| Quantity | Value | Units | Value | Units |
| Atomic number | 55 | |||
| Atomic mass | 132.90545196(6) | g mole-1 | ||
| Specific gravity | 1.873 | g cm-3 | ||
| Mean excitation energy | 488.0 | eV | ||
| Minimum ionization | 1.254 | MeV g-1cm2 | 2.349 | MeV cm-1 |
| Nuclear collision length | 101.2 | g cm-2 | 54.01 | cm |
| Nuclear interaction length | 172.8 | g cm-2 | 92.25 | cm |
| Pion collision length | 125.3 | g cm-2 | 66.88 | cm |
| Pion interaction length | 200.2 | g cm-2 | 106.9 | cm |
| Radiation length | 8.31 | g cm-2 | 4.434 | cm |
| Critical energy | 11.34 | MeV (for e-) | 10.97 | MeV (for e+) |
| Molière radius | 15.53 | g cm-2 | 8.292 | cm |
| Plasma energy ℏωp | 25.37 | eV | ||
| Muon critical energy | 200. | GeV |