Average atomic weight: 85.4678(3) u
| Isotope | Fraction | Atomic weight/u |
| 85 | 0.7217(2) | 84.9117897379(54) |
| 87 | 0.2783(2) | 86.9091805310(60) |
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)
