Dear Professor Ravel,

I am using FEFF83 and IFEFFIT recently to calculate the EXAFS spectra of Mn-cluster in PhotosystemII.
 
I would like to know what is the E0 value FEFF83 uses for a Mn atom. Does it use the same E0 for all the absorbing atoms if there are multiple Mn atoms in a cluster.

Please let me know if you or any of your group member can help me with this.

Thanks and best regards
Rhitankar Pal
Postdoc, Batista Group
Yale University