Average atomic weight: 151.964(1) u
| Isotope | Fraction | Atomic weight/u |
| 151 | 0.4781(6) | 150.9198578(18) |
| 153 | 0.5219(6) | 152.9212380(18) |
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)
