| Quantity | Value | Units | Value | Units |
| <Z/A> | 0.52740 | |||
| Specific gravity | 1.28 | g cm-3 | ||
| Minimum ionization | 1.889 | MeV g-1cm2 | 2.424 | MeV cm-1 |
| Nuclear collision length | 57.9 | g cm-2 | 45.17 | cm |
| Nuclear interaction length | 82.8 | g cm-2 | 64.51 | cm |
| Radiation length | 43.49 | g cm-2 | 33.90 | cm |
| Critical energy | 89.98 | MeV (for e-) | 87.58 | MeV (for e+) |
| Molière radius | 10.25 | g cm-2 | 7.989 | cm |
Plasma energy ![]() |
23.70 | eV | ||
| Muon critical energy | 1149. | GeV |
| Elem | Z | Atomic frac* | Mass frac* |
| 1 | |||
| 6 | |||
| * calculated from mass fraction data. | |||