ORIENTATIONAL ORDER-DISORDER PHASE-TRANSITION IN CALCITE

被引：15

作者：

HAGEN, M

DOVE, MT

HARRIS, MJ

STEIGENBERGER, U

POWELL, BM

机构：

[1] UNIV CAMBRIDGE,DEPT EARTH SCI,CAMBRIDGE CB2 3EQ,ENGLAND

[2] RUTHERFORD APPLETON LAB,ISIS FACIL,DIDCOT OX11 0QX,OXON,ENGLAND

[3] CHALK RIVER LAB,CHALK RIVER K0J 1J0,ONTARIO,CANADA

来源：

PHYSICA B | 1992年 / 180卷

关键词：

D O I：

10.1016/0921-4526(92)90732-8

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We have performed inelastic neutron scattering experiments on calcite in the ordered phase, foccusing on a zone boundary F-point that shows X-rav diffuse scattering. At this position we have observed an incipient soft mode along with a column of inelastic scattering ranging in energy between the soft mode energy and zero energy. The intensity of this scattering varies dramatically with temperature, and is described by an Arrhenius relation with an activation energy of 1035 K. 41045834

引用

页码：276 / 278

页数：3

共 8 条

[1]

DOVE MFA, IN PRESS

[2]

DOVE MT, 1989, PHYS CHEM MINER, V16, P503, DOI 10.1007/BF00197019

[3]

DOVE MT, IN PRESS AM MINERAL

[4] AN INFRARED SPECTROSCOPIC STUDY OF THE INTERNAL-MODES OF SODIUM-NITRATE - IMPLICATIONS FOR THE STRUCTURAL PHASE-TRANSITION [J].