If you mean that your S02 value for platinum foil is 0.53 instead of the expected 0.85 or so, you have to first find out why that happened. There are too many (for a quick list) setup-related and sample-related reasons that can explain why it happened. You should be careful with your NP data analysis, since your foil EXAFS acts up. Anatoly -----Original Message----- From: ifeffit-bounces@millenia.cars.aps.anl.gov [mailto:ifeffit-bounces@millenia.cars.aps.anl.gov] On Behalf Of Juan Antonio Maciá Agulló Sent: Monday, December 04, 2006 2:03 PM To: XAFS Analysis using Ifeffit Subject: [Ifeffit] CN and bond distances in Artemis Hi all, I read your papers Anatoly. You fixed the value of S02 found in the Pt metal, and the expression in Artemis would be like this: N:1 x S02: amp·N, right?? I have a low value of S02 in the case of platinum (0.53), how can I solve the problem? Bond distances = delR + Reff (with phase correction)? Thank you very much, Best regards, JA