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Raman Studies of Molecular Crystals at High Pressures. I. Tribromofluoromethane
Author(s) -
Zhou W. S.,
Yenice K. M.,
Lee S. A.,
Anderson A.
Publication year - 1996
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/(sici)1097-4555(199601)27:1<9::aid-jrs915>3.0.co;2-c
Subject(s) - raman spectroscopy , wavenumber , raman scattering , phase transition , normal mode , chemistry , molecular vibration , phase (matter) , lattice (music) , materials science , molecular physics , crystallography , analytical chemistry (journal) , vibration , optics , condensed matter physics , physics , organic chemistry , chromatography , quantum mechanics , acoustics
The vibrations of solid tribromofluoromethane were studied by Raman scattering at room temperature and up to pressures of about 9 GPa. Changes in the low‐wavenumber region of the Raman spectra reveal that freezing occurs near 1.0 GPa and that a solid‐state phase transition occurs near 1.8 GPa. All of the internal modes are found to display splitting at elevated pressures, although only two modes (the CBr 3 asymmetric stretch ν 4 and the CF stretch ν 1 ) display splitting at the lowest pressures of the solid phase. The wavenumbers of the lattice and internal modes increase with applied pressure, except for the CF stretch mode ν 1 , which decreases uniformly as the pressure increases.