Hi IFEFFIT Users, I major in environmental science and my research is studying the adsorption of aqueous cadmium on TiO2 solid. I am new to EXAFS and currently trying to fit my Cd K-edge spectra with some Cd experimental standards. The Farrel Lytle Database have some Cd spectra which seems useful and I would like to extract them from their "raw" state. The macro is given in the FAQ/Data Handling section of IFEFFIT, but I am not sure of how to go about using the macro or any other macro. Ctrl 5 in Athena is all I know. Can anyone advise me on this? # macro lytle file group 4000 read_data ($1, group=$2, label='steps i0 i1 i2') set (dspace = 1.92017, stpdeg = $3) set (r2d = 57.29577951, hc = 12398.61) set $2.energy = hc / (2 * dspace) / sin($2.steps / (r2d * stpdeg)) set $2.xmut = -log($2.i1/$2.i0) set $2.xmuf = ($2.i2/$2.i0) pre_edge $2.energy, $2.xmut end macro Cheers, Alan -- Alan Jianhong DU Research Student Nanyang Technological University, Singapore School of Civil & Environmental Engineering Blk N1, N1-B4b-04, 50 Nanyang Avenue, Singapore 639798 Mobile: +65 9621 6991 Fax: +65 6861 5254