Local structures in high pressure phases of V{sub 2}O{sub 5}
- Ecole Normale Superieure de Lyon (France)
The high-pressure behavior of layered V{sub 2}O{sub 5} is investigated using in situ Raman spectroscopy in a diamond anvil cell. Upon compression, the mode associated with the vanadyl V{double_bond}O double bond at 997 cm{sup {minus}1} softens and vanishes at about 10 GPa. Above 7 GPa, additional modes appear in the V{single_bond}O stretching region, at lower wavenumbers than the V{double_bond}O stretching oscillation. Such a behavior is interpreted as a pressure-induced five-to-six coordination change around the V{sup 5+} cations, leading to a three-dimensional V{sub 2}O{sub 5} lattice. Upon decompression, intermediate phases are recovered.
- OSTI ID:
- 669764
- Journal Information:
- Chemistry of Materials, Journal Name: Chemistry of Materials Journal Issue: 9 Vol. 10; ISSN CMATEX; ISSN 0897-4756
- Country of Publication:
- United States
- Language:
- English
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