Average atomic weight: 190.23(3) u
| Isotope | Fraction | Atomic weight/u |
| 184 | 0.0002(1) | 183.9524885(14) |
| 186 | 0.0159(3) | 185.9538350(16) |
| 187 | 0.0196(2) | 186.9557474(16) |
| 188 | 0.1324(8) | 187.9558352(16) |
| 189 | 0.1615(5) | 188.9581442(17) |
| 190 | 0.2626(2) | 189.9584437(17) |
| 192 | 0.4078(19) | 191.9614770(29) |
Atomic weights and isotopic compositions were obtained from NIST Database 144
The Atomic Line List does not contain any data for this element
(Atomic Line List v3.00b5)
