| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 4706015 | Geochimica et Cosmochimica Acta | 2007 | 15 Pages |
Abstract
Solution mechanisms of H2O were obtained by combining Raman and 29Si NMR spectroscopic data. Degree of melt depolymerization, NBO/T, increases with H2O content. The rate of NBO/T-change with H2O is negatively correlated with H2O and positively correlated with Al/(Al+Si). The main depolymerization reaction involves breakage of oxygen bridges in Q4-species to form Q2 species. Steric hindrance appears to restrict bonding of H+ with nonbridging oxygen in Q3 species. The presence of Al3+ does not affect the water solution mechanisms significantly.
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Authors
Bjorn O. Mysen,