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Pressure-induced structural changes in ?-MoO3 probed by X-ray absorption spectroscopy
- Source :
- IOP Conference Series: Materials Science and Engineering; March 2019, Vol. 503 Issue: 1 p012018-012018, 1p
- Publication Year :
- 2019
-
Abstract
- Energy-dispersive X-ray absorption spectroscopy at the Mo K-edge was used to study pressure-induced (up to 36 GPa) changes in the local atomic structure of 2D layered oxide a-MoO3. A linear combination analysis based on the low and high-pressure X-ray absorption near edge structure (XANES) spectra shows clear evidence of two high-pressure phases, existing at 18-25 GPa and above 32 GPa. The first transition is due to gradual decrease of the interlayer gap, whereas the second one - to its collapse and oxide structure reconstruction. The local atomic structure around molybdenum atoms at 0.2, 18.5 and 35.6 GPa was determined from the extended X-ray absorption fine structure (EXAFS) using reverse Monte Carlo calculations.
Details
- Language :
- English
- ISSN :
- 17578981 and 1757899X
- Volume :
- 503
- Issue :
- 1
- Database :
- Supplemental Index
- Journal :
- IOP Conference Series: Materials Science and Engineering
- Publication Type :
- Periodical
- Accession number :
- ejs49636482