How to give the bond length for two atoms initial guess value in the interface

[njuxyh]

Hi all:

i am constructing an interface, and there are two different atoms belong to different surfaces,
i am wondering how to give an initial guess for the two atoms' bond length, i know there is a method,
according to the ?? radis of atoms, but i do not remember the exact details, so
would you please tell me what is the exact details of this method?

thanks very much !!


 

[Shinji Usui]

I always use a covalent radius of each atom.

[njuxyh]

OK, I know, thanks very much!