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Vibrational spectra of and phase transitions in caesium hydrogen sulphate
Author(s) -
PhamThi M.,
Colomban Ph.,
Novak A.,
Blinc R.
Publication year - 1987
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.1250180308
Subject(s) - raman spectroscopy , caesium , chemistry , infrared , phase transition , infrared spectroscopy , hydrogen bond , phase (matter) , spectral line , atmospheric temperature range , reflection (computer programming) , crystal (programming language) , crystallography , molecular physics , molecule , condensed matter physics , inorganic chemistry , optics , thermodynamics , physics , organic chemistry , astronomy , computer science , programming language
The Raman and infrared spectra of the superionic protonic conductor CsHSO 4 (CsDSO 4 ) were investigated in the 18–450 K range. Polarized single crystal Raman and infrared reflection spectra were also studied at room temperature. An assignment of bands due to internal and external vibrations is given in terms of symmetry species and approximate type of motion. The spectroscopic results, in particular the behaviour of the Raman bands as a function of temperature, are used to discuss the crystalline structures of various phases, hydrogen bonding, the type and degree of structural disorder, phase transitions and conductivity.