Raman study of anatase (TiO2) at high pressure
Authors:
- 1 May 1989
- journal article
- research article
- Published by Taylor & Francis in High Pressure Research
- Vol. 1 (3) , 185-191
Abstract
The Raman spectra of anatase have been investigated under pressure up to 17 GPa and at room temperature. The pressure dependences of the Raman active modes are reported. A pressure-induced phase transition of anatase is observed at pressure above 7.1 GPa in the hydrostatic environment using a 4 :1 mixture of methanol and ethanol as pressure medium. On the basis of in situ powder X-ray diffraction data and comparison of the Raman spectrum of the high-pressure modification with that of TiO2, -II (a-PbO2, -type structure), it is evident that at high pressure anatase transforms irreversibly to Ti PbO2, -II.Keywords
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