[Ifeffit] Multiple species with Artemis

Hi All, A couple of questions. I was searching the previous threads to check if someone here had posted/explained an example with mixing parameters to find the % content of different constituents present in a sample with Artemis. This is for shell-by-shell fitting. Can Artemis fit multiple chemical species/phases to the experimental spectra simultaneously? OR fit the samples spectra measured at 2 different edges with one or two phase simultaneously? Don't know if I searched far enough. Apology if it has been discussed. In that case, could anyone please direct me to those threads. Thanks you, Vineetha