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Updated: Oct 17, 2025
Synthesis and Microdiffraction at Extreme Pressures and Temperatures
Published on: October 7, 2013
Lattice dynamics of zircon-type NdVO4and scheelite-type PrVO4under high-pressure
T Marqueño1, J Pellicer-Porres1, D Errandonea1
1Departamento de Física Aplicada-ICMUV, Universidad de Valencia, Dr. Moliner 50, Burjassot, 46100 Valencia, Spain.
Abstract:
Zircon-type NdVO4and scheelite-type PrVO4have 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 19.6(4) GPa, respectively. In the case of scheelite-type PrVO4, a reversible phase transition to a PbWO4-III structure is observed at 16.8(5) GPa. In both cases, a scheelite-type structure is recovered in a metastable state at low pressures. The pressure evolution of the Raman modes is also reported. Our experimental findings are supported byab initiocalculations, which allowed us to discuss the role of mechanic and dynamical instabilities in the phase transition mechanisms.
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