STRUCTURAL PHASE-TRANSITIONS IN RBFEF4 .1. POWDER AND SINGLE-CRYSTAL X-RAY-DIFFRACTION STUDY OF THE ROOM-TEMPERATURE PHASE

被引：9

作者：

MORON, MC ^{[1
]}

BULOU, A ^{[1
]}

PIQUE, C ^{[1
]}

FOURQUET, JL ^{[1
]}

机构：

[1] UNIV MAINE,PHYS ETAT CONDENSE LAB,CNRS,URA 807,F-72017 LE MANS,FRANCE

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1990年 / 2卷 / 42期

关键词：

D O I：

10.1088/0953-8984/2/42/005

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A re-investigation of the room temperature phase of RbFeF4 by single crystal and powder X-ray diffraction is presented. Using a Rietveld method for refinements, the space group is shown to be orthorhombic D 2h11-Pmab instead of D23-P2 1212 as proposed in the most recent work. As a result, the space group of the room temperature phase (phase IV) is not a subgroup of the space groups of the high temperature phases III (D2h 13-Pmmn) and II (D4h5-P4/mbm). However, it obviously remains a subgroup of the highest temperature phase I (D 4h4-P4/mmm). A discondensation is deduced.

引用

页码：8269 / 8275

页数：7

共 18 条

[1] FERROELASTIC EFFECT IN RBFEF4 AND CSFEF4 [J].

ABRAHAMS, SC ;

BERNSTEIN, JL .

MATERIALS RESEARCH BULLETIN, 1972, 7 (08) :715-+

[2]

BAUMELER H, 1984, HELV PHYS ACTA, V57, P101

[3] NH4ALF4 - DETERMINATION OF THE ORDERED AND DISORDERED STRUCTURES BY NEUTRON POWDER PROFILE REFINEMENT [J].

BULOU, A ;

LEBLE, A ;

HEWAT, AW ;

FOURQUET, JL .

MATERIALS RESEARCH BULLETIN, 1982, 17 (03) :391-397

[4]

BULOU A, 1982, J PHYS C SOLID STATE, V15, P183, DOI 10.1088/0022-3719/15/2/004

[5] STRUCTURAL PHASE-TRANSITIONS IN FERROELASTIC TLALF4 - DSC INVESTIGATIONS AND STRUCTURES DETERMINATIONS BY NEUTRON POWDER PROFILE REFINEMENT [J].

BULOU, A ;

NOUET, J .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1987, 20 (19) :2885-2900

[6] CHOICE OF COLLIMATORS FOR A CRYSTAL SPECTROMETER FOR NEUTRON DIFFRACTION [J].

CAGLIOTI, G ;

PAOLETTI, A ;

RICCI, FP .

NUCLEAR INSTRUMENTS & METHODS, 1958, 3 (04) :223-228

[7] THE ELECTRON-MICROSCOPIC OBSERVATION OF PHASE-TRANSITIONS IN KFEF4, RBFEF4, AND RBVF4 [J].

DEBLIECK, R ;

VANLANDUYT, J ;

AMELINCKX, S .

JOURNAL OF SOLID STATE CHEMISTRY, 1985, 59 (03) :379-387

[8] A REINVESTIGATION OF THE ROOM-TEMPERATURE PHASE OF KAIF4 - EVIDENCE OF ANTIPHASE DOMAINS [J].

GIBAUD, A ;

LEBAIL, A ;

BULOU, A .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1986, 19 (24) :4623-4633

[9] SIMPLE WAYS OF DETERMINING PEROVSKITE STRUCTURES [J].

GLAZER, AM .

ACTA CRYSTALLOGRAPHICA SECTION A, 1975, 31 (NOV1) :756-762

[10]

HAMILTON WC, 1964, STATISTICS PHYSICAL

← 1 2 →