Published October 20, 2004 | Version v1
Journal article Metadata-only

Crystalline structure of SrAlF5 investigated by vibrational spectroscopy

Creators

  • 1. Departamento de FIsica, Universidade Federal do Ceara, Caixa Postal 6030, 60451-900, Fortaleza, Ceara (Brazil)
  • 2. Departamento de FIsica, ICEx, Universidade Federal de Minas Gerais, Caixa Postal 702, 30123-970, Belo Horizonte (Madagascar), Brazil
  • 3. Universite du Maine-Cristallogenese, UMR 6087, 72085 Le Mans Cedex 9 (France)

Description

SrAlF5 has been considered as one of the rare fluoride ferroelectric crystals, belonging to the polar I group. However, recent x-ray diffraction data suggest that the correct structure is centrosymmetric (I41/a). Since ferroelectricity is forbidden in this structure, the existence of an inversion centre was investigated by vibrational spectroscopy. Thus, measurements on SrAlF5 single crystals have been made by polarized Raman scattering and infrared reflectance spectroscopy. The results, discussed on the basis of the factor group analysis of the proposed structures and other members of the ABF5 family, favour a centrosymmetric structure

Availability note (English)

Available online at http://stacks.iop.org/0953-8984/16/7511/cm4_41_028.pdf or at the Web site for the Journal of Physics. Condensed Matter (ISSN 1361-648X) http://www.iop.org/

Additional details

Identifiers

URL
http://stacks.iop.org/0953-8984/16/7511/cm4_41_028.pdf; http://www.iop.org/;
DOI
10.1088/0953-8984/16/41/028;
PII
S0953-8984(04)84379-0;

Publishing Information

Journal Title
Journal of Physics. Condensed Matter
Journal Volume
16
Journal Issue
41
Journal Page Range
p. 7511-7520
ISSN
0953-8984
CODEN
JCOMEL

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
36033885
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S36: MATERIALS SCIENCE;
Descriptors DEI
ALUMINIUM FLUORIDES; FERROELECTRIC MATERIALS; MONOCRYSTALS; RAMAN EFFECT; SPECTROSCOPY; STRONTIUM COMPOUNDS; TETRAGONAL LATTICES; X-RAY DIFFRACTION
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; ALUMINIUM COMPOUNDS; COHERENT SCATTERING; CRYSTAL LATTICES; CRYSTAL STRUCTURE; CRYSTALS; DIELECTRIC MATERIALS; DIFFRACTION; FLUORIDES; FLUORINE COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; MATERIALS; SCATTERING