Greetings,

I was wondering if someone can enlighten me on

the issue of how the metal ionic radius are defined

in the protein structures. Is there any place in the refinement

process where we can define it or it is automatically

taken from some library in the phenix background.

What  is a good resource for knowing the ionic radii,

I came across this one in an old blog post

http://abulafia.mt.ic.ac.uk/shannon/ is there any other source that

is used.

Thanks so much in advance

Manoj Saxena