| Quantity | Value | Units | Value | Units |
| <Z/A> | 0.53769 | |||
| Density | 0.879 | g cm-3 | ||
| Mean excitation energy | 63.4 | eV | ||
| Minimum ionization | 1.951 | MeV g-1cm2 | 1.715 | MeV cm-1 |
| Nuclear collision length | 57.5 | g cm-2 | 65.44 | cm |
| Nuclear interaction length | 81.7 | g cm-2 | 92.98 | cm |
| Pion collision length | 85.0 | g cm-2 | 96.70 | cm |
| Pion interaction length | 113.7 | g cm-2 | 129.4 | cm |
| Radiation length | 43.79 | g cm-2 | 49.84 | cm |
| Critical energy | 93.82 | MeV (for e-) | 91.36 | MeV (for e+) |
| Molière radius | 9.90 | g cm-2 | 11.26 | cm |
Plasma energy ![]() |
19.81 | eV | ||
| Muon critical energy | 1189. | GeV |
| Elem | Z | Atomic frac* | Mass frac* |
| 1 | |||
| 6 | |||
| * calculated from mass fraction data. | |||