Average atomic weight: 183.84(1) u
| Isotope | Fraction | Atomic weight/u |
| 180 | 0.0012(1) | 179.9467108(20) |
| 182 | 0.2650(16) | 181.94820394(91) |
| 183 | 0.1431(4) | 182.95022275(90) |
| 184 | 0.3064(2) | 183.95093092(94) |
| 186 | 0.2843(19) | 185.9543628(17) |
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)
