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molshape merged 3 commits into from
Aug 2, 2025
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Update/atomic weights #18

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6cae939
Update Atomic Weights
molshape Aug 2, 2025
9b9b6ab
Update Atomic Weights -> 1.4.0
molshape Aug 2, 2025
7511a67
Merge branch 'update/atomic-weights' of https://github.com/molshape/C…
molshape Aug 2, 2025
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4 changes: 3 additions & 1 deletion README.md
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Expand Up @@ -273,7 +273,9 @@ All atomic weights are taken from the IUPAC Commission on Isotopic Abundances an
- [*Pure Appl. Chem.*, **2016**, *88*, 1225-1229](https://doi.org/10.1515/pac-2016-0501)
- [*Chem. Int.*, **2018**, *40*(4), 23-24](https://doi.org/10.1515/ci-2018-0409)
- [*Chem. Int.*, **2020**, *42*(2), 31](https://doi.org/10.1515/ci-2020-0222)
- [*Pure Appl. Chem.*, **2022**, *94*(5), 573-600](https://doi.org/10.1515/pac-2019-0603)
- [*Chem. Int.*, **2025**, *47*(1), 20-20](https://doi.org/10.1515/ci-2025-0105)

The actual data has been downloaded from https://www.qmul.ac.uk/sbcs/iupac/AtWt/ as of August 8th, 2021. The original data has been mirrored to [/misc/AtWt19.html](https://github.com/molshape/ChemFormula/blob/main/misc/AtWt19.html).
The current data has been downloaded from https://iupac.qmul.ac.uk/AtWt/ as of August 2<sup>nd</sup>, 2025. The original data has been mirrored to [/misc/AtWt23.html](https://github.com/molshape/ChemFormula/blob/main/misc/AtWt23.html).

Quoted atomic weights are those suggested for materials where the origin of the sample is unknown. For most radioactive elements the isotope with the longest half-life is quoted as an integer.
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