Sciencemadness Discussion Board

Reference source for atomic, covalent, ionic and Van-der-Waals radii?

XenonRadon - 16-8-2019 at 08:53

Will appreciate you help/opinions. What would you consider to be a credible reference source for radii of the elements: atomic, covalent, ionic and Van-der-Waals radii? I have been looking at several reference books and website sources, the numbers vary.

Metacelsus - 16-8-2019 at 10:38

https://www.ccdc.cam.ac.uk/ has crystallographic data. You can probably find the interatomic distances of most elements from this.

Of course, the "radii" of atoms will depend on their context (eg, H2 vs HCl vs Cl2)

j_sum1 - 17-8-2019 at 00:38

Or you could use this periodic table. I have not checked, but I see no reason to doubt its accuracy. It gives you the radii you are after.
https://ptable.com/#Property/Radius/Calculated

XenonRadon - 29-10-2019 at 07:35

Metacelus / j_sum1 - Thanks for those references. (And excuse the late reply, just realized I never posted a "thank you.")

morganbw - 29-10-2019 at 14:58

Quote: Originally posted by j_sum1  
Or you could use this periodic table. I have not checked, but I see no reason to doubt its accuracy. It gives you the radii you are after.
https://ptable.com/#Property/Radius/Calculated

I have this bookmarked. Really like it.

CharlieA - 29-10-2019 at 16:11

Quote: Originally posted by j_sum1  
Or you could use this periodic table. I have not checked, but I see no reason to doubt its accuracy. It gives you the radii you are after.
https://ptable.com/#Property/Radius/Calculated


I bookmarked it too. Thanks for the link.

OP: have you checked a handbook like Lange's or the CRC Handbook? I would not be surprised at finding small differences reported for various atomic/molecular dimensions in different sources, especially if the sources for from very different times.