High-resolution magic-angle sample-spinning (MASS) 27Al and 29Si NMR spectroscopic data for glasses and crystals along the join: CaMgSi2O6-CaAl2SiO6(Di-CaTs) are presented and analysed. The results indicate that the glasses become increasingly polymerized with increasing CaTs content, that CaTs glass is fully polymerized, and that the lack of variation in the 29Si chemical shift is due to the opposing effects of increasing polymerization, which increases shielding, and the increasing number of Al next-nearest neighbours, which decreases the shielding.-J.A.Z.
|Original language||English (US)|
|Number of pages||7|
|State||Published - Jan 1 1986|
ASJC Scopus subject areas
- Geochemistry and Petrology