Observation of strong virtual scattering under three-beam (220, 371) X-ray diffraction in TeO2 single crystal

被引：0
|
作者：
A. E. Blagov
M. V. Kovalchuk
V. G. Kohn
Yu. V. Pisarevskiĭ
P. A. Prosekov
机构：
[1] Russian Academy of Sciences,Shubnikov Institute of Crystallography
[2] Kurchatov Institute,Russian Research Centre
来源：
Crystallography Reports | 2010年 / 55卷
关键词：
Crystallography Report; Beam Diffraction; Reflection Band; Bragg Condition; Weak Reflection;
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摘要：
A strong effect of virtual scattering has been experimentally observed when studying the nearly coplanar three-beam (220, 371) X-ray diffraction in a paratellurite single crystal under high-resolution double-crystal X-ray diffraction using MoKα1 radiation. One characteristic feature of this effect is that the angular dependence of the first (strong) reflection intensity and its shape barely change in the three-beam range of parameters, whereas very strong changes are observed for the second (weak) reflection not only in the three-beam range but also far beyond it, which is related to the variation in the two-beam diffraction parameter due to virtual scattering. The changes observed are asymmetric and make it possible to determine the triplet combination of structure-factor phases.
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页码：10 / 14
页数：4
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