[Ifeffit] structure for reference Mn foil

Dear IFEFFIT members, I have been trying to obtain the S02 value from metal reference foils measured at the beamline. However, I constantly got a very low S02 value, such as 0.2 or 0.3 using Mn alpha or gamma cif file (first shell of 12 Mn). Only Mn-beta (4 subshell * 3 Mn) could give a S02 in the range 0.8 ~ 1, depending on whether I constrained sigam2 for all the 12 Mn or whether I fixed the CN for each subshell. But the uncertainty is very high. I also fitted the MnO measured together leaving S02 variable, and it resulted in a S02 close to 1. So I am guessing I didn't use the correct structure file for Mn foil . I appreciate if someone could help on this! Best regards, Yang Hu