A study of the structural role of water in hydrous silica glass using cross-polarisation magic angle spinning NMR

Details A study of the structural role of water in hydrous silica glass using cross-polarisation magic angle spinning NMR A study of the structural role of water in hydrous silica glass using cross-polarisation magic angle spinning NMR

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987gecoa..51.2869f&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 51, Issue 10, pp.2869-2873

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Hydrous silica glasses containing 2.5 wt.% and 8.7 wt.% H 2 O were prepared by quenching melts from high pressures and temperatures, and investigated by 29 Si NMR. Cross-polarisation magic angle spinning NMR experiments are described and used to identify silicon in different structural units within the glasses. The relative amounts of each structural unit are obtained by quantitative single pulse MASNMR and used together with the known water content to give the extent of hydroxyl formation. The hydroxyl concentration appears to be lower than that suggested by most previous work on hydrous silicate glasses using other experimental techniques.

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