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Elsevier, Geochimica et Cosmochimica Acta, 17(65), p. 2949-2964, 2001

DOI: 10.1016/s0016-7037(01)00623-8

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Structural implications of water dissolution in haplogranitic glasses from NMR spectroscopy: Influence of total water content and mixed alkali effect

Journal article published in 2001 by B. C. Schmidt, T. Riemer, S. C. Kohn ORCID, F. Holtz, R. Dupree ORCID
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This paper is available in a repository.

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Abstract

To study the effects of total water content and alkali substitution on the structure of aluminosilicate glasses, two series of glasses belonging to the ternary system Quartz (Qz)-Albite (Ab)-Orthoclase (Or) were synthesized and investigated with nuclear magnetic resonance (NMR) spectroscopy. Series I consisted of seven glasses with normative composition Ab39Or32Qz29 (AOQ) and water contents ranging from 0 to 6 wt%. Series II consisted of dry and hydrous glasses (∼2.0 wt% H2O) with five compositions along the join Qz37Ab63-Qz34Or66 (AQ-OQ) varying the alkali content (Na/K) at constant Si/Al ratio. All glasses were investigated with 1H, 23Na, 27Al and 29Si magic angle spinning (MAS) NMR.