Hello everyone, I am currently using IFEFFIT to fit LIII edge data collected for Pt, Re and PtRe bi-metallic Nan particles supported on carbon, and I have several questions: 1. I get an So2 value of 0.54 from a first coordination shell fit on Re-foil (this So2 value also seems to work when fitting NH4ReO4-) Has anyone ever worked with Re before and gotten a similar value for So2 ? 2. I model the path for the a single coordination shell as 6 octahedrally arranged nearest neighbor atoms surrounding the absorber atom at a distance equal to that of inter -atomic spacing in the metal. When comparing the IFEFFIT predicted EXAFS for this model to one that is generated by using the first path from a crystallographic model, the two seem slightly different. The nanoparticles are very small (amorphous to XRD), and probably consist of a disordered phase, so I cannot assign a crystal structure. What should I do in this case? 3. I often get high correlations the coordination number and ss, or delEo and dR (the correlations are ~0.8). Using multiple k-weights doesn’t decrease the correlations. What is an acceptable value for these correlations? Thank you very much for taking the time to answer my questions -Ed Kunkes