ISSN:
1600-5724
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Chemistry and Pharmacology
,
Geosciences
,
Physics
Notes:
A general expression for the intensity of X-rays diffracted by a conglomeration of identical cylindrical crystallites with a given angular opening and with axes oriented randomly with respect to the incident beam has been worked out. This expression leads directly to the expressions derived by Mitra for one- and two-dimensional curved crystallites. For cylindrical shells the peaks are highly asymmetrical. They become sharper and shift towards the higher-angle side as the shell axes become more tilted with respect to the normal to the plane containing the incident and the equatorially diffracted beams. The overall nature of the diffraction pattern remains the same. The effect of increasing the number of scattering centres on each arc is found to be only to increase the peak heights and their sharpnesses. The effect of radial thickness is to cause a peak shift and to give rise to additional peaks. The peak heights are increased and become sharper as the radial thickness increases. The effect of curvature is an increase in the number of peaks, an increase in the general background level of scattering and a decrease in the peak heights.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S0567739471000056
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