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  • Springer Nature  (83,527)
  • International Union of Crystallography (IUCr)  (10,925)
  • American Meteorological Society
  • American Physical Society (APS)
  • 1975-1979  (31,018)
  • 1965-1969  (33,051)
  • 1955-1959  (22,990)
  • 1930-1934
Collection
Publisher
Years
Year
  • 11
    Electronic Resource
    Electronic Resource
    Graphitation partielle de quelques carbones durs. Etude en microscopie et microdiffraction électroniques (1968)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 1 (1968), S. 218-226 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: All the hard carbons are composed of three phases when they are heated above 2000°C: non-graphitizable carbon, graphitizable carbon, and graphite (the latter two appearing only in very small amounts). When the heat treatment temperature is increased to 3000°C, these phases change in various ways. At low temperatures, the non-graphitizable phase is formed by small turbostratic stacks of carbon layers which are oriented completely at random inside the carbon grains. Above 2000°, these stacks begin to undergo mutual rearrangement to produce small fibers by ordering roughly parallel to each other. The graphitizable phase is formed of spheres made up of conical rolled spirals, which are themselves made up by turbostratic stacking of the carbon layers. When heat treated, each sphere transforms to graphite very suddenly. The third phase is well crystallized graphite with stacking faults and twist defects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889868005376
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  • 12
    Electronic Resource
    Electronic Resource
    Characterization of phases in the 50–60 at. % Te region of the Bi–Te system by X-ray powder diffraction patterns (1968)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 1 (1968), S. 241-246 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: Samples in the Bi–Te system containing 59.0, 58.0, 57.0, 55.0, 51.0, and 50.0 at.% Te, in addition to 5 samples within the Bi2Te3 homogeneity range, have been equilibrated near 525 or 450°C and room temperature powder diffraction patterns taken. There are now 4 known phases in the 50–60 at.% Te region. The 59.0 and 58.0 at.% samples are two phase at 525°C. The 57.0 and 55.0 at.% samples are new phases with hexagonal parameters, a = 4.4106±0.0002 Å, c = 54.330±0.003 Å and a = 4.4214±0.0004 Å, c = 78.195±0.012 Å, respectively. The 51.0 and 50.0 at.% samples are two-phase at 525 C. At 450°C the 51.0 at.% sample is single phase while the 50.0 at.% sample probably is not. The common indexing scheme for the 50.0 and 51.0 at.% samples is different from those for the 55–0 and 57.0 at.% samples. For the 51.0 at.% sample a = 4.4296±0.0002 Å and c = 24.017±0.001 Å. The 00l lines for all these phases vary strongly with composition and those near d = 9 and 5 Å are isolated enough to provide a convenient way of distinguishing among the various phases. The results are discussed in terms of other phase-diagram information. They are inconsistent with Stasova's correlation between composition and powder-pattern indices for the Bi–Te, Bi–Se, and Sb–Te systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889868005406
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  • 13
    Electronic Resource
    Electronic Resource
    Notes and News (1968)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 1 (1968), S. 262-262 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889868005467
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  • 14
    Electronic Resource
    Electronic Resource
    Etude radiocristallographique des transformations d'ordre de type αdésordre〈-〉Iordre dans les alliages ternaires or cuivre nickel et l'alliage binaire de composition remarquable AuCu3 (1968)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 1 (1968), S. 263-271 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: The study of the scattering outside the Bragg reflexions shows no local order in the ordered phase I of alloys such as Au (50 at. %) Cu (46 at. %) Ni (4 at. %) even for the smallest degree of long range order. The modulation of the scattering appears only with the presence of short range order in the disordered α phase. There is evidence of a two-phase region on the equilibrium diagram at the AuCu3 stoichiometric composition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889868005479
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  • 15
    Electronic Resource
    Electronic Resource
    Barium sodium niobate (Ba(4+x)Na(2−2x)Nb10O30): crystallographic data and thermal expansion coefficients (1968)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 1 (1968), S. 290-292 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: Accurate lattice parameters (at 25 and 48°C), density, thermal expansion coefficients, the indexed powder pattern, and optical data are given for Ba(4+x)Na(2−2x)Nb10O30, where x = 0.13±0.013, grown by pulling from a nominally stoichiometric melt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889868005522
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  • 16
    Electronic Resource
    Electronic Resource
    Analysis of the 00l reflections of carbons (1968)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 1 (1968), S. 313-317 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: In an earlier communication by the authors it was shown that the stack height distribution in a raw carbon black followed an exponential law. Extension of these studies to a heat-treated (2000°C) black showed that the exponential law is still valid when stacking is extensive. The exponential law and the effect of heat-treatment are explained by the existence in blacks of extensive stratification rather than the presence of short stacks of small layers. Evidently heat-treatment results in annealing of the strata to yield uniform layer domains and more ordered stacking. Simple expressions are derived for calculating the profiles of the 00l reflections and the coefficient of the exponent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S002188986800556X
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  • 17
    Electronic Resource
    Electronic Resource
    Notes and News (1968)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 1 (1968), S. 324-325 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889868005613
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  • 18
    Electronic Resource
    Electronic Resource
    X-ray study of long-chain secondary ammonium halides (1968)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 1 (1968), S. 323-323 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: Long chain secondary ammonium chlorides, bromides and iodides crystallize in a preferred orientation. Values of the basal spacings of the salts indicate hydrocarbon chains oriented towards each other between planes of the ionic heads. The inclination angle of the chains was found to be 40°.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889868005601
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  • 19
    Electronic Resource
    Electronic Resource
    An X-ray method for the determination of domain size from the tails of diffraction profiles (1969)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 2 (1969), S. 72-76 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: The paper describes a method for obtaining consistent estimates of domain size from an evaluation of coefficients derived from curves fitted to the tails of diffraction profiles. An estimate of the mean domain size is computed directly from the intensity data and this is equivalent to the value derived from the slope of the variance-range function. For many applications this provides a convenient alternative to the method described by Langford & Wilson (Crystallography and Crystal Perfection. London: Academic Press, 1963) but does not replace it. An advantage of the present method is its simplicity and consequent reduction in computing time. It is easier to apply if a computer is not available and is applicable in cases where one or other of the profile tails overlaps that of a neighbouring line. The results obtained by this method are comparable in accuracy to those given by existing techniques.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S002188986900656X
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  • 20
    Electronic Resource
    Electronic Resource
    Specimen surface preparation errors in quantitative electron-probe microanalysis (1969)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 2 (1969), S. 18-24 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: The usual method of specimen preparation for electron-probe microanalysis can introduce errors of up to about ±3% in the estimates of the amount of an element present. It is believed that these errors are caused by the formation of `flowed' layers on the surfaces of polished samples. Two methods of reducing the errors are described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S002188986900642X
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