Raman Spectroscopy of SiGlass at High Pressure
- 11 August 1986
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 57 (6) , 747-750
- https://doi.org/10.1103/physrevlett.57.747
Abstract
A new technique has been developed for optical studies of amorphous solids to very high pressures. Raman spectra of Si glass measured at 8 GPa indicate a significant reduction in the width of the Si-O-Si angle distribution, which has been associated with a number of anomalous properties of silica glass under ambient conditions. Between 8 and ∼ 30 GPa irreversible changes in the Raman spectrum occur that are consistent with a shift in ring statistics in densified glass. The spectra suggest a breakdown in intermediate-range order at higher pressure.
Keywords
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