High pressure Raman study of BaMoO 4 | Zendy

Christofilos D. | Zendy; Arvanitidis J. | Zendy; Kampasakali E. | Zendy; Papagelis K. | Zendy; Ves S. | Zendy; Kourouklis G. A. | Zendy

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High pressure Raman study of BaMoO 4

Author(s) -

Christofilos D.,

Arvanitidis J.,

Kampasakali E.,

Papagelis K.,

Ves S.,

Kourouklis G. A.

Publication year - 2004

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.200405234

Subject(s) - raman spectroscopy , scheelite , hydrostatic pressure , crystallite , phase transition , phase (matter) , materials science , ambient pressure , hysteresis , chemistry , crystallography , optics , condensed matter physics , physics , thermodynamics , metallurgy , organic chemistry , tungsten

The structural stability of polycrystalline BaMoO 4 under hydrostatic pressure has been investigated by means of Raman spectroscopy up to 8 GPa. Raman spectra reveal a pressure induced phase transition at ∼5.8 GPa. Upon pressure release the structure reverts to its ambient pressure scheelite (CaWO 4 ) structure with no observable hysteresis. The large number of Raman active modes of the high pressure phase suggests either an increase of the size of the unit cell and/or a non‐centrosymmetric structure leading to the activation of the ungerade modes of the scheelite structure. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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