STRUCTURAL AND VIBRATIONAL STUDY OF VF3

被引：26

作者：

DANIEL, P ^{[1
]}

BULOU, A ^{[1
]}

LEBLANC, M ^{[1
]}

ROUSSEAU, M ^{[1
]}

NOUET, J ^{[1
]}

机构：

[1] UNIV MAINE,FAC SCI,FLUORURES LAB,CNRS,URA 449,F-72017 LE MANS,FRANCE

来源：

MATERIALS RESEARCH BULLETIN | 1990年 / 25卷 / 04期

关键词：

D O I：

10.1016/0025-5408(90)90175-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The room temperature crystal structure of VF3 is reinvestigated: space group R3̄c (D63d, no 167), a = 5.168(2) A ̊, c = 13.438(5) A ̊ (hexagonal cell) with R = 0.0264 (Rw = 0.0265). The cubic-rhombohedral phase transition is studied by DSC (Tc ≈ 500°C) and an hysteresis close to 8°C is observed, showing that the transition is really first order. A Raman scattering study is performed and all the lines have been assigned from a group theory analysis. Moreover it is shown, by a Raman temperature study, that the transition can be imputed to the softening of the R5 mode of the cubic Brillouin zone. © 1990.

引用

页码：413 / 420

页数：8

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