Overview of the standard EXAFS data analysis procedure Introduction Interpretation of EXAFS data is normally based on the EXAFS equation

with appropriate accomodation for forward scattering (\focussing e ect") for higher shells, and inclusion of higher cumulants as necessary. The aim of data analysis is to determine the distances, coordination numbers, disorder parameters and types of atoms in the various coordination shells for the \unknown" sample. The extent to which this is possible depends on the nature of the system, the quality of standards, the quality of the data. The scheme of data analysis is very much intertwined with the experimental methods. The standard sequence of operations consists of: normalization of the data to unit edge step; interpolation to k-space; fourier transformation to r-space; isolation of the amplitude and phase of individual coordination shell windowing and inverse transformation; and analysis of the amplitudes and phase using the EXAFS equation by nonlinear least squares tting, the cumulant expansion/ratio method, and beat analysis. Many variants of these exist, as well as entirely di erent methods, but here we shall concentrate on the standard methods, which have been carefully thought out and well tested. For additional discussion see the article by D.E. Sayers and B.A. Bunker in reference [1].