HIGH-PRESSURE X-RAY STUDIES OF UAS AND UTE

被引：14

作者：

LEGER, JM

VEDEL, I

REDON, AM

ROSSATMIGNOD, J

VOGT, O

机构：

[1] CEN,DEPT RECH FONDAMENTALE,SERV PHYS,MAGNETISME & DIFFRACT NEUTRON GRP,F-38041 GRENOBLE,FRANCE

[2] SWISS FED INST TECHNOL,FESTKORPERPHYS LAB,CH-8093 ZURICH,SWITZERLAND

来源：

SOLID STATE COMMUNICATIONS | 1988年 / 66卷 / 11期

关键词：

CRYSTALS; -; Structure; X-RAYS; Diffraction;

D O I：

10.1016/0038-1098(88)91127-1

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The volumes of UAs and UTe have been determined as a function of pressure by X-ray powder diffraction in a diamond anvil cell up to 25 GPa at room temperature. Both compounds exhibit a transition from the cubic NaCl-type to CsCl-type structure under high pressure. The bulk modulus and its first pressure derivative have been determined for each phase. In uranium monopnictides the variation of the bulk modulus as the minus 5/3 power of the unit cell volume and the large bulk modulus of UAs compared to NpAs give support to 5f delocalization. The bulk modulus of UTe has an exceptionally low value and the possibility of a mixed valence state as in TmSe is discussed.

引用

页码：1173 / 1176

页数：4

共 21 条

[1] KONDO VOLUME COLLAPSE AND THE GAMMA-]ALPHA TRANSITION IN CERIUM [J].