Crystal structure and magnetic properties of the hexagonal uranium dichalcogenides gamma US2 and gamma USe2

被引：7
作者：
Daoudi, A
Levet, JC
Potel, M
Noel, H
机构：
[1] UNIV RENNES 1,CHIM SOLIDE & INORGAN MOL LAB,CNRS,URA 1495,F-35042 RENNES,FRANCE
[2] UNIV HASSAN II,FAC SCI AIN CHOCK,CHIM SOLIDE LAB,CASABLANCA,MOROCCO
来源：
MATERIALS RESEARCH BULLETIN | 1996年 / 31卷 / 10期
关键词：
chalcogenides; crystal structure; magnetic properties;
D O I：
10.1016/0025-5408(96)00113-4
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The crystal structure of the hexagonal uranium disulfide gamma US2 (hexagonal P (6) over bar 2m, a = 7.236(2) Angstrom, c = 4.062(1) Angstrom, gamma = 120 degrees) has been determined from single crystal X-ray diffraction data and confirmed by Rietveld refinements X-ray powder diffraction intensities of the isostructural selenide gamma USe2 (a = 7.6328(3) Angstrom, c = 4.1897(2) Angstrom, gamma = 120 degrees). They crystallize with the anti-Fe2P-type structure. The sulfide gamma US2 exhibits weak ferromagnetism below approximate to 10 K, and the selenide is a ferromagnet with a Curie temperature of approximate to 20 K and an ordered moment of 0.72 mu B/U under 20 kGauss.
引用
收藏
页码：1213 / 1218
页数：6
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