Crystal structure and optical activity of La3Nb0.5Ga5.5O14 and Sr3Ga2Ge4O14 single crystals of the langasite family

被引：0
|
作者：
V. N. Molchanov
B. A. Maksimov
A. F. Kondakov
T. S. Chernaya
Yu. V. Pisarevskii
V. I. Simonov
机构：
[1] Russian Academy of Sciences,Shubnikov Institute of Crystallography
来源：
Journal of Experimental and Theoretical Physics Letters | 2001年 / 74卷
关键词：
61.66.Fn; 61.10.Eq; 78.20.Ek;
D O I：
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中图分类号：
学科分类号：
摘要：
Precision X-ray structural studies of the La3Nb0.5Ga5.5O14 and Sr3Ga2Ge4O14 single crystals were carried out. The space group P321 was confirmed. The anomalous X-ray scattering was taken into account to establish the absolute structures (chirality) of the crystals; they proved to be of different sign. The structural features responsible for the optical activity of crystals were revealed, and the dependence of the magnitude and sign of specific rotation on the structural parameters of these compounds were determined.
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页码：222 / 225
页数：3
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