In situ high-pressure synchrotron x-ray diffraction study of CeVO4 and TbVO4 up to 50 GPa

Abstract

Room temperature angle-dispersive x-ray diffraction measurements on zircon-type TbVO4 and CeVO4 were performed in a diamond-anvil cell up to 50 GPa using neon as pressure-transmitting medium. In TbVO4 we found at 6.4 GPa evidence of a non-reversible pressure-induced structural phase transition from zircon to a scheelite-type structure. A second transition to an M-fergusonite-type structure was found at 33.9 GPa, which is reversible. Zircon-type CeVO4 exhibits two pressure-induced transitions. First an irreversible transition to a monazite-type structure at 5.6 GPa and second at 14.7 GPa a reversible transition to an orthorhombic structure. No additional phase transitions or evidences of chemical decomposition are found in the experiments. The equations of state and axial compressibility for the different phases are also determined. Finally, the sequence of structural transitions and the compressibilities are discussed in comparison with other orhtovanadates and the influence of non-hydrostaticity commented.

28 pages, 6 figures, 38 references

References in corpus (8)

• Restoring the density-gradient expansion for exchange in solids and surfaces
• Generalized gradient approximation for solids and their surfaces
• Pressure effects on the structural and electronic properties of ABX4 scintillating crystals
• Effects of high pressure on the optical absorption spectrum of scintillating PbWO4 crystals
• Landau theory applied to phase transitions in calcium orthotungstate and isostructural compounds
• Hall-effect and resistivity measurements in CdTe and ZnTe at high pressure: Electronic structure of impurities in the zincblende phase and the semi-metallic or metallic character of the high-pressure phases
• Experimental and theoretical study of structural properties and phase transitions in YAsO4 and YCrO4
• New high-pressure phase of HfTiO4 and ZrTiO4 ceramics

Cited by in corpus (8)

• The electronic structure of zircon-type orthovanadates: Effects of high-pressure and cation substitution
• Recent progress on the characterization of the high-pressure behaviour of AVO4 orthovanadates
• High-pressure powder x-ray diffraction study of EuVO4
• Pressure-induced phase transformation in zircon-type orthovanadate SmVO4 from experiment and theory
• First-Principles Study of InVO4 under Pressure: Phase Transitions from CrVO4- to AgMnO4-Type Structure
• High-pressure characterization of multifunctional CrVO4
• PrVO${}_4$ under High Pressure: Effects on Structural, Optical and Electrical Properties
• Structural phase transition and its consequences on optical behavior of LaV${}_{1-x}$Nb${}_x$O${}_4$