Abstract
X-ray absorption near edge structure (XANES) spectra, at the Na and Al K-edge, have been measured for Ca-Na aluminosilicate glasses. This allows a determination of the local cationic sites corresponding to 6–8 oxygen neighbours in a distorted first shell for Na and to 4 oxygen neighbours for Al. The Al XANES spectra show a strong dependence on the medium range organisation of the polymeric network.
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