Lattice dynamics of zircon-type NdVOand scheelite-type PrVOunder high-pressure.

Zircon-type NdVOand scheelite-type PrVOhave been studied by means of Raman spectroscopy up to approximately 20 GPa. In the first compound, zircon-scheelite and scheelite-fergusonite phase transitions are reported at 6.4(3) and 19.