I am pretty sure it stand for the calculated Effective Scattering factor F(eff)ective.Dear all, I wish to ask a somewhat novice question: What does the acronym FEFF stand for? Thank you. _______________________________________________ Ifeffit mailing list Ifeffit@millenia.cars.aps.anl.gov http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit