PRESSURE-INDUCED PHASE-TRANSITION IN CSGEBR3 STUDIED BY X-RAY-DIFFRACTION AND RAMAN-SPECTROSCOPY

被引：35

作者：

SCHWARZ, U ^{[1
]}

HILLEBRECHT, H ^{[1
]}

KAUPP, M ^{[1
]}

SYASSEN, K ^{[1
]}

VONSCHNERING, HG ^{[1
]}

THIELE, G ^{[1
]}

机构：

[1] INST ANORGAN CHEM,D-79104 FREIBURG,GERMANY

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 1995年 / 118卷 / 01期

关键词：

D O I：

10.1006/jssc.1995.1305

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

We have investigated the effect of hydrostatic pressure on the structural properties of CsGeBr3 by means of X-ray diffraction and Raman spectroscopy. Pressures were generated using diamond anvil cells. At 1.0(2) GPa the trigonal ambient pressure modification of CsGeBr3 undergoes a reversible first-order phase transition to a high-pressure polymorph crystallizing in the cubic perovskite structure. The variation in Ge-Br bond length is obtained from single-crystal structure refinements of both the low- and the high-pressure modifications. The phase transformation occurs at a relative volume of V/V-0 = 0.92, and the prediction from Hartree-Fock calculations is in agreement with this experimental result. (C) 1995 Academic Press, Inc.

引用

页码：20 / 27

页数：8

共 27 条

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