1990•High Pressure ResearchRequires access
Coordination changes in crystalline and vitreous GeO2
J. P. Itié, A. Polian, Georges Calas, Jacqueline Petiau, A. Fontaine, Helio Cesar Nogueira Tolentino
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Abstract
High pressure x ray absorption spectroscopy (XAS) has been performed up to 29 GPa on crystalline and amorphous GeO2. The modification of the x ray absorption near edge structure (XANES) as well as the variation of the Ge-O distance, indicate that the coordination of Ge changes from 4 to 6 above 6.5 GPa. The transition is confirmed by Raman spectroscopy.