| Quantity | Value | Units | Value | Units |
| <Z/A> | 0.58962 | |||
| Specific gravity (20° C, 1 atm) | 1.87E-03 | g cm-3 | ||
| Minimum ionization | 2.262 | MeV g-1cm2 | 4.226E-03 | MeV cm-1 |
| Nuclear collision length | 55.3 | g cm-2 | 2.962E+04 | cm |
| Nuclear interaction length | 76.7 | g cm-2 | 4.106E+04 | cm |
| Pion collision length | 83.0 | g cm-2 | 4.443E+04 | cm |
| Pion interaction length | 108.5 | g cm-2 | 5.809E+04 | cm |
| Radiation length | 45.37 | g cm-2 | 2.429E+04 | cm |
| Critical energy | 131.58 | MeV (for e-) | 128.77 | MeV (for e+) |
| Molière radius | 7.31 | g cm-2 | 3915. | cm |
Plasma energy ![]() |
0.96 | eV | ||
| Muon critical energy | 1558. | GeV | ||
| Melting point | 85.52 | K | -187.6 | C |
| Boiling point @ 1 atm | 231.0 | K | -42.10 | C |
| Elem | Z | Atomic frac* | Mass frac* |
| 1 | |||
| 6 | |||
| * calculated from mass fraction data. | |||