Synthesis, structures and magnetic properties of the new vanadates AgMnVO4 and RbMnVO4

被引：11

作者：

Ben Yahia, Hamdi ^{[1
]}

Gaudin, Etienne ^{[1
]}

Darriet, Jacques ^{[1
]}

机构：

[1] Univ Bordeaux, CNRS, ICMCB, F-33608 Pessac, France

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2008年 / 181卷 / 11期

关键词：

Vanadate; Stuffed-tridymite; Maricite; Merohedral twinning; Canted antiferromagnetism;

D O I：

10.1016/j.jssc.2008.08.001

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The new compounds, AgMnVO4 and RbMnVO4 have been synthesized by solid state reaction route. Their crystal structures were determined from single-crystal X-ray diffraction data for RbMnVO4 and powder X-ray diffraction data for AgMnVO4. AgMnVO4 crystallizes with the maricite-type structure in space group Pnma, a = 9.5778(6) angstrom, b = 6.8518(4) angstrom, c = 5.3734(3) angstrom and Z = 4. RbMnVO4 crystallizes in space group P6(3) with a stuffed tridymite-type structure, a = 11.2584(3), c = 8.9893(13) angstrom and Z = 8. A merohedral twinning was taken into account for its structural refinement. To our knowledge this is the first vanadate showing this structural type. AgMnVO4 and RbMnVO4 were characterized by magnetic susceptibility and specific heat measurements. AgMnVO4 is antiferromagnetic with a Neel temperature of 12.3 K determined by specific heat measurements. RbMnVO4 exhibits canted antiferromagrietism with a Neel temperature of 6.5 K. (C) 2008 Elsevier Inc. All rights reserved.

引用

页码：3103 / 3109

页数：7

共 27 条

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