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Table 1 The ranges of 29Si chemical shifts in solid silicates, derived from [55]

From: Insights into the structure and morphogenesis of the giant basal spicule of the glass sponge Monorhaphis chuni

Type of silicates Qn species Range of chemical shift (ppm)
Monosilicates Q0 − 66 to − 74
Disilicates and chain end groups Q1 − 75 to − 82
Chain middle groups Q2 − 85 to − 89
Chain branching sites Q3 − 95 to − 100
Three-dimensional framework Q4 − 103 to − 115