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Table 2.
Silicate Si–O vibrational wavelengths.
| λ | Species | NBO/T | Central | Structural |
|---|---|---|---|---|
| (μm) | λ (μm) | elements | ||
| 11.49–11.9 | SiO4 | 4 | 11.69 | Single |
| terahedra | ||||
| 10.87–11.23 | Si2O7 | 3 | 11.05 | Double |
| tetrahedra | ||||
| 10.0–10.52 | SiO3 | 2 | 10.26 | Single-linked |
| chains | ||||
| 9.09–9.52 | Si2O5 | 1 | 9.31 | Sheets |
| 8.33–9.38 | SiO2 | 0 | 8.86 | 3D network |
Notes. Species refers to the tetrahedra component of the silicate, NBO/T is the number of non-bridging oxygen atoms per tetrahedron. Data drawn from Brawer & White (1975), Virgo et al. (1980), Kusabiraki & Shiraishi (1981), Kusabiraki (1987), Jäger et al. (1998), Aguiar et al. (2009).
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