PB1-XSR4FE2O9-DELTA - A LAYERED IRON-OXIDE INTERGROWTH OF 1201-TYPE AND 0201-TYPE STRUCTURES

被引：12

作者：

LUCAS, S ^{[1
]}

GROULT, D ^{[1
]}

NGUYEN, N ^{[1
]}

MICHEL, C ^{[1
]}

HERVIEU, M ^{[1
]}

RAVEAU, B ^{[1
]}

机构：

[1] ISMRA UNIV,CNRS,URA 1318,CRISMAT LAB,BD MARECHAL JUIN,F-14050 CAEN,FRANCE

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 1993年 / 102卷 / 01期

关键词：

D O I：

10.1006/jssc.1993.1004

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A new layered iron oxide, Pb1-xSr4Fe2O9-δ, has been isolated for 0 ≤ x ≤ 0.2. Its structural model which corresponds to a regular intergrowth of single [SrFeO3-δ]∞ perovskite layers with single [SrO]∞ and double [(SrO)(Pb1-xO)]∞ rock salt layers, has been established by high resolution electron microscopy (HREM) and powder XRD. The existence of numerous defects-local variation of the nature of the cations, modulations of the atomic layers, and intergrowth defects interpreted as [Sr3Fe2O7-δ]∞ and [Sr4Fe3O10-δ] layers-has been observed by HREM. The existence for Fe(III) of two “5 + 1” coordinations for x = 0, and of three coordinations for x ≠ 0 (two 5 + 1 and one pure pyramidal coordination) has been deduced from Mössbauer spectroscopy measurements. © 1993 Academic Press, Inc.

引用

页码：20 / 30

页数：11

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