High-Pressure Micro-Raman Spectra of Potassium Chromate(VI) and Potassium Tungstate(VI)

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The effects of high external pressures on the micro-Raman spectra of potassium chromate, K2CrO4, and potassium tungstate, K2WO4, have been investigated for pressures approaching 45 kbar. There is no evidence for a pressure-induced phase transition in the chromate, but there is clearly such a transition at ~13 kbar in the tungstate. The pressure sensitivities of the principal bands observed in the spectra of the two salts have been determined. The values obtained are comparable to those reported for simple spinels and somewhat larger than those for scheelites.

Keywords: High pressure; Raman spectroscopy

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/000370290789619513

Affiliations: Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, Quebec H3A 2K6, Canada

Publication date: September 1, 1990

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