Premium
A study of phase transition in (NH 4 ) 3 WO 3 F 3 oxyfluoride by Raman scattering
Author(s) -
Krylov A. S.,
Gerasimova J. V.,
Vtyurin A. N.,
Fokina V. D.,
Laptash N. M.,
Voyt E. I.
Publication year - 2006
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200541259
Subject(s) - octahedron , raman scattering , raman spectroscopy , phase transition , ion , perovskite (structure) , materials science , crystallography , phase (matter) , scattering , condensed matter physics , analytical chemistry (journal) , chemistry , crystal structure , physics , optics , organic chemistry , chromatography
Raman scattering spectra of perovskite‐like (NH 4 ) 3 WO 3 F 3 oxyfluoride are studied in the 70–3600 cm –1 frequency range and the 93–323 K temperature range including the transition point from orientationally disordered cubic phase into the lower symmetry one. Internal vibrations of ammonium ions and WO 3 F 3 octahedra have been found to exhibit transition anomalies. Analysis of measurements suggests that the transition under study is due mainly to the ordering of octahedra. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)