STRUCTURE AND OXYGEN STOICHIOMETRY IN LA2-XSR1+XCU2O6-Y, ND2-XSR1+XCU2O6-Y, SM2-XSR1+XCU2O6-Y PHASES

被引：36

作者：

GRASMEDER, JR ^{[1
]}

WELLER, MT ^{[1
]}

机构：

[1] UNIV SOUTHAMPTON,DEPT CHEM,SOUTHAMPTON SO9 5NH,HANTS,ENGLAND

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 1990年 / 85卷 / 01期

关键词：

D O I：

10.1016/S0022-4596(05)80064-7

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The structures of two new complex copper oxide phases refined from powder neutron diffraction data are reported. LaNdSrCu2O6 is isostructural with La2SrCu2O6 but shows an unusual ordering of Nd and La over the perovskite-type A sites. Nd1.4Sr1.6Cu2O5.79 has a structure based on a tripled (a × 3a × c)La2SrCu2O6 unit cell. The oxygen vacancy order gives rise to a unique pseudo one-dimensional tunneled copper-oxygen sublattice built from vertex-linked CuO5 square pyramids. The cation ordering in this material has been resolved. The lattice parameters and oxygen stoichiometries of a number of new phases of both structure types are presented. © 1990 Academic Press, Inc. All rights reserved.

引用

页码：88 / 99

页数：12

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