| Quantity | Value | Units | Value | Units |
| <Z/A> | 0.54631 | |||
| Density | 0.870 | g cm-3 | ||
| Mean excitation energy | 61.8 | eV | ||
| Minimum ionization | 1.986 | MeV g-1cm2 | 1.728 | MeV cm-1 |
| Nuclear collision length | 57.1 | g cm-2 | 65.66 | cm |
| Nuclear interaction length | 80.8 | g cm-2 | 92.90 | cm |
| Pion collision length | 84.6 | g cm-2 | 97.28 | cm |
| Pion interaction length | 112.8 | g cm-2 | 129.6 | cm |
| Radiation length | 44.05 | g cm-2 | 50.63 | cm |
| Critical energy | 95.94 | MeV (for e-) | 93.43 | MeV (for e+) |
| Molière radius | 9.74 | g cm-2 | 11.19 | cm |
Plasma energy ![]() |
19.87 | eV | ||
| Muon critical energy | 1214. | GeV |
| Elem | Z | Atomic frac* | Mass frac* |
| 1 | |||
| 6 | |||
| * calculated from mass fraction data. | |||