Dear All, First of all, I am still very new in EXAFS analysis, so please excuse me for any misunderstandings. My sample is a crystalized La2Zr2O7 thin layer (thickness = 100 nm) on a NiW substrate and we have realized EXAFS measurements by grazing angle under primary vacuum at Lathanum L3 edge (ESRF, Grenoble, France). My objectives are to establish the local distortions due to the different constraints in the oxide thin layer. The La2zr2O7 crystalized in a pyrochlore structure (SG = Fd-3m ; a = 10.78A). First scattering path La-O2.1 2.3352A La-O1.1 2.6453A But I have a problem: I observe the first peaks at 1.28A and 1.80A on the EXAFS spectra as a function of R. How do you explain this feature? Can you point me in the right direction for these issues? I attached the project file La_80_LZO_1000.prj of my sample: LAHM045 to LAHM50 = 6 different scans La_80_LZO_1000 = Data merge Thanks Best regards Hervé Muguerra