X-RAY-POWDER DIFFRACTION STUDY OF CATIO3 PEROVSKITE AT HIGH-TEMPERATURES

被引：1
|
作者：
LIU, X [1 ]
LIEBERMANN, RC [1 ]
机构：
[1] SUNY,DEPT EARTH & SPACE SCI,STONY BROOK,NY 11794
来源：
PHYSICS AND CHEMISTRY OF MINERALS | 1993年 / 20卷 / 03期
关键词：
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
CaTiO3 perovskite has been studied at high temperature and P = 1 bar by powder x-ray diffraction and its structure refined subsequently by the Rietveld method. This Pbnm perovskite shows a decrease of orthorhombic distortion with increasing temperature as manifested by the increasing of the inter-octahedral angles towards 180-degrees. Linear thermal expansion is observed for CaTiO3 to 1373 K; extrapolation of these data suggest a possible transition to a tetragonal or pseudo-tetragonal phase near 1600 K.
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页码：171 / 175
页数：5
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