A HIGH-PRESSURE X-RAY-DIFFRACTION STUDY OF A PHASE-TRANSITION IN KMNF3

被引:11
|
作者
ASBRINK, S
WASKOWSKA, A
RATUSZNA, A
机构
[1] POLISH ACAD SCI,INST LOW TEMP & STRUCT RES,PL-50950 WROCLAW,POLAND
[2] SILESIAN UNIV,INST PHYS,PL-40007 KATOWICE,POLAND
关键词
HIGH PRESSURE; X-RAY DIFFRACTION; PHASE TRANSITIONS; KMNF3;
D O I
10.1016/0022-3697(93)90335-O
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Unit-cell parameters of KMnF3 single crystals have been measured by X-ray diffraction under hydrostatic pressure up to 9.5 GPa in a diamond-anvil cell. A cubic/tetragonal structural phase transition has been observed at P(c) = 3.1 GPa. The tetragonal phase was stable to the upper limit of the measured pressure range (P = 10.0 GPa) and a linear pressure dependence of the macroscopic spontaneous strain epsilon(s) above P(c) has been shown. The linear and volume compressibilities of both phases have been calculated.
引用
收藏
页码:507 / 511
页数:5
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