Exploring the properties of MTO₄ compounds using high‐pressure powder x‐ray diffraction

Abstract

Several ternary oxides with industrial applications, but also interesting for basic research, have been studied recently at room temperature under high-pressure conditions using synchrotron powder x-ray diffraction. In this article, part of these experiments will be summarized. The studied materials include zircon-type vanadates and scheelitetype tungstates as well as other oxides related to them. Several pressure-induced structural phase transitions that take place in these compounds under compression will be here described. In addition, the determination of the crystal structure of the high-pressure phases will be discussed. The reported studies have also allowed the accurate determination of the axial and bulk compressibility of the studied materials. The influence of experimental conditions on the reported results will be finally commented.

Exploring the coordination change of vanadium and structure transformation of metavanadate MgV2O6 under high pressure

“…In addition, both spectral (16:3:1 methanol/ethanol/water mixture) and electrical (without any pressure medium) results gave similar phase transition pressures, indicating that the deviatoric stresses has no effect on the structural phase transition in MgV 2 O 6 . Unlike the situation occurred in BaWO 4 that the deviatoric stresses play an important role in its structural phase transition behavior54.…”

High-pressure behavior ofCaMoO4

“…Special caution was taken during the sample loading to avoid sample bridging between the diamond anvils [35,36]. Pressure was determined using the ruby scale [37].…”

Copper Delafossites under High Pressure—A Brief Review of XRD and Raman Spectroscopic Studies

“…Research on thin films of delafossite is another interesting and widely investigated area for their potential uses in optoelectronic device fabrication [29][30][31][32]. As has been well established by the high pressure scientific community, compression is yet another way to engineer the crystal/electronic structure of materials, producing compounds with entirely different set of physical properties without altering their chemical composition [33,34]. The focus of the present article is to comprehend the high pressure studies on delafossite structured compounds till date in general, with special emphasis on their X-ray diffraction and Raman spectroscopic investigations.…”