Compressibility measurements on iridium

被引：39

作者：

Cerenius, Y ^{[1
]}

Dubrovinsky, L

机构：

[1] Univ Lund, S-22100 Lund, Sweden

[2] Uppsala Univ, Inst Earth Sci, S-75236 Uppsala, Sweden

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2000年 / 306卷 / 1-2期

关键词：

metals; X-ray diffraction; mechanical properties; phase transition; high pressure;

D O I：

10.1016/S0925-8388(00)00767-2

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The compressibility of iridium was determined by energy-dispersive X-ray diffraction and synchrotron radiation up to a pressure of 65 GPa in the diamond-anvil cell. The bulk modulus (B-0) was determined to be B-0,=306 (23) with B-0'=6.8 (1.5) when using a third order Birch-Murnaghan equation of state (B-M EoS). A distortion in the FCC structure of iridium was seen at pressures exceeding 59 GPa as additional diffraction peaks. These could be explained by the formation of a superlattice. By assuming hexagonal settings for a closed-packed structure it was determined to be a 14-layer closed-packed structure with cell parameters: a=2.60 and c=29.7 Angstrom at 65 GPa. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：26 / 29

页数：4

共 9 条

[1] HIGH-PRESSURE X-RAY-DIFFRACTION STUDY ON ELECTRONIC S-D TRANSITION IN ZIRCONIUM [J].