Structure via PubChem · Public domain (PubChem)
iodine-129
Sign in to saveAlso known as I-129, 129I, (129)I, (129)53I, iodine i-129
Iodine-129 (129I) is a long-lived radioisotope of iodine that occurs naturally, but is of greater interest as a man-made nuclear fission product, where it is a potential radiological contaminant. The same contamination, though, together with its long half-life, make it serve as a tracer of environmental processes that have nothing to do with its creation.
Chemical data
- Formula
- I
- Molecular weight
- 128.90498 g/mol
- IUPAC name
- iodane
- SMILES
- [129I]
- InChIKey
- ZCYVEMRRCGMTRW-NJFSPNSNSA-N
- XLogP
- 0.9
- Polar surface area
- 0 Ų
- H-bond donors
- 0
- H-bond acceptors
- 0
- Formal charge
- 0
via PubChem
Wikidata facts
- Instance of
- isotope of iodine
- Subclass of
- iodine
- Mass
- 128.904984
- Image
- Iodine-129.svg
Show 9 more facts
- atomic number
- 53
- neutron number
- 76
- half-life
- 15700000.0
- spin quantum number
- 3.5
- parity quantum number
- 1
- mass excess
- -88507.125
- binding energy
- 1088242.71
- isomeric SMILES
- [129I]
- canonical SMILES
- [I]
via Wikidata · CC0
~8 min read
Encyclopedic overview
10 sectionsContents
- Formation and decay
- Long-lived fission product
- Release by nuclear fuel reprocessing
- Applications
- Groundwater age dating
- Meteorite age dating
- See also
- References
- Further reading
- External links
Iodine-129 (129I) is a long-lived radioisotope of iodine that occurs naturally, but is of greater interest as a man-made nuclear fission product, where it is a potential radiological contaminant. The same contamination, though, together with its long half-life, make it serve as a tracer of environmental processes that have nothing to do with its creation.
==Formation and decay==
Excerpted from Wikipedia’s “iodine-129” article, available under the CC BY-SA 4.0 licence.