On the structure and microstructure of "PbCrO3''

被引：50

作者：

Arevalo-Lopez, Angel M. ^{[1
]}

Alario-Franco, Miguel A. ^{[1
]}

机构：

[1] Univ Complutense Madrid, Fac Quim, Dept Quim Inorgan, E-28040 Madrid, Spain

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2007年 / 180卷 / 11期

关键词：

PbCrO3; Perovskite; High pressure; Cation deficiency; Modulated structure;

D O I：

10.1016/j.jssc.2007.09.017

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The reliability factors of a Rietveld X-ray powder refinement of PbCrO3 could be improved by considering the lead ion in a multi-minimum potential displaced from its special position. These studies coupled to EDX analysis show a certain lead deficiency. Electron diffraction and high-resolution electron microscopy reveal that the microstructure of this material is a rather complex perovskite superstructure that presents a compositional modulation, within a microdomain distribution. The proposed supercell is similar to ap x 3ap x d (approximate to 14 -18)a(p). (C) 2007 Elsevier Inc. All rights reserved.

引用

页码：3271 / 3279

页数：9

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