[Ifeffit] SCF and FMS radius

Hello, I am simulating the XANES spectra of a erbium atom in an interstitial site of ZnO. I needed a SCF radius of 9.75 (316 atoms) and FMS radius of 11.90 (599 atoms) to obtain no change in the simulated spectra (differences of 0.01% or less) Now I am trying to simulate Er(OH)3 and it is using SCF 10.90 (622 atoms) and I still haven found convergence, I will need more even larger radius for FMS. Does the XAS phenomena have this distances? Has this distances physical meaning? Thanks, euG 8<- - - - - - 8<- - - - - - 8<- - - - - - 8<- - - - - - Lic. Eugenio H. Otal E-mail: eotal@citefa.gov.ar eugenioh@gmail.com 8<- - - - - - 8<- - - - - - 8<- - - - - - 8<- - - - - -