NONSTOICHIOMETRY AND TWINNING IN PEROVSKITE-RELATED CHROMITES

被引：8

作者：

GONZALEZCALBET, JM

RAMIREZ, J

VALLETREGI, M

机构：

[1] Departamento de Quimica Inorganica, Facultad de Quimicas, Universidad Complutense

来源：

JOURNAL OF THE LESS-COMMON METALS | 1990年 / 157卷 / 02期

关键词：

D O I：

10.1016/0022-5088(90)90181-I

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Three perovskite-related solid solutions have been characterized by X-ray diffraction, electron diffraction and electron microscopy: LaCr1-x-FexO3(0 ≤ x ≤ 1), La1-yCayCrO3-z(0 ≤ y ≤ 0.5) and La1-yCayCr1-x Fex-O3-z(0 ≤ y ≤ 0.5; 0 ≤ x ≤ 0.5). When heated in air, the AMO3 stoichiometry is preserved, multitwinned three dimensional crystals being obtained. However, when calcium-substituted samples are treated in a reducting atmosphere, AMO3-z(0 ≤ z ≤ 0.25) solid solutions are formed, the non-stoichiometry being accommodated at random along the crystals. © 1990.

引用

页码：271 / 279

页数：9

共 30 条

[1] BROWNMILLERITE-TYPE MICRODOMAINS IN THE CALCIUM LANTHANUM FERRITES - CAXLA1-XFEO3-Y .1. 2/3-LESS-THAN X LESS-THAN-1 [J].