Experimental and theoretical determination of the optical rotation in langasite family crystals

被引：15
|
作者：
Konstantinova, A. F. [1 ]
Golovina, T. G. [1 ]
Nabatov, B. V. [1 ]
Dudka, A. P. [1 ]
Mill, B. V. [2 ]
机构：
[1] Russian Acad Sci, AV Shubnikov Crystallog Inst, Moscow 119333, Russia
[2] Moscow MV Lomonosov State Univ, Moscow 119992, Russia
来源：
CRYSTALLOGRAPHY REPORTS | 2015年 / 60卷 / 06期
基金：
俄罗斯基础研究基金会;
关键词：
STRUCTURE REFINEMENT; STRUCTURAL BASIS; GROWTH; CA3GA2GE4O14;
D O I：
10.1134/S1063774515060140
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
Optical properties of 21 langasite family crystals of different compositions have been studied. Dispersion dependences of the specific optical rotation for light propagation along the optical axis are experimentally obtained for La3Ta0.25Ga5.25Si0.5O14, La3Ta0.25Zr0.5Ga5.25O14, and La3Zr0.5Ga5Si0.5O14 crystals. Based on the known refractive indices of six crystals, the refractive indices for 15 crystals are calculated by the method of molecular refraction. Based on the experimental data, the dependence of the specific optical rotation for light propagation along the optical axis on the birefringence is plotted for 10 crystals. Using this dependence, the specific optical rotation is estimated for 11 more crystals of different compositions. Based on X-ray diffraction data, the specific optical rotation is calculated by the WinOptAct program for 13 crystals. The application of different methods makes it possible to predict the optical characteristics of langasite family crystals of different compositions.
引用
收藏
页码：907 / 914
页数：8
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