Hi, I am recently trying to use Larch to fit XAS spectra of uranium compounds (e.g., UO2, using an existing CIF file). I did not achieve a good fit and the amplitude of the model is way lower than the data. Then I tried to plot the uranium oxygen 1st path with all 8 atoms a sigma2=0.001 by using the plot model function. The resulting scattering peak is still far lower than it should be (images below). Did I do something strange with the program? The Larch version I used was 0.9.59. I can send the cif file and the UO2 data I used if necessary. Best, Juejing Juejing Liu Guo Group Materials Science and Engineering program Alexandra Navrotsky Institute for Experimental Thermodynamics Washington State University Pullman, WA 99164-4630 Office: Fulmer Hall, Room 630 Phone: 208-206-7304