| Quantity | Value | Units | Value | Units |
| Atomic number | 56 | |||
| Atomic mass | 137.327(7) | g mole-1 | ||
| Specific gravity | 3.500 | g cm-3 | ||
| Mean excitation energy | 491.0 | eV | ||
| Minimum ionization | 1.231 | MeV g-1cm2 | 4.307 | MeV cm-1 |
| Nuclear collision length | 102.0 | g cm-2 | 29.16 | cm |
| Nuclear interaction length | 174.6 | g cm-2 | 49.89 | cm |
| Pion collision length | 126.1 | g cm-2 | 36.02 | cm |
| Pion interaction length | 202.0 | g cm-2 | 57.71 | cm |
| Radiation length | 8.31 | g cm-2 | 2.373 | cm |
| Critical energy | 10.98 | MeV (for e-) | 10.62 | MeV (for e+) |
| Molière radius | 16.04 | g cm-2 | 4.583 | cm |
| Plasma energy ℏωp | 34.43 | eV | ||
| Muon critical energy | 194. | GeV |