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

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 1993年 / 54卷 / 04期

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

页码：507 / 511

页数：5

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