Crystal Structure of Tl2[NbCl6] and Tl2[NbBr6]

被引：0

作者：

M. N. Sokolov

A. V. Rogachev

A. V. Virovets

A. S. Bogomyakov

机构：

[1] Russian Academy of Sciences,Nikolaev Institute of Inorganic Chemistry, Siberian Branch

[2] Russian Academy of Sciences,International Tomography Center, Siberian Branch

[3] Novosibirsk State University,undefined

来源：

Journal of Structural Chemistry | 2018年 / 59卷

关键词：

thallium; niobium; crystal structure; magnetism;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Single crystals of Tl2[NbCl6] (1) and Tl2 [NbBr6] (2) are obtained as black needles on heating TlCl, Nb, S2Cl2 (1) and Tl, Nb, and Br2 at 400°C (2). Tl2NbBr6 also forms in the reaction of TlBr, Nb, Br2, and S at 500°C. Both compounds crystallize in the K2[PtCl6] structure type to form non-distorted octahedral [NbХ6]2– anions (Nb–Cl 2.397(4) Å and Nb–Br 2.516(2) Å). The magnetic properties of Tl2[NbBr6] in a range 5-300 K indicate an antiferromagnetic interaction between Nb4+ ion spins (d1, S = 1/2). On cooling, the compound becomes a noncollinear ferromagnet with Tc = 23 K.

引用

页码：126 / 130

页数：4

共 21 条

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