CRYSTAL-GROWTH AND STRUCTURE OF BIVO4

被引：404

作者：

SLEIGHT, AW ^{[1
]}

CHEN, HY ^{[1
]}

FERRETTI, A ^{[1
]}

COX, DE ^{[1
]}

机构：

[1] BROOKHAVEN NATL LAB,UPTON,NY 11973

来源：

MATERIALS RESEARCH BULLETIN | 1979年 / 14卷 / 12期

关键词：

D O I：

10.1016/0025-5408(72)90227-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Large crystals of BiVO4 were grown. Extensive twinning can be related to the ferroelastic transition at 528K. The structure of BiVO4 was refined at 4.5, 295 and 566K from powder neutron diffraction data and at 295K from powder X-ray diffraction data by the Rietveld profile technique. Space groups of I41 a above and I2 b below 528K were confirmed. It is suggested that the transition in BiVO4 is driven by the lone-pair cation Bi3+. The Bi-O polyhedron is regular above the transition but becomes significantly distorted below the transition. This lone-pair distortion increases on cooling from 295 to 4.5K. The V-O tetrahedron remains regular at all temperatures. © 1979.

引用

页码：1571 / 1581

页数：11

共 19 条

[1]

[Anonymous], 1974, INT TABLES XRAY CRYS, VIV

[2] FERROELASTICITY IN BIVO4 [J].