[Ifeffit] choosing k-weight

Dear Ifeffiters, I'm wondering what principles you have to determine the appropriate k-weight to use for FTs. Until now I've used guidelines from a textbook by Teo, based on the Z of the backscattering atoms: Z > 57; kw = 1 57 > Z > 36; kw = 2 Z < 36; n = 3 Of course you can have different backscatterers around your absorber - I've got C, N and Pt! Are there any other rules you follow? Thanks very much in advance! Peter Peter Southon Post Doctoral Fellow School of Chemistry University of Sydney NSW 2006, Australia +61 2 9351 4425