Hi everyone, I recently acquired an EXAFS data set (albeit somewhat noisy) on the Pb-L3 edge. I have normalized it using Athena, and tried to fit the first shell using Artemis. I attached the Athena project file as well as the Artemis project file of what I obtained thus far. We have reason to believe the unknown compound is PbO or PbS (or a mixture). However, when I look at the R space curve, the first coordination shell is at rather low path distance (1.7 A), whereas one would expect larger bond distances for PbO and PbS. I found that a similar bond distance as to what the experimental spectrum shows can be found in PbCO3, but a fit using the mineral data of PbCO3 also doesn't do the trick. In any case, no matter what I try to fit in Artemis, nothing seems decent. Is the EXAFS fitting simply impossible due to the noisy data, did I extract my Chi(k) wrong or am I encountering some other issue? I realize it's probably not much to go on, but I'm rather new to EXAFS analysis so any help/advice is appreciated. Thanks a lot in advance! Best regards, Pieter Tack -- X-Ray Micro-Spectroscopy and Imaging Group Department of Analytical Chemistry Ghent University Krijgslaan 281 S12 B-9000 Ghent Belgium Phone: +32 (0)9 264 4723 Fax: +32 (0)9 264 49 60