Dear Sir or Madam,

I got a normalized Fe K-edge EXAFS spectrum for my amorphous 7-component alloy sample, for which I know its atomic percent composition.

I need to find out the interatomic distances between the Fe and the other atoms present in the alloy (identify the peaks in R-space) as well as how many atoms of each element is surrounding the absorbing iron atom (coordination number).  

To meet my goal, I think I need to fit the R-space Fourier transform of my EXAFS spectrum in a program like Artemis. Unfortunately, I haven`t found any tutorial discussing how to deal with amorphous sample with unknown organization of the atoms. When you are about to prepare an atomic model in Artemis for fitting, you need to build a model with an initial interatomic distances, atomic coordination number, etc, but all that is obviously unknown to me. I know nothing about the short range order in my material and I want to learn it from the experiment itself (note that it  can be and most probably is different from the one present in crystalline structures). So, my question is, could somebody tell me how to deal with such system using the Artemis, what type of initial models for fitting should be prepared?

All of your help will be greatly appreciated.

Best regards,
Piotr Bardziński,

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