| S/N | Temperature, T (K) | T−1 × 10−4 (K−1) | k × 10−5 | ln k |
| 1 | 823 | 12.15 | 4.9377 | −9.92 |
| 2 | 873 | 11.45 | 6.5097 | −9.64 |
| 3 | 923 | 10.83 | 7.4600 | −9.50 |
| 4 | 1023 | 9.78 | 8.7100 | −9.35 |