[Ifeffit] Analysis of EXAFS data of a Zn sample with the theoretical model of a similar Mn sample

Hi all, I am trying to analyse the EXAFS data of Zn sample whose structure is not available. The crystallographic data is available for a Mn sample which is likely to have same coordination environment as Zn sample . Is it possible to use the theoretical model generated for Mn sample for the EXAFS analysis of the Zn sample? How much error is expected in the structural parameters obtained from such fittings? With thanks in advance -- Dr. Abhijeet Gaur