High pressure Raman scattering study on the phase stability of LuVO4

High pressure Raman spectroscopic investigations have been carried out on rare earth orthovanadate LuVO4 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 ↔ fergusonite transition. Pressure dependencies of the Raman active modes in the zircon and the scheelite phases are reported.

Study of scheelite–fergusonite transition in RVO4 by Raman spectroscopy is rare. Here we report Raman spectroscopic investigations of LuVO4 at high pressure to obtain insight into nature of post-scheelite phases.Figure optionsDownload as PowerPoint slide