High pressure behavior of Sr{sub 3}(VO{sub 4}){sub 2} and Ba{sub 3}(VO{sub 4}){sub 2}
Journal Article
·
· Journal of Solid State Chemistry
- Arizona State Univ., Lyon (France)
We have studied pressure-induced transitions and structural changes in isostructural strontium and barium orthovanadates, Sr{sub 3}(VO{sub 4}){sub 2} and Ba{sub 3}(VO{sub 4}){sub 2}, via Raman spectroscopy. The spectral changes in Ba{sub 3}(VO{sub 4}){sub 2} can be interpreted as being due to condensation of VO{sub 4}{sup 3-} units into edge- or corner-shared octahedra with little or no hysteresis on decompression. For Sr{sub 3}(VO{sub 4}){sub 2}, there is a pressure-induced first-order phase change at about 150 kbar, with large hysteresis on decompression, which can be rationalized as a transition into a spinelloid series of structures, retaining the tetrahedral coordination of the V atoms.
- OSTI ID:
- 567604
- Journal Information:
- Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 1 Vol. 132; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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