| Quantity | Value | Units | Value | Units |
| Atomic number | 68 | |||
| Atomic mass | 167.259(3) | g mole-1 | ||
| Specific gravity | 9.026 | g cm-3 | ||
| Mean excitation energy | 658.0 | eV | ||
| Minimum ionization | 1.168 | MeV g-1cm2 | 10.54 | MeV cm-1 |
| Nuclear collision length | 107.6 | g cm-2 | 11.92 | cm |
| Nuclear interaction length | 186.1 | g cm-2 | 20.62 | cm |
| Pion collision length | 131.2 | g cm-2 | 14.54 | cm |
| Pion interaction length | 213.1 | g cm-2 | 23.61 | cm |
| Radiation length | 7.14 | g cm-2 | 0.7916 | cm |
| Critical energy | 8.73 | MeV (for e-) | 8.42 | MeV (for e+) |
| Molière radius | 17.36 | g cm-2 | 1.924 | cm |
| Plasma energy ℏωp | 55.20 | eV | ||
| Muon critical energy | 163. | GeV |