I am running an EXAFS fitting for spinel Co3O4. As we know, the Co3O4 will have two different two local coordinations. One is 6 Co-O coordinated octahedral site, and another one is 4 Co-O coordinated tetrahedral site. When we run the Feff calculation, we can only use one Co site to do the calculation once, and we can only get one site coordination by one calculation. However, the EXAFS will tell us the average local structure. How could we use these two different calculation paths to do the fitting?