High resolution 29Si NMR study of the structure and devitrification of lead-silicate glasses |
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| Authors: | E. Lippmaa A. Samoson M. Mägi R. Teeäär J. Schraml J. Götz |
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| Affiliation: | Institute of Chemical Physics and Biophysics of the Estonian Academy of Sciences, 200001 Tallinn, USSR;Institute of Chemical Process Fundamentals of the Czechoslovak Academy of Sciences, 165 02 Prague, Czechoslovakia;Joint Laboratory for Silicate Research of the Czechoslovak Academy of Sciences and the Institute of Chemical Technology, 166 28 Prague, Czechoslovakia |
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| Abstract: | High speed magic-angle rotation of glass samples in the strong polarizing field of a superconducting magnet yields high-resolution 29Si NMR spectra. Using this technique glasses of various composition, PbO·SiO2, (PbO)2·SiO2, and (PbO)4·SiO2 were studied and the influence of thermal treatment followed. Crystallization of PbO·SiO2 glass has been found to be a complex process leading to a structure identical with that of the mineral alamosite. The 29Si NMR spectrum of crystalline alamosite consists of three lines in agreement with the structure determined by X-ray diffraction. |
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