[Ifeffit] help with CoCr bimetallic catalyst

I have been, working with a bimetallic Co/Cr catalyst supported on a silica template for synthesis of single wall carbon nanotubes. Recently I have performed some analysis at the NSLS. It is clear from the spectra in R space that the interatomic distances are modified compared to the monometallic catalyst therefore I am dealing with an alloy. Does anyone have or know about a model that would allow me to get a coordination nomber using Artemis. Thank you, Codruta.