COMPRESSIBILITY AND STRUCTURE OF C-70

被引：30

作者：

LUNDIN, A ^{[1
]}

SOLDATOV, A ^{[1
]}

SUNDQVIST, B ^{[1
]}

机构：

[1] UKRAINIAN ACAD SCI,INST LOW TEMP PHYS & ENGN,KHARKOV,UKRAINE

来源：

EUROPHYSICS LETTERS | 1995年 / 30卷 / 08期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1209/0295-5075/30/8/005

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The compressibility of C70 has been investigated by means of direct piston and cylinder measurements in the temperature range 150 to 365 K and up to 1 GPa. At 296 and 343 K we find a very rapid change of volume with pressure below 0.15 GPa. We tentatively interpret this as a continuous molecular reorientation with pressure, probably resulting in a transformation from a mixture of face-centred cubic (f.c.c.) and rhombohedral (r.h.) phases to mainly pure r.h. phase. At 365 K as well as at 236 K and below we see no anomalies indicating any structural or rotational anomalies in the pressure range investigated. The zero-pressure bulk modulus decreases with increasing temperature, from 13.1 GPa at 185 K to 7.9 GPa at 365 K. Our volumetric measurements confirm a recently proposed phase diagram for C70.

引用

页码：469 / 474

页数：6