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Table 4 ΔNBO/T, concentrations of total OH groups, SiOH, and unknown OH groups

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

  H2OTOT(Raman) [OH] ΔNBO/T (Raman) [SiOH] (Raman) [Unknown OH] (Raman) ΔNBO/T (NMR) [SiOH] (NMR) [Unknown OH] (NMR)
LS4 3.08 (60) 2.11 (35) 0.02 (5) 0.63 (1.25) 1.47 (3.41) - - -
10.09 (60) 4.56 (70) −0.05 (5) 0.00 (−) 4.56 (1.27) - - -
18.74 (60) 6.26 (94) −0.04 (5) 0.00 (−) 6.26 (1.57) 0.07 (1) 2.77 (16) 3.49 (95)
NS4 3.44 (67) 3.85 (40) 0.08 (5) 3.24 (66) 0.61 (77) - - -
9.46 (67) 7.35 (63) 0.13 (5) 5.02 (43) 2.33 (76) - - -
17.54 (67) 9.52 (80) 0.18 (5) 7.28 (30) 2.24 (85) 0.18 (1) 7.17 (5) 2.35 (80)
KS4 3.98 (74) 3.98 (70) 0.04 (4) 1.42 (1.22) 2.56 (40) - - -
9.46 (74) 8.89 (70) 0.15 (5) 5.88 (32) 3.01 (77) - - -
15.95 (74) 13.65 (70) 0.30 (5) 12.08 (19) 1.57 (72) 0.34 (2) 13.63 (7) 0.02 (70)
  1. Concentrations of OH, H2OTOT, SiOH, and unknown OH are in mol %