X-ray diffraction studies and phase transformations of CeNbO4+δ using in situ techniques

被引：41

作者：

Skinner, SJ ^{[1
]}

Kang, Y ^{[1
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Dept Mat, London SW7 2BP, England

来源：

SOLID STATE SCIENCES | 2003年 / 5卷 / 11-12期

关键词：

scheelite; X-ray diffraction; CeNbO4+delta; tetragonal;

D O I：

10.1016/j.solidstatesciences.2003.09.001

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Investigation of CeNbO4 g has revealed that the previously determined phase transformations should be revised. Whereas previous studies have indicated that a reduced tetragonal modification of CeNbO4 is produced on heating in vacuum the present study shows no evidence for this phase transformation. In contrast, a monoclinic-tetragonal phase transformation on heating in air was observed, indicating that the high temperature phase (similar to 800 degreesC) was a stable, oxygen excess tetragonal phase with a similar structure to the Scheelite mineral, CaWO4. Lattice parameters for this phase were calculated to be a = 5.3839(1) Angstrom and c = 11.6168(3) Angstrom. (C) 2003 Elsevier SAS. All rights reserved.

引用

页码：1475 / 1479

页数：5

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