Journal of


  (Formerly Journal of the Czech Geological Society)

Original paper

Lucy M. Mottram, Samuel Cafferkey, Amber R. Mason, Tom Oulton, Shi Kuan Sun, Daniel J. Bailey, Martin C. Stennett, Neil C. Hyatt

A feasibility investigation of speciation by Fe K-edge XANES using a laboratory X-ray absorption spectrometer

Journal of Geosciences, volume 65 (2020), issue 1, 27 - 35


We demonstrate effective speciation of Fe in model compounds from analysis of the weak pre-edge features in Fe K-edge XANES spectra, with a commercially available laboratory X-ray spectrometer, using a spherically bent crystal analyser and a low power X-ray tube, in Rowland circle geometry. Direct comparison with XANES data acquired from a third generation synchrotron bending magnet beamline, using the same specimens, validated quantitative agreement in determination of the total integrated intensity and centroid position of the pre-edge feature, which are a probe of the electronic configuration and symmetry of the absorber atom, and hence oxidation state and co-ordination number. This work opens the door to rapid and routine speciation studies of Fe by laboratory XANES, even for materials with relatively dilute absorber concentration of only a few mol. %.

Journal of Geosciences, Published by © Czech Geological Society, with support from the Czech Geological Survey.
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Policy: Open Access

ISSN: 1802-6222

E-ISSN: 1803-1943