| Quantity | Value | Units | Value | Units |
| Atomic number | 69 | |||
| Atomic mass | 168.93422(2) | g mole-1 | ||
| Specific gravity | 9.321 | g cm-3 | ||
| Mean excitation energy | 674.0 | eV | ||
| Minimum ionization | 1.170 | MeV g-1cm2 | 10.90 | MeV cm-1 |
| Nuclear collision length | 107.9 | g cm-2 | 11.57 | cm |
| Nuclear interaction length | 186.7 | g cm-2 | 20.03 | cm |
| Pion collision length | 131.5 | g cm-2 | 14.11 | cm |
| Pion interaction length | 213.6 | g cm-2 | 22.92 | cm |
| Radiation length | 7.03 | g cm-2 | 0.7544 | cm |
| Critical energy | 8.59 | MeV (for e-) | 8.28 | MeV (for e+) |
| Molière radius | 17.36 | g cm-2 | 1.863 | cm |
| Plasma energy ℏωp | 56.22 | eV | ||
| Muon critical energy | 161. | GeV |