High-pressure Raman study of Al2(WO4)3

被引：52

作者：

Maczka, M

Paraguassu, W

Souza, AG

Freire, PTC

Mendes, J

Melo, FEA

Hanuza, J

机构：

[1] Polish Acad Sci, Inst Low Temp & Struct Res, PL-50950 Wroclaw 2, Poland

[2] Univ Fed Ceara, Dept Fis, BR-60455900 Fortaleza, Ceara, Brazil

[3] Univ Econ, Fac Ind & Econ, PL-53345 Wroclaw, Poland

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2004年 / 177卷 / 06期

关键词：

high pressure; phase transition; Raman spectra;

D O I：

10.1016/j.jssc.2004.01.021

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A high-pressure Raman scattering study of the tungstate Al-2(WO4)(3) is presented. This study showed the onset of two reversible phase transitions at 0.28 +/- 0.07 and 2.8 +/- 0.1 GPa. The pressure evolution of Raman bands provides strong evidences that both the transitions involve rotations/tilts of nearly rigid tungstate tetrahedra and that the structure of the stable phase in the 0.28-2.8 GPa range may be the same as the structure of the ambient pressure, low-temperature monoclinic (C-2h(5)), ferroelastic phase of Al-2(WO4)(3). (C) 2004 Elsevier Inc. All rights reserved.

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页码：2002 / 2006

页数：5

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