有序双钙钛矿Sr2YTaO6和Sr2YNbO6的结构

Structures of the ordered double perovskites Sr2YTaO6 and Sr2YNbO6.

作者信息

Howard Christopher J, Barnes Paris W, Kennedy Brendan J, Woodward Patrick M

机构信息

Australian Nuclear Science and Technology Organisation, Private Mail Bag 1, Menai, NSW 2234, Australia.

出版信息

Acta Crystallogr B. 2005 Jun;61(Pt 3):258-62. doi: 10.1107/S0108768105012395. Epub 2005 May 13.

DOI:10.1107/S0108768105012395

PMID:15914890

Abstract

The ordered perovskite Sr(2)YTaO(6), distrontium yttrium tantalum hexaoxide, has been reported as showing an unusual triclinic structure, at odds with the results from a recent group-theoretical analysis. A new investigation establishes that Sr(2)YTaO(6) and the isostructural Sr(2)YNbO(6), distrontium yttrium niobium hexaoxide, in fact both adopt the commonly occurring monoclinic structure, with the space-group symmetry P2(1)/n.

摘要

有序钙钛矿Sr₂YTaO₆，即二锶钇钽六氧化物，已被报道呈现出一种不寻常的三斜结构，这与最近的群论分析结果不一致。一项新的研究确定，Sr₂YTaO₆和同结构的Sr₂YNbO₆，即二锶钇铌六氧化物，实际上都采用常见的单斜结构，空间群对称类型为P2(1)/n。