Skip to content

Conversation

rkingsbury
Copy link
Contributor

Summary

This PR updates the van_der_waals_radius data used by the Element class from Wikipedia data to the latest values in the in the CRC Handbook of Chemistry and Physics. Important changes from the previous values include:

  • Revised the value for H down by 0.1 angstrom as recommended in a critical review by Rowland and Taylor
  • Added values for many lanthanides, actinides, and transition metals that were previously absent
  • Updated values or many transition metals

All data, and the justification for which values were chosen, can be found in

"Atomic Radii of the Elements" in CRC Handbook of Chemistry and Physics, 91st Ed.; Haynes, W.M., Ed.; CRC Press: Boca Raton, FL, 2010.

@rkingsbury
Copy link
Contributor Author

Git does not seem well-equipped to diff .json files, so you can use this online tool to better see the changes:

https://jsoncompare.com/#!/diff/id=6924b719277a2a2b7a630352828d155c&fullscreen/

click the 'lint' button on both panes and you will see each change nicely highlighted

@coveralls
Copy link

Coverage Status

Coverage decreased (-0.6%) to 83.007% when pulling 1c23fb5 on rkingsbury:vdw_data into ad5cb53 on materialsproject:master.

@mkhorton
Copy link
Member

Thank you @rkingsbury , definitely happy to have data sourced from somewhere that isn't wikipedia here :-)

@mkhorton mkhorton merged commit 276c36e into materialsproject:master Apr 29, 2021
@rkingsbury rkingsbury deleted the vdw_data branch April 29, 2021 00:23
DanielYang59 added a commit to DanielYang59/pymatgen that referenced this pull request Apr 21, 2025
DanielYang59 added a commit to DanielYang59/pymatgen that referenced this pull request Apr 21, 2025
shyuep pushed a commit that referenced this pull request Apr 21, 2025
…ook (#4372)

* add new values that are absent from CSV at all

* remove fixed issues

* regenerate json and yaml

* add Ge vdw radius

* remove legacy electron_affinities.yaml

* manually recover electron affinities for D for now

* reapply update from #2122

* Revert "Fix inconsistent "Van der waals radius" and "Metallic radius" in `core.periodic_table.json` (#4345)"

This reverts commit bdc448f.

* add note

* revert changes to metallic radii

* revert change to metallic radii in production json

* fix Pa vdw radius
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
None yet
Projects
None yet
Development

Successfully merging this pull request may close these issues.

3 participants