Synthesis, Lattice Dynamics, and Mechanical Properties of a High-Pressure Scheelite Phase of RVO₄

Abstract

High-pressure scheelite phases of RVO(4) (R = Y, Sm, Gd, Yb, Lu) compounds were prepared by high pressure (up to 25 GPa) from zircon RVO(4) compounds. Raman spectra of these scheelite phases of RVO(4) were determined and discussed in detail. Mechanical properties, including bulk, shear, Young's modulus, B/G and Poisson's ratios, of the scheelite phase of RVO(4) were measured by an ultrasonic method and compared with the results calculated by density functional theory. The calculated lattice parameters and mechanical properties are in good agreement with the experimental results. The radius and states of the 4f orbital of R show distinct effects on the mechanical properties.

Equation of state and electronic properties of EuVO4: A high-pressure experimental and computational study

“…Regarding other vanadates, a scheelite phase with a larger band-gap energy than that of the zircon phase in GdVO 4 has been reported in Ref. [66], while drops of 0.5 and ~0.4 eV have been found for the zircon-to-monazite transitions in NdVO 4 [24] and LaVO 4 [25], respectively. In Ref.…”

High-pressure powder x-ray diffraction study of EuVO4

“…The same can be stated for the crystal structure of the second HP phase. The crystal structure of the scheelite-type structures of vanadates has been calculated for isostructural compounds [10,31] but not for EuVO 4 .…”

High-Pressure High-Temperature Stability and Thermal Equation of State of Zircon-Type Erbium Vanadate

“…Results and discussiona. Ambient temperature stability and compressibility of zircon and scheelite-type ErVO4The evolution of the powder XRD patterns of zircon-type ErVO4 up to 15.5(2) GPa and the change of the XRD reflections of a single-crystal collected with a 20º ω-scan at 8.1(1) and 9.0(1) GPa are shown inFig. 2.…”