PREPARATION AND CHARACTERIZATION OF NEW 1-2-1-2 COMPOUNDS MA2RECU2O8-DELTA AND NB1-XRUXSR2RECU2O8-DELTA (M=NB OR TA, A=BA OR SR, AND RE=PR OR SM)

被引：16

作者：

HELLEBRAND, B ^{[1
]}

WANG, XZ ^{[1
]}

STEGER, PL ^{[1
]}

机构：

[1] JOHANNES KEPLER UNIV,A-4040 LINZ,AUSTRIA

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 1994年 / 110卷 / 01期

关键词：

D O I：

10.1006/jssc.1994.1131

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

New compounds MA2RECu2O8-delta (M = Nb or Ta, A = Ba or Sr, and RE = Pr or Sm) have been prepared and characterized. Structural analysis revealed that they crystallize in a 1-2-1-2 TaBa2LaCu2O8-delta structure type similar to that of YBa2Cu3O7. Cations such as Nb3+, Ta5+, and Ru4+ are accommodated in the basal plane and the double CuO2 pyramidal planes are maintained. All the compounds show semiconducting behavior. With Ru substitution the formal copper valence increases from +2 to about +2.14. (C) 1994 Academic Press, Inc.

引用

页码：32 / 35

页数：4

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