| Quantity | Value | Units | Value | Units | 
| <Z/A> | 0.39194 | |||
| Specific gravity | 13.63 | g cm-3 | ||
| Mean excitation energy | 862.0 | eV | ||
| Minimum ionization | 1.105 | MeV g-1cm2 | 15.06 | MeV cm-1 | 
| Nuclear collision length | 113.1 | g cm-2 | 8.301 | cm | 
| Nuclear interaction length | 195.5 | g cm-2 | 14.35 | cm | 
| Pion collision length | 137.3 | g cm-2 | 10.08 | cm | 
| Pion interaction length | 224.5 | g cm-2 | 16.47 | cm | 
| Radiation length | 6.26 | g cm-2 | 0.4592 | cm | 
| Critical energy | 7.10 | MeV (for e-) | 6.84 | MeV (for e+) | 
| Molière radius | 18.69 | g cm-2 | 1.371 | cm | 
| Plasma energy ℏωp | 66.60 | eV | ||
| Muon critical energy | 136. | GeV | 
| Elem | Z | Atomic frac* | Mass frac | 
| 6 | |||
| 92 | |||
| * calculated from mass fraction data | |||