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Polarized Raman spectra of KIO 4 and RbIO 4 and high‐pressure Raman studies on KIO 4
Author(s) -
Al Dhahir T. A.,
Bhat H. L.,
Narayanan P. S.,
Jayaraman A.
Publication year - 1991
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.1250221005
Subject(s) - raman spectroscopy , scheelite , chemistry , spectral line , analytical chemistry (journal) , high pressure , raman scattering , phase (matter) , phase transition , molecular physics , optics , physics , condensed matter physics , thermodynamics , chromatography , organic chemistry , astronomy , tungsten
Polarized Raman spectra of single crystals of KIO 4 and RbIO 4 were obtained. The observed fundamental modes satisfy the selection rules valid for the scheelite structure. The pressure dependence of the Raman spectra of KIO 4 , which was investigated up to 12 Gpa, reveals a structural phase transition in the crystal near 6.5 GPa, where new peaks are observed. Above 9.8 GPa only the peaks belonging to the high‐pressure phase exist.