Polarized Raman spectra of KIO4 and RbIO4 and high-pressure Raman studies on KIO4

Polarized Raman spectra of single crystals of KIO4 and RbIO4 were obtained. The observed fundamental modes satisfy the selection rules valid for the scheelite structure. The pressure dependence of the Raman spectra of KIO4, which was investigated up to 12 Gpa, reveals a structural phase transition i...

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Veröffentlicht in:	Journal of Raman spectroscopy 1991-10, Vol.22 (10), p.567-571
Hauptverfasser:	Al Dhahir, T. A., Bhat, H. L., Narayanan, P. S., Jayaraman, A.
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: structure, mechanical and thermal properties Crystalline state (including molecular motions in solids) Crystallographic aspects of phase transformations pressure effects Exact sciences and technology Physics Structure of solids and liquids crystallography
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Zusammenfassung:	Polarized Raman spectra of single crystals of KIO4 and RbIO4 were obtained. The observed fundamental modes satisfy the selection rules valid for the scheelite structure. The pressure dependence of the Raman spectra of KIO4, 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.
ISSN:	0377-0486 1097-4555
DOI:	10.1002/jrs.1250221005