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High-resolution 2esi NMR study of silicate and aluminosilicate glasses: the effect of network-modifying cations
| Content Provider | Semantic Scholar |
|---|---|
| Author | Mr, Boocock Ns, F. Srsssr |
| Copyright Year | 1985 |
| Abstract | The effect of network-modifflng alkali and alkaline-earth cations on the degree of polymerization in silicate glasses is investigated using 2eSi magic-angle spining NMR. The NMR linewidth is found to increase (reflecting a broader range of silicate environments) as the polarizing power of the cation increases. A similar effect occurs in three-dimensional framework aluminosilicate glasses: smaller, more highly charged cations create greater variety in the distribution of silicate and aluminate tetrahedra. Linewidths as a function of the siliconto-aluminum ratio suggest, however, that Loewenstein's aluminum avoidance principle is largely obeyed. Spectra of three natural silicic glasses are analyzed in terms of the Si/Al ratio and the concentration of paramagnetic species. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://rruff.info/doclib/am/vol70/AM70_332.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
