Free Access
| Issue |
J. Phys. IV France
Volume 11, Number PR10, Décembre 2001
Journées d'Étude des Équilibres entre Phases
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| Page(s) | Pr10-57 - Pr10-62 | |
| DOI | https://doi.org/10.1051/jp4:20011007 | |
Journées d'Étude des Équilibres entre Phases
J. Phys. IV France 11 (2001) Pr10-57-Pr10-62
DOI: 10.1051/jp4:20011007
1 LEPMI, CNRS INPG, 1130 rue de la Piscine, BP. 75, 38402 Saint-Martin-d'Hères cedex, France
2 Chemistry Department, Moscow State University, Moscow 119899, Russia
© EDP Sciences 2001
J. Phys. IV France 11 (2001) Pr10-57-Pr10-62
DOI: 10.1051/jp4:20011007
High-pressure study of microcrystalline tungsten trioxide phase transitions by Raman spectroscopy
M. Boulova1, 2, G. Lucazeau1, T. Pagnier1 and A. Gaskov21 LEPMI, CNRS INPG, 1130 rue de la Piscine, BP. 75, 38402 Saint-Martin-d'Hères cedex, France
2 Chemistry Department, Moscow State University, Moscow 119899, Russia
Abstract
A high-pressure Raman study of microcrystalline tungsten oxide was performed in the 0.1 MPa-31 GPa pressure range under isostatic and non-isostatic conditions. The phase transitions, which take place below 0.1 GPa and at 22 GPa are first order, while two further structural changes, observed at about 3 and 10 GPa, are diffuse. Surprisingly, the non-isostatic conditions do not induce inhomogeneous band broadenings and do not modify the transitions sequence observed in isostatic conditions. Compressibility of the different phases is estimated from spectral data.
© EDP Sciences 2001