Dear list, We are trying to fit EXAFS from data collected on solutions within a capillary. The capillary has OD 1mm, ID 0.8mm, and was placed horizontally. The beam is 1x2 mm (VxH). Fitting the copper reference foil, we get the expected SO2 value of ~0.7. However, the solution containing the Cu(II) aqua ion gives a coordination of 2, instead of the expected 5-6. So our SO2 for this solution is apparently ~0.25. I couldn’t find a discussion of the effect of geometry (in our case cylindrical rather than planar) on SO2. Is it possible that the low SO2 is a result of the odd geometry? Confused as ever, JOEL Joël Brugger Professor of Synchrotron Geosciences Monash University School of Earth, Atmosphere and Environment Room 257A, Level 2, 9 Rainforest Walk x-apple-data-detectors://2 Clayton, Victoria 3800 x-apple-data-detectors://2 Australia x-apple-data-detectors://2 T: +61 3 9905 4898 tel:+61%203%209902%209095 E: Joel.Brugger@monash.edu mailto:Andrew.Mackintosh@monash.edu Twitter: @JoelBrugger