| Quantity | Value | Units | Value | Units | 
| <Z/A> | 0.55179 | |||
| Density | 1.10 | g cm-3 | ||
| Mean excitation energy | 63.2 | eV | ||
| Minimum ionization | 1.993 | MeV g-1cm2 | 2.192 | MeV cm-1 | 
| Nuclear collision length | 57.1 | g cm-2 | 51.91 | cm | 
| Nuclear interaction length | 80.7 | g cm-2 | 73.33 | cm | 
| Pion collision length | 84.6 | g cm-2 | 76.93 | cm | 
| Pion interaction length | 112.6 | g cm-2 | 102.4 | cm | 
| Radiation length | 43.05 | g cm-2 | 39.14 | cm | 
| Critical energy | 93.73 | MeV (for e-) | 91.25 | MeV (for e+) | 
| Molière radius | 9.74 | g cm-2 | 8.854 | cm | 
| Plasma energy  | 22.45 | eV | ||
| Muon critical energy | 1194. | GeV | 
| Elem | Z | Atomic frac* | Mass frac* | 
| 1 | |||
| 6 | |||
| 8 | |||
| * calculated from mass fraction data. | |||