Average atomic weight: 131.293(6) u
| Isotope | Fraction | Atomic weight/u |
| 124 | 0.000952(3) | 123.9058920(19) |
| 126 | 0.000890(2) | 125.9042983(38) |
| 128 | 0.019102(8) | 127.9035310(11) |
| 129 | 0.264006(82) | 128.9047808611(60) |
| 130 | 0.040710(13) | 129.903509349(10) |
| 131 | 0.212324(30) | 130.90508406(24) |
| 132 | 0.269086(33) | 131.9041550856(56) |
| 134 | 0.104357(21) | 133.90539466(90) |
| 136 | 0.088573(44) | 135.907214484(11) |
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)
