| K Vectors | Γ (0, 0, 0) | |
| Ordinal number | Value (cm−1) | Class |
| 1 | 0 | TA (A2u) |
| 2 | 0 | LA (E1u) |
| 3 | 0 | LA (E1u) |
| 4 | 457.09 | TO (E1u) |
| 5 | 464.45 | TO (E1u) |
| 6 | 465.80 | TO (E2g) |
| 7 | 472.34 | TO (E2g) |
| 8 | 680.03 | LO (A2u) |
| 9 | 810.89 | LO (B2g) |