High pressure behavior of Sr-3(VO4)(2) and Ba-3(VO4)(2)

被引:56
作者
Grzechnik, A [1 ]
McMillan, PF [1 ]
机构
[1] ECOLE NORMALE SUPER LYON,F-69007 LYON,FRANCE
关键词
D O I
10.1006/jssc.1997.7435
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
We have studied pressure-induced transitions and structural changes in isostructural strontium and barium orthovanadates, Sr-3(VO4)(2) and Ba-3(VO4)(2), via Raman spectroscopy, The spectral changes in Ba-3(VO4)(2) can be interpreted as being due to condensation of VO43- units into edge-or corner-shared octahedra with little or no hysteresis on decompression, For Sr-3 (VO4)(2), there is a pressure-induced first-order phase change at about 150 kbar, with large hysteresis on decompression, which can be rationalized as a transition into a spinelloid series of structures, retaining the tetrahedral coordination of the V atoms. (C) 1997 Academic Press.
引用
收藏
页码:156 / 162
页数:7
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