Pressure induced hexagonal to cubic phase transformation in erbium trihydride

被引：43

作者：

Palasyuk, T ^{[1
]}

Tkacz, M ^{[1
]}

机构：

[1] Polish Acad Sci, Inst Phys Chem, PL-01224 Warsaw, Poland

来源：

SOLID STATE COMMUNICATIONS | 2004年 / 130卷 / 3-4期

关键词：

erbium hydride; high pressure; phase transition;

D O I：

10.1016/j.ssc.2004.01.040

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

High-pressure X-ray diffraction studies of erbium trihydride have been carried out in a diamond anvil cell up to 30 GPa at room temperature. Structural phase transformation from hexagonal to cubic phase has been detected at a pressure of about 15 GPa. The molar volume of ErH3 as a function of pressure has been fitted with Murnaghan's equation of state. Bulk modulus B-o and its pressure derivative B-o' have been determined for both phases. The lattice parameter of the new, cubic phase was determined as equal to 5.23 Angstrom at normal pressure. The volume change accompanied by the phase transition has been calculated. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：219 / 221

页数：3

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