MOSSBAUER AND X-RAY-DIFFRACTION STUDIES IN MORIN TRANSITION ON TABULAR HEMATITES

被引：9

作者：

DACOSTA, GM

DASILVA, EG

DEJESUS, MF

机构：

[1] UNIV FED MINAS GERAIS,DEPT QUIM,BR-31270 BELO HORIZONTE,MG,BRAZIL

[2] UNIV FED MINAS GERAIS,DEPT FIS,BR-31270 BELO HORIZONTE,MG,BRAZIL

来源：

HYPERFINE INTERACTIONS | 1991年 / 67卷 / 1-4期

关键词：

D O I：

10.1007/BF02398191

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

Several synthetic hematites have been analysed by X-ray diffraction and Mossbauer spectroscopy. They have tabular shape and their Morin transition at 85 K show a dependence on the ratio (R) of the sizes in c and a directions. The Morin transition has been observed for samples with R = 0.43 +/- 0.05.

引用

页码：501 / 505

页数：5

共 6 条

[1]

COSTA GM, 1990, THESIS U FEDERAL MIN

[2] THE MORIN TRANSITION - A SENSITIVE CRITERION FOR TESTING THE QUALITY OF ALPHA-FE2O3 [J].