with (h−l) = 0 are not affected by twinning on (101). The theoretical expression for the effective particle size is compared with some measured particle sizes for cold-worked MgIn.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S002188987100743X
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  • 57
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    Digitale Medien
    Détermination des paramètres des mailles élémentaires de composés definis des systèmes Pu–Cu, Pu–Ga–Cu, et Pu–Ga–Ni (1972)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 5 (1972), S. 47-50 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: Diffusion experiments involving Pu–Cu, PuGa–Cu and PuGa–Ni couples, have brought into evidence the binary compounds PuCu2 and PuCu4, a ternary compound PuCu3 with variable small amounts of gallium and the ternary compounds Pu2Ni2Ga and PuNiGa. The crystalline parameters of these compounds were determined by the Debye–Scherrer method using alloys obtained by direct processing. Powder X-ray diffraction showed the isomorphism of PuCu2 with CeCu2 and that all the above compounds are orthorhombic.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889872008702
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  • 58
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    Digitale Medien
    A double-scan method for powder X-ray diffraction film (1972)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 5 (1972), S. 54-54 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S002188987200874X
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  • 59
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    Digitale Medien
    Crystallographers (1972)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 5 (1972), S. 56-56 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889872008763
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  • 60
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    Digitale Medien
    Eigenschaften und Herstellung gebogener Kupfermonochromatoren für thermische Neutronen (1972)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 5 (1972), S. 78-83 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: The diffraction properties of a cylindrically bent, focusing copper crystal are discussed. Measurements with a γ-diffractometer and a two-axis diffractometer for thermal neutrons gave a means of checking the behaviour of the crystal. The monochromator reflects neutrons of a large range of wave-vectors, between 5.5 and 6.8 Å−1. The wavelength depends on the direction.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889872008817
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  • 61
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    Digitale Medien
    K vivodu formuli dlya krivoy profilya istinnogo raspredeleniya intensivnost po uglam rasseyaniya, obuslovlennoy faktorami dispernosti i formi oblastey kogerentnogo rasseyaniya (1972)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 5 (1972), S. 90-92 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: The formula giving the variation of X-ray intensity versus the diffraction angle due to dispersion factors and the form of the domains of coherent scattering is derived. For this case a general relation between the factor c of the Scherrer formula and the factor k = I(x)/Imax of the distribution curve is derived.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889872008842
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  • 62
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    Digitale Medien
    Light-base nuclear plate useful for monitoring in X-ray topography (1971)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 4 (1971), S. 531-532 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889871007623
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  • 63
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    Digitale Medien
    Influence of precipitation hardening and reversible martensite reactions on recrystallization textures of 17%Ni–8%Co–4%Mo steel (1971)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 4 (1971), S. 452-461 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: The respective rôles of precipitation hardening and reversible martensite reactions have been analysed in relation to development of textures in 17 %Ni-8 %Co-4 %Mo steel. Cold-rolling textures after 90 % reduction are independent of the heat treatment prior to rolling, and are described as mainly {001}〈\bar 110〉α′, and {557}〈\bar 110〉α′, components, with a {111}〈\bar 1\bar 12〉α′, component of lower intensity. The corresponding recrystallization textures produced by annealing in the austenite region vary according to prior heat treatment: solution-treated material exhibits a recrystallization texture consisting mainly of {557}〈\bar 110〉α′, and {̃510}〈\bar 150〉α′, components, whereas when precipitation of Ni3Mo takes place before the recrystallization anneal, the texture is more diffuse and contains, in addition to these components, a more even distribution of orientations which fie within a 〈111〉 fibre texture normal to the rolling plane. It is considered that the {557}〈\bar 110〉α′ + {̃510}〈\bar 150〉α′, recrystallization texture could be accounted for by a double shear transformation α′ → γ → α′, combined with texture sharpening during recrystallization in the austenite. It is necessary to invoke variant selectivity during the shear transformation in order to explain the absence of certain groups of orientations in the final α′ texture. The effect of Ni3Mo is attributed to restriction of grain boundary mobility in the austenite, so preventing sharpening of the texture at this stage by recrystallization.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889871007465
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  • 64
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    Digitale Medien
    Crystal data on Gd3Ga2 (1972)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 5 (1972), S. 142-142 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889872009021
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  • 65
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    Digitale Medien
    Crystallographers (1972)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 5 (1972), S. 144-144 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889872009069
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  • 66
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    Digitale Medien
    Structural characteristics of materials edited by H. M. Finniston (1972)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 5 (1972), S. 147-147 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889872009100
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  • 67
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    Digitale Medien
    Vergleichende Untersuchung über die röntgentopographischen Verfahren der Abbildung von Kristalldefekten (1972)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 5 (1972), S. 169-177 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: Various characteristic lattice defects in silicon have been recorded by some of the main X-ray topographic methods (Bragg and Laue case, scanning- and fixed-crystal techniques, single and double diffraction, hard and soft radiation), with the same specimens used for all methods. The comparison of the results allows some general statements on the qualification (advantages and disadvantages) of each method for detecting and investigating different kinds of lattice defects.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889872009148
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  • 68
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    Digitale Medien
    Adaption d'un ensemble de détection Si(Li) à un diffractometre X (1972)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 5 (1972), S. 177-183 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: Si(Li) semictors developed for nuclear spectrometry have achieved energy resolutions of a few hundred eV compared with the keV of the conventional detector for X-ray spectrometry or diffractometry. So far, commercially available equipment incorporating a liquid nitrogen tank is too heavy and cumbersome for existing spectrometers and diffractometers. We have redesigned a Si(Li) probe suitable to replace scintillation or gas proportional counters on any conventional equipment.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S002188987200915X
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  • 69
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    Digitale Medien
    Further studies on the nickel–aluminium system. I. β-NiAl and δ-Ni2Al3 phase fields (1972)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 5 (1972), S. 201-209 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: New lattice parameter and density results have been obtained for alloys in the β-NiAl and 6-Ni2Al3 phase fields of the nickel–aluminium system. The lattice parameter of the β-NiAl phase (CsCl-type) falls linearly from 2.8870 Å at 50 at.% Ni to 2.8618 Å at 66. at.% Ni, with 2.00 atoms per unit cell. On the other hand, the lattice parameter on the Al-rich side of NiAl falls linearly from 2.8870 Å to 2.8652 Å, while the number of atoms per unit cell falls from 2.00 to 1.817 by the creation of vacancies in normally nickel sites. The trigonal 6-Ni2Al3 phase-structure, which is essentially an extension of cubic β-NiAl, but with every third plane of nickel atoms perpendicular to the trigonal axis missing, shows a minimum in the a and c spacings at stoichiometric Ni2Al3. Density measurements indicate that the vacancies formed by the missing planes are progressively filled as nickel is added to Ni2Al3, but that a substitutional solid solution is formed on the aluminium-rich side of stoichiometric Ni2Al3 with aluminium replacing nickel atom by atom. In the NiAl phase, the number of valence electrons increases from 2.28 per unit cell at 61.9 at.% Ni to 3.00 at stoichiometric NiAl, and remains constant at 3.00 as the vacancies form until Ni2Al3 is reached, at which stage the number of vacancies will have reached a maximum when there are only 1.67 atoms per pseudo-cubic cell. The number of electrons per pseudo-cubic unit cell then begins to rise and reaches the phase boundary value of 3.12 at 37.6 at.% Ni.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889872009203
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  • 70
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    Digitale Medien
    A comparison of the fast Fourier and trigonometric Fourier algorithms (1972)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 5 (1972), S. 234-235 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: The Cooley–Tukey fast Fourier algorithm and the factored trigonometric Fourier algorithm are compared for four typical crystallographic problems. With general PL/1 programs the execution speed of the fast Fourier algorithm ranged from 4.7 to 19 times faster than the trigonometric algorithm. In addition the PL/1 fast Fourier program was 1.8 times faster than a space group specific, fixed axial length trigonometric Fourier FORTRAN program. Our results indicate that the fast Fourier is the most efficient algorithm available for crystallographic Fourier series calculations, with efficiency increasing as one goes to larger problems.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889872009264
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  • 71
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    Digitale Medien
    Zur Elementarzelle von Ca3TeO6 (1972)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 5 (1972), S. 241-242 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: X-ray powder data of Ca3TeO6 are shown not to allow an unambiguous indexing.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889872009306
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  • 72
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    Digitale Medien
    The measurement of the lattice parameters of molybdenum ditelluride (1972)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 5 (1972), S. 63-66 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: The lattice parameters of single-crystal molybdenum ditelluride have been measured by means of electron diffraction over the temperature range 100 to 470 °K. The following values were obtained for the lattice parameters at 295 °K, a = 3.5139± 0.0004 and c = 13.964± 0.005 Å. A value of 3.5188±0.0056 Å for the a parameter was also determined from the rotational moiré fringe pattern.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889872008787
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  • 73
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    Digitale Medien
    Preparation and properties of solid state material. Vol. 1 edited by R. A. Lefever (1972)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 5 (1972), S. 252-252 
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    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889872009380
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  • 74
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    Digitale Medien
    Handbook of electronic materials. Volume 5. Group IV semiconducting materials by M. Neuberger (1972)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 5 (1972), S. 253-253 
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    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889872009422
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  • 75
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    Digitale Medien
    Absorption corrections: procedures for checking crystal shape, crystal orientation, and computer absorption programs (1972)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 5 (1972), S. 298-299 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: Practical details for obtaining an accurate description of the shape of a crystal in a laboratory coordinate system for input to a general absorption program are given. Remarks on practical ways to test an absorption program, together with some comparisons of the accuracy of several widely distributed programs, are made. Comparisons are made with results derived analytically for a contrived crystal which lacks a morphological center of symmetry.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889872009549
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  • 76
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    Digitale Medien
    The role of Soller slits in small-angle scattering collimation systems (1972)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 5 (1972), S. 302-304 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: Theory is developed which allows the quantitative evaluation of an `effective' slit-length weighting function for small-angle diffractometers which make use of Soller slits. The theory is illustrated with an example and the disadvantages connected with the use of Soller slits in SAXS experiments are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889872009574
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  • 77
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    Digitale Medien
    A computer holographic method for the optical reconstruction of a molecular image from X-ray diffraction data (1974)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 7 (1974), S. 399-400 
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    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: A new method for the phase control in an optical diffractometer is described. A photographic negative of the weighted reciprocal net is used as the mask of the diffractometer. The phase of each reciprocal point is represented by the shift of the position in the reciprocal plane. Although this method cannot reproduce the periodic image of a crystal, it is particularly suitable for reconstructing the image of a molecule in a crystal.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889874009903
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  • 78
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    Digitale Medien
    Wave propagation in elastic solids by J. D. Achenbach (1974)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 7 (1974), S. 408-408 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889874010004
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  • 79
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    Digitale Medien
    Crystal data for ammonium tri- and tetrapolyphosphates (1974)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 7 (1974), S. 404-405 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: Unit-cell parameters and space groups have been determined on four ammonium polyphosphate salts. (NH4)5P3O10.2H2O is monoclinic with space group P21/n, a = 16.643, b = 6.719, c = 13.843, β = 98.61. (NH4)5P3O10.H2O is monoclinic, space group P2/n or Pn, a = 10.949, b = 10.377, c = 6.426, β = 91.06. (NH4)6P4O13.2H2O is triclinic, a =13.426, b = 11.874, c = 6.524, α = 93.80, β = 84.78, γ = 106.97. (NH4)4 H2P4O13 is orthorhombic, space group P22121, a = 13.359, b = 13.244, c = 8.214.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889874009940
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  • 80
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    Digitale Medien
    A simple structure-building technique (1974)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 7 (1974), S. 406-406 
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    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889874009964
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  • 81
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    Digitale Medien
    Unit pressures of extractive metallurgy by R. D. Pehlke (1974)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 7 (1974), S. 408-408 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889874010016
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  • 82
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    Digitale Medien
    Unit-cell dimension measurements from pairs of X-ray diffraction lines (1973)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 6 (1973), S. 122-128 
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    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: A method is described for precise unit-cell dimension measurements based on the accurate recording of the angular separation between two neighbouring orders of reflection which may correspond to different wavelengths. A number of pairs of reflections at high diffraction angles are used and a least-squares refinement is performed after taking into account the angular dependence of systematic aberrations. The method has been tested on Ge and several selenides (InSe, In2Se3, GaSe) and the accuracy of the results is discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889873008277
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  • 83
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    Digitale Medien
    The precision of interplanar distances measured by an energy-dispersive diffractometer (1973)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 6 (1973), S. 117-122 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: According to the papers so far published about diffractometers with energy-dispersive detectors, the precision of a measured lattice spacing has been estimated to be about 0.05% at best. In the present paper, it is shown that a precision of about 0.01% is attainable without much difficulty by the use of a suitable Soller-slit system and a suitable scattering angle. This was demonstrated on an Al powder sample. It has been concluded that the limitation of precision is in the electronics rather than in the detector, when the necessary conditions are realised in the present improved system.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889873008265
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  • 84
    Digitale Medien
    Digitale Medien
    An incident-beam ionization chamber and charge integration system for stabilization of X-ray diffraction experiments (1973)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 6 (1973), S. 129-132 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: A low-absorption ionization chamber has been developed to monitor the incident beam in X-ray diffraction experiments. The chamber current is digitized by means of an ultra-stable linear charge integrator. The digital signal is used to control the measuring time for each point of the desired scattering curve. In our application, fluctuations in the scattering curve resulting from instability of the incident beam have been reduced by a factor of 5.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889873008289
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  • 85
    Digitale Medien
    Digitale Medien
    The measurement of single-crystal lattice parameters using a double-diffraction technique (1973)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 6 (1973), S. 132-135 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: A modified double-diffraction technique is described for the accurate measurement of lattice parameters of (100) slices of gallium arsenide. The method relies on the selection of appropriate reflexions for producing a pseudo-point of triple diffraction, and the determination of the wavelength necessary to produce such a triple point. Results are presented which show that lattice parameters can be determined rapidly and simply to better than 1 in 105.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889873008290
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  • 86
    Digitale Medien
    Digitale Medien
    Double diffraction des rayons X par une substance amorphe (1973)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 6 (1973), S. 139-144 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: The effect of the double-scattering process on X-ray intensity diffracted by an amorphous sample is studied in the case of &thgr;–2&thgr; diffractometric techniques with monochromator, by transmission and reflexion; the small-angle X-ray scattering method is taken into account. An experimental application shows the amount of the correction in the case of transmission.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889873008319
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  • 87
    Digitale Medien
    Digitale Medien
    Precision lattice parameters and the coefficients of thermal expansion of hexagonal germanium dioxide (1973)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 6 (1973), S. 136-138 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: With a Unicam 19 cm high-temperature powder camera, precision lattice parameters of hexagonal germanium dioxide have been determined at various temperatures in the range 36 to 516 °C by the X-ray method. From these data the coefficients of thermal expansion have been evaluated by a graphical method. The temperature dependence of the coefficients of thermal expansion, α|| and α⊥, parallel and perpendicular to the principal axis respectively, are represented by the following equations: \alpha _{\mid \mid} = 1.258 \times 10^{-6} + 1.359 \times 10^{-8}T - 1.032 \times 10^{-11} T^{2}{^\circ} {\rm C}^{-1}\alpha _{\perp} = 10.558 \times 10^{-6} + 8.813 \times 10^{-9}T + 5.785 \times 10^{-12} T^{2}{^\circ} {\rm C}^{-1} where T is the numerical value of the temperature expressed in °C. The thermal expansion of hexagonal GeO2 has been compared with that of the isomorphous α-quartz and the polymorphous tetragonal rutile-type GeO2.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889873008307
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  • 88
    Digitale Medien
    Digitale Medien
    Influence of crystal size on electron diffraction intensities (1973)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 6 (1973), S. 145-148 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: The Debye–Waller factor for small ( ̃35 Å) and large ( ̃290 Å) Au crystallites was measured by electron diffraction at two temperatures. After correction for the large dynamical effects observed for the big crystallites, the Debye–Waller factors for the two specimens remained different. The difference is attributed to surface influences on the lattice vibrations.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889873008320
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  • 89
    Digitale Medien
    Digitale Medien
    Computerization of Ruland's X-ray method for determination of the crystallinity in polymers (1973)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 6 (1973), S. 148-152 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: A general procedure for determination of the crystallinity in polymers from the X-ray diffraction pattern was developed by modifying the method described by Ruland [Acta Cryst. (1961), 14, 1180–1185] on two points. One of these modifications furthermore permits substantial reduction of the required number of experimental data without a serious loss of accuracy being involved.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889873008332
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  • 90
    Digitale Medien
    Digitale Medien
    Consideration of the optimum precession angle for upper-level precession photographs. A correction (1973)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 6 (1973), S. 158-158 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: A correction to Fig. 1 in Cross, Fenn & Graham [J. Appl. Cryst. (1972), 5, 304–305] is given.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889873008356
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  • 91
    Digitale Medien
    Digitale Medien
    X-ray powder diffractometry of small (20 mg to 1 μg) samples using standard equipment (1973)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 6 (1973), S. 153-157 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: Calculations of the diffraction intensities from a small specimen on a counter diffractometer show that, with a 10–20 mg specimen, the intensities should be 50% or more of those obtained from a normal specimen. Observed values are in reasonable agreement with the calculations. With small quantities the strategy is to disperse the sample evenly as a fine powder over the whole irradiated area. This is especially important at the lower diffraction angles. A glass support is usually suitable. With specimens 〈 1 mg in weight dispersion difficulties can be eased by mixing with diamond powder, and background scattering can be considerably reduced by using a single crystal as a support. The lower limit of detection of quartz by this method has been shown to be probably 〈 1 μg. Quantitative estimates of 10% quartz in a few milligrams of sample and crystallite size measurements on 50 μg of nickel oxide are examples of work with these experimental arrangements.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889873008344
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  • 92
    Digitale Medien
    Digitale Medien
    Notes and News (1973)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 6 (1973), S. 162-162 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889873008381
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  • 93
    Digitale Medien
    Digitale Medien
    Crystal data on 11-chloro-indazole [2,3-9][3,1]benzoxazin-5-one, C14H7ClN2O2 (1973)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 6 (1973), S. 161-161 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: Lattice parameters of two forms of the title compound were determined using Weissenberg photography. Both forms are triclinic with 4 molecules in the unit cell.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S002188987300837X
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  • 94
    Digitale Medien
    Digitale Medien
    Observation, par méthode de Lang, de différents arrangements de dislocations après recuit sur des cristaux de fluorure de lithium (1973)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 6 (1973), S. 158-160 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: The influence of thermal treatments on the dislocation density in a lithium fluoride single-crystal has been studied using Lang's X-ray diffraction topography technique. Three principal types of dislocation arrangement, polygonization walls, high (104 cm cm−3) and low (≲ 102 cm cm−3) dislocation-density subgrains were observed. It is found that obtaining specimens suitable for X-ray observation requires severe thermal preparation conditions and depends particularly on the cooling rate (10°C/h).
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889873008368
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  • 95
    Digitale Medien
    Digitale Medien
    Crystallographers (1973)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 6 (1973), S. 162-162 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889873008393
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  • 96
    Digitale Medien
    Digitale Medien
    Researches in powder metallurgy edited by B. A. Borok (1973)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 6 (1973), S. 162-162 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S002188987300840X
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  • 97
    Digitale Medien
    Digitale Medien
    Technik-Wörterbuch Kristallografie. Englisch-Deutsch-Französisch-Russisch by K.-O. Backhaus (1973)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 6 (1973), S. 163-164 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889873008435
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  • 98
    Digitale Medien
    Digitale Medien
    Herstellung von Kupfereinkristallen Kleiner Versetzungsdichte by E. Kappler, W. Uelhoff, H. Ehmer and F. Abbink (1973)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 6 (1973), S. 163-163 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889873008411
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  • 99
    Digitale Medien
    Digitale Medien
    Crystal growth 1971. Proceedings of 3rd International Conference, France 1971 edited by R. A. Laudise, J. B. Mullin and B. Mutaftschiev (1973)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 6 (1973), S. 163-163 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889873008423
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  • 100
    Digitale Medien
    Digitale Medien
    Introduction to glass science edited by L. D. Pye, H. J. Stevens and W. C. La Course (1973)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 6 (1973), S. 164-164 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889873008447
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