Quantity | Value | Units | Value | Units |
Atomic number | 87 | |||
Atomic mass | [223.01974(2)] | g mole-1 | ||
Specific gravity | 1.870 | g cm-3 | ||
Mean excitation energy | 827.0 | eV | ||
Minimum ionization | 1.118 | MeV g-1cm2 | 2.091 | MeV cm-1 |
Nuclear collision length | 116.4 | g cm-2 | 62.27 | cm |
Nuclear interaction length | 204.6 | g cm-2 | 109.4 | cm |
Pion collision length | 139.5 | g cm-2 | 74.62 | cm |
Pion interaction length | 230.9 | g cm-2 | 123.5 | cm |
Radiation length | 6.19 | g cm-2 | 3.309 | cm |
Critical energy | 7.59 | MeV (for e-) | 7.32 | MeV (for e+) |
Molière radius | 17.29 | g cm-2 | 9.247 | cm |
Plasma energy ℏωp | 24.61 | eV | ||
Muon critical energy | 143. | GeV | ||
Melting point | 300.1 | K | 27.00 | C |
Boiling point @ 1 atm | 950.2 | K | 677.0 | C |