TRISTRONTIUM DIALUMINUM HEXAOXIDE - AN INTRICATE SUPERSTRUCTURE OF PEROVSKITE

被引：46

作者：

ALONSO, JA

RASINES, I

SOUBEYROUX, JL

机构：

[1] CSIC,INST CIENCIA MAT MADRID,SERRANO 113,E-28006 MADRID,SPAIN

[2] INST MAX VON LAUE PAUL LANGEVIN,F-38042 GRENOBLE,FRANCE

来源：

INORGANIC CHEMISTRY | 1990年 / 29卷 / 23期

关键词：

D O I：

10.1021/ic00348a035

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Sr3Al2O6, obtained as a white powder by solid-state reaction between SrCO3and Al2O3, has been studied by X-ray and neutron diffraction. It is cubic, a = 15.8425 (2) Å, space group Pa3, and Z = 24. Its crystal structure, refined from the neutron powder data on the basis of the Ca3Al2O6structural model, is described as a superstructure of the perovskites, ABO3. Several features, such as oxygen and A deficiency and 1:3 B-cation ordering, which are present simultaneously, suggest that the formula must be rewritten as Sr7/8□1/8(Sr1/4Al3/4)O9/4□3/4. Bond-valence values obtained for Sr atoms in the A and B subcells are discussed. © 1990, American Chemical Society. All rights reserved.

引用

页码：4768 / 4771

页数：4

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