Wave number (cm−1) | Raman assignment |
| Symmetric stretching vibrations of Bi-O-Bi bonds in pyramidal BiO3 units and BiO6 octahedrons. |
| Bending vibrations of Zn-O bonds in ZnO4 tetrahedrons. |
| Symmetric stretching vibrations of Bi-O-Bi bonds in pyramidal BiO3 units and BiO6 octahedrons. |
| Stretching vibrations of Bi-O− bonds in BiO6 octahedrons. |
| Stretching vibrations of B-O bonds in orthoborate formed by pyramidal BO3 units, stretching vibrations of Bi-O− bonds in BiO6 octahedrons. |
1250 - 1320 cm−1 | Stretching vibrations of Bi-O− bonds in pyramidal BiO3 units. |
1250 - 1500 cm−1 | Stretching vibrations of B-O− bonds and stretching vibrations of O3B-O-BO4 bonds in BO3 pyramidal units, Stretching vibrations of B-O-B bonds in pyramidal BO3 units. |