Pressure-induced amorphization in Y2(WO4)3:: in situ X-ray diffraction and Raman studies

被引：32
作者：
Karmakar, S [1 ]
Deb, SK
Tyagi, AK
Sharma, SM
机构：
[1] Bhabha Atom Res Ctr, Synchrotron Radiat Sect, Bombay 400085, Maharashtra, India
[2] Bhabha Atom Res Ctr, Div Appl Chem, Bombay 400085, Maharashtra, India
来源：
JOURNAL OF SOLID STATE CHEMISTRY | 2004年 / 177卷 / 11期
关键词：
high pressure; Y-2(WO4)(3); X-ray diffraction; Raman scattering;
D O I：
10.1016/j.jssc.2004.08.020
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The high-pressure behavior of Y-2(WO4)(3) has been investigated at room temperature by in situ X-ray diffraction and Raman scattering measurements. Both the studies show that beyond similar to3 GPa, this compound smoothly transforms from the ambient orthorhombic phase to a disordered phase. The structural modifications are found to be reversible up to similar to4 GPa but become irreversible at higher pressures. Low pressures of transformation imply that these changes are intrinsic and not due to nonhydrostatic stresses. In addition, the correlation between the stability range of orthorhombic phase and counter cation size supports that this compound has a large field of negative thermal expansion in this family of compounds. (C) 2004 Elsevier Inc. All rights reserved.
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收藏
页码：4087 / 4092
页数：6
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