Average atomic weight: 173.054(5) u
| Isotope | Fraction | Atomic weight/u |
| 168 | 0.00123(3) | 167.9338896(22) |
| 170 | 0.02982(39) | 169.9347664(22) |
| 171 | 0.1409(14) | 170.9363302(22) |
| 172 | 0.2168(13) | 171.9363859(22) |
| 173 | 0.16103(63) | 172.9382151(22) |
| 174 | 0.32026(80) | 173.9388664(22) |
| 176 | 0.12996(83) | 175.9425764(24) |
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)
