|
| Peak Positions (cm−1) | IR Assignments | References |
|
| 3600–3750 | OH group | [70, 71] |
| 3200–3500 | Molecular water | [70, 71, 77–79] |
| 2700–3000 | Hydrogen bonding | [36] |
| 1200–1750 | Asymmetric stretching relaxation of B–O bonds of trigonal BO3 units | |
| Detailed Classification of group 1200–1750 | |
| ~1480 | Asymmetric stretching modes of borate triangles BO3 units | [57–59, 64, 74–76, 80, 81] |
| ~1345 | Presence of pyroborate, orthoborate groups containing | |
| 1200–1300 | B–O bond stretching vibrations and B–O bridging between B3O6 and BO3 triangles | |
| ~1235 | Asymmetric stretching vibrations of B–O bonds from orthoborate groups | |
| 700–1200 | Composite of two silicate chains and borate phases | |
| Detailed Classification of groups 700–1200 | |
| ~1015 | Pentaborate group | |
| 992 | B–O–M, M means metal ion | |
| ~965 | B–O–B linkages | |
| 950–1050 | Stretching vibrations of B–O–Si linkage | [38, 39, 49, 60, 63, 67, 68, 82–88] |
| ~875 | Stretching vibrations of tetrahedral units | |
| 816–833 | Diborate linkage, B–O–B networks | |
| ~815 | Si–O–Si network | |
| 806 | Boroxol rings | |
| 760 | BO3–O–BO4 bond-bending vibrations | |
| 700 | Bending of B–O–B linkage | |
| ~694 | Combined vibrations of BO4 and PbO4 groups | [83–85] |
| 680 | B–O–B bond-bending vibrations from pentaborate group or bending vibrations of BO3 triangles | [80] |
| ~616 | Bending of O–B–O | [89] |
| <600 | Pb2+, Zn2+, Mn2+, Bi3+, Li+, and Ba2+ or any metallic cations | [55, 80, 90–97] |
|
