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Effect of pressure on the Raman spectra of solids: 1—KC10 3
Author(s) -
Heyns A. M.,
Clark J. B.
Publication year - 1983
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.1250140510
Subject(s) - raman spectroscopy , chemistry , spectral line , lattice (music) , phase transition , diamond anvil cell , atmospheric temperature range , lattice vibration , phase (matter) , analytical chemistry (journal) , high pressure , thermodynamics , condensed matter physics , phonon , organic chemistry , optics , physics , astronomy , acoustics
The Raman spectra of KClO 3 are reported at room temperature up to pressures of 60 kbar in a diamond‐anvil cell. The phase transition between phases I and II occurs at approximately 7 kbar, is sluggish and the spectra show that the two phases coexist over a pressure range of approximately 5 kbar. The Raman spectra of phases I and II differ appreciably in the ClO stretching region and the spectra of KClO 3 II can be interpreted in terms of the predicted unimolecular rhombohedral cell which has no inversion centre. Mode Grüneisen parameters have been calculated for most of the modes observed and are used in an attempt to assign some of the lattice vibrations.