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Structural phase transitions in [(C 2 H 5 ) 4 N] 2 SiF 6 : differential scanning calorimetry and Raman studies
Author(s) -
Ouasri A.,
Rhandour A.,
Dhamelincourt M.C.,
Dhamelincourt P.,
Mazzah A.,
Taibi M.
Publication year - 2002
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.902
Subject(s) - differential scanning calorimetry , raman spectroscopy , phase transition , chemistry , phase (matter) , analytical chemistry (journal) , calorimetry , tetraethylammonium , molecular vibration , crystallography , physics , optics , condensed matter physics , organic chemistry , thermodynamics , potassium
Three structural phase transitions were observed for a new tetraethylammonium compound, [(C 2 H 5 ) 4 N] 2 SiF 6 , by means of differential scanning calorimetry. The internal vibrational modes of the [(C 2 H 5 ) 4 N] 2 SiF 6 compound were studied at ambient temperature and through the phase transitions with the use of Raman spectroscopy. It was concluded that the observed phase transitions are associated with the dynamics of the system and are of the order–disorder type. Copyright © 2002 John Wiley & Sons, Ltd.