| Wave number (cm−1) | Vibration |
| 3630 3430 1630 1115 1045 920 885 850 800 778 620 524 466 | structural stretching of hydroxyl groups (OH) stretch (OH) of water deformation (OH) of water stretch (longitudinal) SiO SiOSi stretch AlAlOH deformation AlFeOH deformation MgAlOH deformation SiO stretching of quartz and silica quartz SiO stretch AlO and SiO coupling, out of plane AlOSi deformation SiOSi deformation |