ON THE CRYSTAL-STRUCTURES OF LA2TI2O7 AND LA5TI5O17 - HIGH-RESOLUTION ELECTRON-MICROSCOPY

被引：45

作者：

WILLIAMS, T

SCHMALLE, H

RELLER, A

LICHTENBERG, F

WIDMER, D

BEDNORZ, G

机构：

[1] UNIV ZURICH,INST INORGAN CHEM,CH-8057 ZURICH,SWITZERLAND

[2] IBM CORP,DIV RES,ZURICH RES LAB,CH-8803 RUSCHLIKON,SWITZERLAND

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 1991年 / 93卷 / 02期

关键词：

D O I：

10.1016/0022-4596(91)90328-F

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The structure of La5Ti5O17 has been examined by high-resolution transmission electron microscopy combined with powder X-ray and thermogravimetric analysis. It comprises five [TiO6] octahedra-thick layers isomorphous with {1 0 0} slabs of the LaTiO3 orthorhombic perovskite structure, bounded by crystallographic shear parallel with the perovskite [0 0 1] direction. La atoms occupy the distorted perovskitic A sites. The structure is derived from the homologous La2Ti2O7 by elimination of 1 35 of the oxygens from this four-octahedra-thick layered structure. Both compounds are members of an homologous series based on variation in the anion to cation ratio. © 1991.

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页码：534 / 548

页数：15

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