[Ifeffit] A small query on constricting mean square displacement in multi-edge EXAFS refinement

Dear All, Suppose I have a compound, say AB. I have the EXAFS data from both A-edge as well as B-edge and I am simultaneously refining these data. Would it be correct to force the mean square displacement of the A-B path in both the edges to be the same? -- Regards, Badari Narayana. A. R. Ph.D Student, Nanoscience and Nanotechnology, c/o Prof Rajeev Ranjan, Electroceramics Lab, Department of Materials Engineering, Indian Institute of Science.