STRUCTURAL ASPECTS AND MOSSBAUER RESONANCE INVESTIGATION OF BA2FE2O5

被引：30

作者：

PARRAS, M

FOURNES, L

GRENIER, JC

POUCHARD, M

VALLET, M

CALBET, JM

HAGENMULLER, P

机构：

[1] UNIV BORDEAUX 1,CNRS,CHIM SOLIDE LAB,F-33405 TALENCE,FRANCE

[2] UNIV COMPLUTENSE,FAC CIENCIAS QUIM,DEPT QUIM INORGAN,E-28040 MADRID,SPAIN

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 1990年 / 88卷 / 01期

关键词：

D O I：

10.1016/0022-4596(90)90223-K

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Barium ferrite Ba2Fe2O5 has been studied using various techniques. X-ray diffraction and TEM have shown the phase to crystallize with a monoclinic symmetry, the unit cell being a complex supercell of a cubic perovskite cell. The Mössbauer resonance spectrum exhibits five sextuplets which have been assigned to Fe3+ in Oh, Td, and fivefold coordinated sites. Obviously Ba2Fe2O5 does not adopt the brownmillerite structure of homologous calcium (or strontium) ferrite and the oxygen vacancy ordering is more complex. © 1990.

引用

页码：261 / 268

页数：8

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