Raman spectroscopic study of the phase transitions in the Cs2NH4WO3F3 oxyfluoride

被引：9
|
作者：
Krylov, A. S. [1 ]
Vtyurin, A. N.
Fokina, V. D.
Goryainov, S. V.
Kocharova, A. G.
机构：
[1] Russian Acad Sci, Kirensky Inst Phys, Siberian Div, Krasnoyarsk 660036, Russia
[2] Russian Acad Sci, Inst Mineral & Petrog, Siberian Div, Novosibirsk 630090, Russia
来源：
PHYSICS OF THE SOLID STATE | 2006年 / 48卷 / 06期
基金：
俄罗斯基础研究基金会; 俄罗斯科学基金会;
关键词：
78.30.Hv; 81.40.Vw;
D O I：
10.1134/S106378340606014X
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The Raman spectra of Cs2NH4WO3F3 elpasolite crystals are studied in the temperature range 93373 K at pressures of up to 6.3 GPa. No indication of a phase transition is revealed from the Raman spectra as the temperature decreases to 93 K. An analysis of the Raman spectra measured under pressure demonstrates that the Cs2NH4WO3F3 elpasolite crystals undergo a phase transition at a pressure of 2.58 GPa. Judging from the behavior of the pressure dependences of the vibrational frequencies, the revealed phase transition is associated with the lowering of the symmetry of the WO3F3 octahedra.
引用
收藏
页码：1064 / 1066
页数：3
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