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  • 1
    Electronic Resource
    Electronic Resource
    X-ray diffraction studies on the arrangement of atoms in carbon blacks. I. Results of radial distribution analysis (1982)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 38 (1982), S. 333-336 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Radial distribution analysis studies by X-ray diffraction of carbon blacks obtained by pyrolysis of benzene C6H6, toluene, C7H8, and sucrose, C12H22O11, and samples of ultracarbon of the medicinal variety have been carried out. Bonding distances, coordination numbers and the layer dimensions have been determined. It has been observed that the carbon blacks have turbostratic structures. The C-C distances in the carbon layers lie in the range of that for aromatic rings and double bonds. Ultracarbon has the C-C bonding distance corresponding to graphite.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567739482000709
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Diffraction from dislocations and grain boundaries – an optical analogue study (1978)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 34 (1978), S. 284-288 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Optical transforms of the models of atomic configurations around edge and screw dislocations in f.c.c. and b.c.c. lattices as well as grain boundaries have been obtained with the help of a laser diffractometer. The models used were based on computer simulation studies of other workers. It has been observed that the intensity at the reciprocal lattice points splits into annular haloes or takes the 'figure of eight' shape in some cases. The directional dependence of the splitting has been compared with the existing theories. It has also been observed that with ordering of the dislocations at the grain boundaries, the diffraction pattern resembles that of a single dislocation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567739478000534
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Studies of the size and the misorientation of the mosaic blocks in pure and doped single crystals of potassium chloride (1975)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 8 (1975), S. 15-16 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: Extinction coefficients for pure and doped single crystals of potassium chloride have been measured with the use of polarized X-rays and subsequent analysis in terms of Zachariasen's theory of X-ray diffraction from real crystals. The sizes of the mosaic domains and the angles of misorientation between them have been determined from the extinction coefficients corresponding to copper and cobalt radiations. It has been observed that with increase in doping the sizes of the domains diminish and the misorientation between them increases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889875009442
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    Paper (German National Licenses)
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