High pressure Raman scattering study on the phase stability of LuVO{sub 4}

High pressure Raman spectroscopic investigations have been carried out on rare earth orthovanadate LuVO{sub 4} upto 26 GPa. Changes in the Raman spectrum around 8 GPa across the reported zircon to scheelite transition are investigated in detail and compared with those observed in other vanadates. Co...

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Bibliographic Details
Published in:Journal of solid state chemistry 2009-07, Vol.182 (7)
Main Authors: Rao, Rekha, Garg, Alka B., Sakuntala, T., Achary, S.N., Tyagi, A.K.
Format: Article
Language:English
Subjects:
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
LASER SPECTROSCOPY
LUTETIUM COMPOUNDS
MINERALS
OXYGEN COMPOUNDS
PHASE STABILITY
PHASE TRANSFORMATIONS
PRESSURE RANGE
PRESSURE RANGE GIGA PA
PRESSURE RELEASE
RAMAN EFFECT
RAMAN SPECTRA
RAMAN SPECTROSCOPY
RARE EARTH COMPOUNDS
SILICATE MINERALS
SPECTRA
SPECTROSCOPY
STABILITY
TRANSITION ELEMENT COMPOUNDS
VANADATES
VANADIUM COMPOUNDS
ZIRCON
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Summary:High pressure Raman spectroscopic investigations have been carried out on rare earth orthovanadate LuVO{sub 4} upto 26 GPa. Changes in the Raman spectrum around 8 GPa across the reported zircon to scheelite transition are investigated in detail and compared with those observed in other vanadates. Co-existence of the zircon and scheelite phases is observed over a pressure range of about 8-13 GPa. The zircon to scheelite transition is irreversible upon pressure release. Subtle changes are observed in the Raman spectrum above 16 GPa which could be related to scheelite reversible fergusonite transition. Pressure dependencies of the Raman active modes in the zircon and the scheelite phases are reported. - Graphical abstract: Study of scheelite-fergusonite transition in RVO{sub 4} by Raman spectroscopy is rare. Here we report Raman spectroscopic investigations of LuVO{sub 4} at high pressure to obtain insight into nature of post-scheelite phases.
ISSN:0022-4596
1095-726X
DOI:10.1016/j.jssc.2009.05.003