Syntheses and characterization of the actinide manganese selenides ThMnSe3 and UMnSe3

被引：32

作者：

Ijjali, I ^{[1
]}

Mitchell, K ^{[1
]}

Huang, FQ ^{[1
]}

Ibers, JA ^{[1
]}

机构：

[1] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2004年 / 177卷 / 01期

基金：

美国国家科学基金会;

关键词：

synthesis; crystal structure; solid-state compound; uranium manganese selenide; thorium manganese selenide; ferromagnet;

D O I：

10.1016/j.jssc.2003.08.004

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The AnMnSe(3) (An = Th, U) compounds were synthesized from high-temperature solid-state reactions of the constituent elements at 1223 and 1273 K, respectively. Both compounds are isostructural with UFeS3 and crystallize in the space group Cmcm of the orthorhombic system with four formula units in a cell. Cell constants (Angstrom) at 153 K are: ThMnSe3, 4.0304(4), 12.795(1), 9.2883(9); UMnSe3, 3.931(5), 12.705(14), 9.148(10). The structure comprises layers of MnSe6 octahedra that alternate with layers of AnSe(8) bicapped trigonal prisms along the b-axis. Because there are no Se-Se bonds in the structure of AnMnSe(3) the formal oxidation states of An/Mn/Se are 4+/2+/2-. UMnSe3 is a ferromagnet with T-C = 62 K. (C) 2003 Elsevier Inc. All rights reserved.

引用

页码：257 / 261

页数：5

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