| Т, ˚C | NS, μm−2 | R, Å |
| 370 | 90 | 103 |
| 390 | 108 | 150 |
| 400 | 112 | 160 |
| 420 | 120 | 190 |
| 460 | 134 | 250 |
| 464 | 131 | 260 |
| 490 | 118 | 300 |
| 520 | 94 | 335 |
| 540 | 74 | 375 |
| 560 | 60 | 408 |
| 580 | 48 | 440 |