| Quantity | Value | Units | Value | Units |
| Atomic number | 64 | |||
| Atomic mass | 157.25(3) | g mole-1 | ||
| Density | 7.90 | g cm-3 | ||
| Mean excitation energy | 591.0 | eV | ||
| Minimum ionization | 1.188 | MeV g-1cm2 | 9.383 | MeV cm-1 |
| Nuclear collision length | 105.8 | g cm-2 | 13.39 | cm |
| Nuclear interaction length | 182.4 | g cm-2 | 23.09 | cm |
| Pion collision length | 129.6 | g cm-2 | 16.40 | cm |
| Pion interaction length | 209.5 | g cm-2 | 26.52 | cm |
| Radiation length | 7.48 | g cm-2 | 0.9472 | cm |
| Critical energy | 9.34 | MeV (for e-) | 9.01 | MeV (for e+) |
| Molière radius | 17.00 | g cm-2 | 2.151 | cm |
| Plasma energy |
51.67 | eV | ||
| Muon critical energy | 171. | GeV |