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Raman spectra and structures of the high‐ and low‐temperature phases in the two‐dimensional layer‐type compound (CH 3 CH 2 NH 3 ) 2 SnCl 6
Author(s) -
Ben Ghozlen M. H.,
Daoud A.,
Mlik Y.,
Poulet H.,
Le Postollec M.,
Toupry N.
Publication year - 1985
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250160402
Subject(s) - raman spectroscopy , chemistry , atmospheric temperature range , ion , crystallography , spectral line , phase (matter) , phase transition , analytical chemistry (journal) , condensed matter physics , physics , optics , thermodynamics , organic chemistry , astronomy
Polarized Raman spectra of oriented single crystals of (CH 3 CH 2 NH 3 ) 2 SnCl 6 measured over the temperature range 15–300 K have been used to investigate the mechanism of the structural transition at 125 K. A detailed study of some of the external modes and of the internal modes of both the SnCl 6 2− and CH 3 CH 2 NH 3 + ions in the high‐ and low‐temperature phases has enabled the structure of the disordered high‐temperature phase to be confirmed and suggestions for the structure of the low‐temperature phase to be proposed.