A-site deficient perovskites in the SrO-ZrO2-Nb2O5 system: Composition dependent structures from neutron powder diffraction data

被引：2

作者：

Schmid, Siegbert ^{[1
]}

Withers, Ray L. ^{[2
]}

机构：

[1] Univ Sydney, Sch Chem, Sydney, NSW 2006, Australia

[2] Australian Natl Univ, Res Sch Chem, Canberra, ACT 0200, Australia

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2012年 / 191卷

基金：

澳大利亚研究理事会;

关键词：

Defect perovskite; Neutron diffraction; Electron diffraction; Powder diffraction; TRANSITION-METAL CARBIDES; SHORT-RANGE ORDER; PHASE-TRANSITIONS; CRYSTAL-STRUCTURE; NACL STRUCTURE; STRONTIUM; CONDUCTIVITY; TEMPERATURE; REFINEMENT; CHEMISTRY;

D O I：

10.1016/j.jssc.2012.02.039

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A series of A-site deficient perovskite-type phases was synthesised and characterised in the SrO-ZrO2-Nb2O5 system. The composition range was established as Sr0.70+xZr0.40+2xNb0.60-2xO3, similar to 0.02 <= x <= 0.30, and the resulting structures refined using high resolution neutron powder diffraction data. While structures in this composition range are closely related to the cubic perovskite parent, the symmetry for all investigated compositions is lowered to tetragonal or orthorhombic. For x < 0.15 the resulting space group is tetragonal I4/mcm, for x > 0.15 it is orthorhombic Pnma and for x=0.15 two phases co-exist, in space groups I4/mcm and Pnma. Crown Copyright (C) 2012 Published by Elsevier Inc. All rights reserved.

引用

页码：63 / 70

页数：8

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