MAS NMR studies of ternary silicate glasses

Prabakar, S. ; Rao, K. J. (1991) MAS NMR studies of ternary silicate glasses Philosophical Magazine Part B, 64 (4). pp. 401-411. ISSN 0958-6644

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A series of silicate glasses based on PbO-B2O3-SiO2, PbO-Al2O3-SiO, Bi2O3-Al2O3-SiO2 and PbO-PbF2-SiO2 have been studied using solid-state magic-angle-spinning (MAS) NMR of 29Si, 27Al and 11B nuclei. Al is found to be always four-coordinated in all these glasses. Si is present mostly as Q2 or Q3. Four-coordinated boron dominates the 11B spectra. Calculated partial charges on Al, Si and B have been used to provide a rationale for the observed spectral features.

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