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Raman studies of orientational disorder in crystals: The hexamethylethane plastic phase, T> T c =152 K
Author(s) -
Gharbi H.,
Sauvajol J. L.,
Fontaine H.,
More M.
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.1250160203
Subject(s) - raman spectroscopy , libration (molecule) , plastic crystal , phase (matter) , chemistry , spectral line , molecular physics , crystallography , condensed matter physics , materials science , nuclear magnetic resonance , optics , physics , geometry , point (geometry) , mathematics , organic chemistry , astronomy
Raman spectra of some bands in the plastic phase of hexamethylethane have been recorded as a function of temperature. Interesting features related to the molecular reorientations and librations have been derived from the band shape analysis of F 2g and E g low‐frequency spectra. A novel temperature dependence of the libration width has been observed. The analysis of the internal modes' bandwidths at ν 1 = 878 cm −1 and ν 2 = 475 cm −1 provides consistent results for the monomolecular reorientational dynamics.