| Quantity | Value | Units | Value | Units |
| Atomic number | 77 | |||
| Atomic mass | 192.217(3) | g mole-1 | ||
| Specific gravity | 22.42 | g cm-3 | ||
| Mean excitation energy | 757.0 | eV | ||
| Minimum ionization | 1.134 | MeV g-1cm2 | 25.42 | MeV cm-1 |
| Nuclear collision length | 111.7 | g cm-2 | 4.983 | cm |
| Nuclear interaction length | 194.8 | g cm-2 | 8.687 | cm |
| Pion collision length | 135.1 | g cm-2 | 6.027 | cm |
| Pion interaction length | 221.4 | g cm-2 | 9.877 | cm |
| Radiation length | 6.59 | g cm-2 | 0.2941 | cm |
| Critical energy | 7.67 | MeV (for e-) | 7.39 | MeV (for e+) |
| Molière radius | 18.24 | g cm-2 | 0.8136 | cm |
| Plasma energy ℏωp | 86.36 | eV | ||
| Muon critical energy | 145. | GeV |