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

Authors
ASBRINK S WASKOWSKA A RATUSZNA A
Citation
S. Asbrink et al., A HIGH-PRESSURE X-RAY-DIFFRACTION STUDY OF A PHASE-TRANSITION IN KMNF3, Journal of physics and chemistry of solids, 54(4), 1993, pp. 507-511
Citations number
22
Categorie Soggetti
Physics, Condensed Matter",Chemistry
Journal title
Journal of physics and chemistry of solids → ACNP
ISSN journal
00223697
Volume
54
Issue
4
Year of publication
1993
Pages
507 - 511
Database
ISI
SICI code
0022-3697(1993)54:4<507:AHXSOA>2.0.ZU;2-S
Abstract
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 ob served 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 pres sure 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.