| Quantity | Value | Units | Value | Units | 
| <Z/A> | 0.54724 | |||
| Density | 0.949 | g cm-3 | ||
| Mean excitation energy | 66.6 | eV | ||
| Minimum ionization | 1.977 | MeV g-1cm2 | 1.876 | MeV cm-1 | 
| Nuclear collision length | 57.8 | g cm-2 | 60.98 | cm | 
| Nuclear interaction length | 82.2 | g cm-2 | 86.65 | cm | 
| Pion collision length | 85.4 | g cm-2 | 89.98 | cm | 
| Pion interaction length | 114.2 | g cm-2 | 120.4 | cm | 
| Radiation length | 40.79 | g cm-2 | 43.00 | cm | 
| Critical energy | 88.40 | MeV (for e-) | 86.07 | MeV (for e+) | 
| Molière radius | 9.79 | g cm-2 | 10.31 | cm | 
| Plasma energy  | 20.76 | eV | ||
| Muon critical energy | 1135. | GeV | 
| Elem | Z | Atomic frac* | Mass frac* | 
| 1 | |||
| 6 | |||
| 7 | |||
| 8 | |||
| * calculated from mass fraction data. | |||