Equation of state of lithium to 21 GPa

被引：78

作者：

Hanfland, M

Loa, I

Syassen, K

Schwarz, U

Takemura, K

机构：

[1] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

[2] European Synchrotron Radiat Facil, F-38043 Grenoble, France

[3] Max Planck Inst Chem Phys Fester Stoffe, D-01257 Dresden, Germany

[4] Natl Inst Res Inorgan Mat, Tsukuba, Ibaraki 3050044, Japan

来源：

SOLID STATE COMMUNICATIONS | 1999年 / 112卷 / 03期

关键词：

metals; crystal binding and equation of state; phase transitions; strain; high pressure; synchrotron radiation;

D O I：

10.1016/S0038-1098(99)00322-1

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The equation of state of lithium has been measured up to 21 GPa (T = 298 K) using diamond anvil cell techniques and high-resolution angle-dispersive synchrotron X-ray diffraction. The b.c.c.-f.c.c. transition has been observed near 7.5 Gpa. The volume change at the transition amounts to only 0.16(3)%. These results basically confirm earlier diffraction studies up to 10 GPa by Clinger and Shaner. Total energy calculations were performed using the full-potential linearized augmented-plane-wave method. Good overall agreement is found between calculated pressure-volume relations and the experimental data. At twofold compression the calculated repulsion is too strong. We have observed that pure Li, if in direct contact with diamond anvils, develops a corrosive effect on the anvils at pressures above 20 Gpa. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：123 / 127

页数：5

共 31 条

[11] Crystal structure of the high-pressure phase silicon VI [J].