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Progress in Earth and Planetary Science
Fig. 5 | Progress in Earth and Planetary Science

Fig. 5

From: Water and magmas: insights about the water solution mechanisms in alkali silicate melts from infrared, Raman, and 29Si solid-state NMR spectroscopies

Fig. 5

Top: 29Si single-pulse MAS (5 kHz) NMR spectra of the anhydrous and 17.6 nom. mol % H2O LS4 (left), NS4 (middle), and KS4 (right) glasses. Intensities on spectra are normalized such that the total areas of the spectra are equal to unity. Changes in relative intensity and areas are thus directly proportional to the changes in the chemical concentrations of 29Si in particular Q n species. Bottom: residuals from the subtraction of the 29Si NMR signals from hydrous glasses minus those from anhydrous glasses. Areas under the positive and negative peaks are quantitative and represent the fraction of transformed Q n species upon hydration

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