A high-pressure Raman study of yttrium vanadate (YVO4) and the pressure-induced transition from the zircon-type to the scheelite-type structure

Pressure-induced amorphization of YVO4:Eu3+nanoboxes

“…6 we show a selection of Raman spectra of YVO 4 :Eu 3+ nanoboxes at different pressures up to 19.8 GPa. At low pressure, we can see 9 out of 12 first-order Raman active modes of zircon-type YVO 4 in good agreement with previous Raman spectroscopy measurements on the bulk [14,16]. Additionally, we also see two extra broad bands highlighted by asterisks which shift fast with pressure and whose origin is tentatively assigned to secondorder Raman modes.…”

“…Under high pressure bulk YVO 4 undergoes a structural phase transition to a scheelite-type structure at 7.5 GPa [14][15][16] as most zircon compounds. However, what happens to their nanocrystals is still unknown.…”

Yttrium, Lanthanide and Mixed Y‐Ln Vanadates Prepared from Molecular Precursors Based on EDTA

“…The position of the Raman bands observed is in accordance with the literature [22,23] and the results obtained for YVO 4 and EuVO 4 as well as their symmetry designation are presented in 4 group with respect to the Y ion). According to the literature, [22] the internal B g mode and the external E g mode are degenerated in YVO 4 but can be easily distinguished in LnVO 4 (see Figure 6). [22] for YVO 4 and EuVO 4 prepared by the molecular precursor method.…”

The effect of pressure on the structural and electronic properties of yttrium orthovanadate YVO4 compound: total-energy calculations

“…So there is a renewed interest in the study of the phase transition behavior of these systems. Among the extensively investigated systems of this family are orthovanadates [1], and most of these compounds crystallize either in the zircon-type [space group I4 1 /amd, Z ¼ 4] or the scheelite-type structure [space group I4 1 /a, Z ¼ 4] at ambient conditions. Yttrium orthovanadate YVO 4 crystallizes in the zircon-type structure at ambient conditions.…”

“…The high pressure properties of similar compounds are interesting since at moderate pressures (8 GPa) the zircon-type structure transforms to a denser scheelite-type phase [1,[11][12][13][14], irreversibly whereas at lower temperatures 40 K some of orthovanadate family members transform to a lower symmetry structure via a cooperative Jahn-Teller transition [19]. The pressure dependences of the Raman active modes in yttrium orthovanadate YVO 4 crystallizing in the zircontype structure (I4 1 /amd), have been studied by Jayaraman et al [1] using a diamond anvil cell up to 15 GPa where they have shown that at room temperature the zircon-type structure transforms to the scheelite-type structure (I4 1 /a) with a ¼ 5.04 # A and c ¼ 11.24 # A near 7.5 GPa. The electronic structures of the zircon polymorph of YVO 4 have previously been reported both experimentally and computationally [20,21].…”