Quantification of the disorder in network-modified silicate glasses. |
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| Authors: | I Farnan P J Grandinetti J H Baltisberger J F Stebbins U Werner M A Eastman A Pines |
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| Affiliation: | Department of Geology, Stanford University, California 94305. |
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| Abstract: | Local order in silicate glasses has been observed by many experimental techniques to be similar to that in crystalline materials. Details of the intermediate-range order are more elusive, but essential for understanding the lack of long-range symmetry in glasses and the effect of composition on glass structure. Two-dimensional 17O dynamic-angle-spinning nuclear magnetic resonance experiments reveal intermediate-range order in the distribution of inter-tetrahedral (Si-O-Si) bond angles and a high degree of order in the disposition of oxygen atoms around the network-modifying cations. |
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