Hi Maria, What was the physical form of the samples (powder, thin film, etc.) and how were they measured (transmission, fluorescence, ...)? Sometimes this kind of thing can stem from sample/beamline/data effects. --Scott Calvin Sarah Lawrence College On Nov 5, 2010, at 5:50 PM, María Elena Montero Cabrera wrote:
Hello friends,
Hopping someone could help us. We are having some problems in fitting Ru K-edge in a Ruthenium-cuprate sample on Artemis, with path functions obtained using FEFF 8.4, where we got amplitude values of less than 0.50 for Ru-O first shells. We think this value probably is wrong, although there are some publications where some oxygen deficiency is studied and recorded as true. The ATOMS input data was found to be ok due to the Rietveld analysis results told us these are good. The reason we think we may be wrong with something during the fitting appeared because we tried to fit our reference sample of RuO2 (measured under same conditions as the experiment of Ru-Cu at SSRL) and we came to the same results, even worst, of amplitude lower than 0.40. We are attaching the Artemis files so you can take a look on it and give us some light to continue with our analysis. Thanking in advance, take care