Polymorphism of Ag3VO4

被引：17

作者：

Dinnebier, Robert E.

Kowalevsky, Anton

Reichert, Harald

Jansen, Martin

机构：

[1] Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany

[2] Max Planck Inst Met Res, D-70569 Stuttgart, Germany

来源：

ZEITSCHRIFT FUR KRISTALLOGRAPHIE | 2007年 / 222卷 / 08期

关键词：

ternary silver oxovanadates; Polymorphism; Powder diffraction structure analysis; X-ray diffraction;

D O I：

10.1524/zkri.2007.222.8.420

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

The polymorphism of Ag3VO4 was investigated with temperature dependent synchrotron powder diffraction, and differential scanning calorimetry in the temperature range 295 K <= T <= 893 K. Three crystal structures of Ag3VO4 were identified and determined from powder diffraction data: alpha-Ag3VO4 (T = 295 K, C2/c, a = 10.2672(2) angstrom, b = 4.9814(1) angstrom, c = 10.2240(2) angstrom, beta =116.0(1)degrees, V = 470.0(2)angstrom(3)), beta-Ag3VO4 (T = 423 K, I (4) over bar 2m, a = 4.9968(1) angstrom, c = 9.6911(3) angstrom, V= 241.97(1) angstrom(3)), and gamma-Ag3VO4 (T = 703 K, Fm (3) over barm, a = 7.8386(1) angstrom, V = 481.62(1) angstrom(3)). The crystal structures of all three phases of Ag3VO4 can be described as cubic closed packed arrangements of [VO4](3-) anions with the silver cations occupying all octahedral and tetrahedral voids.

引用

页码：420 / 426

页数：7

共 35 条

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