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  • International Union of Crystallography (IUCr)  (4,538)
  • American Institute of Physics (AIP)
  • 1970-1974  (4,538)
Collection
Publisher
Years
Year
  • 11
    Electronic Resource
    Electronic Resource
    Crystal data on cubic ytterbium(II) iodide, YbI2 (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 193-193 
    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/S0021889870005976
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  • 12
    Electronic Resource
    Electronic Resource
    Growing crystals from solutions by T. G. Petrov, E. B. Treivus and A. P. Kasatkin (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 196-196 
    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/S0021889870006015
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  • 13
    Electronic Resource
    Electronic Resource
    The structure of vitreous boron oxide (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 251-257 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: A new study of the structure of vitreous boron oxide has been made under greatly improved conditions. Using Rh Kα radiation with the method of fluorescence excitation, reliable intensity values were measured to 4πsin&thgr;/λ = 20 Å−1, and a rigorous interpretation was obtained in terms of pair functions. Each boron is triangularly surrounded by 3 oxygen atoms with a B–O distance of 1.37 Å. Each oxygen atom is bonded to 2 boron atoms. The major part of the glass is made up of boroxol groups B3O6 (a hexagonal ring of 3 boron atoms and 3 oxygen atoms with 3 corner oxygen atoms outside the ring). These groups are linked together by sharing the corner oxygen atoms, with randomness in orientation about the B–O bond directions at the shared oxygen atoms. Within the ring the B–O–B angle is 120° and at the shared oxygen it is approximately 130°. There is satisfactory agreement between the calculated and measured pair function distribution curves. In vitreous B2O3 the scheme of bonding does not fill space, and any boroxol group has neighboring groups which are not directly connected to it by B–O and O–B bonds. The measured pair function areas indicate neutral atoms, so that the bonding is predominantly covalent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889870006143
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  • 14
    Electronic Resource
    Electronic Resource
    Rapid orientation and mounting of spherical crystals for crystal structure analysis (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 284-284 
    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/S0021889870006210
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  • 15
    Electronic Resource
    Electronic Resource
    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
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889870006131
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  • 16
    Electronic Resource
    Electronic Resource
    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
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889870006179
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  • 17
    Electronic Resource
    Electronic Resource
    Meetings (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 286-286 
    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/S0021889870006246
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  • 18
    Electronic Resource
    Electronic Resource
    Diffractometer measurements on a monolayer of filings: comparison with a thick specimen (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 277-279 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: An investigation of crystallite sizes in a cold-worked magnesium–indium alloy led to the use of diffractometer specimens composed of a monolayer of filings adhering to a thin film of vaseline on a glass slide. The characteristics of this type of specimen have been further investigated by comparison of diffractometer measurements on nickel filings in the form of monolayer and 1.5 mm thick specimens. Crystallite sizes obtained by Fourier analysis and lattice parameters are in good agreement. The diffraction line intensities are of similar magnitude at high angles but the monolayer specimen intensities decrease at low Bragg angles relative to those from the thick specimen. The effects of specimen transparency to X-rays on line breadths, peak positions and intensities are briefly discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889870006180
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  • 19
    Electronic Resource
    Electronic Resource
    Notes and News (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 285-285 
    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/S0021889870006234
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  • 20
    Electronic Resource
    Electronic Resource
    Mineralogical applications of crystal field thoery by R. G. Burns (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 287-287 
    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/S0021889870006271
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