Original paper
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
DOI: http://doi.org/10.3190/jgeosci.299
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. %.
IF (WoS, 2022): 1.4
5 YEAR IF (WoS, 2022): 1.8
Policy: Open Access
ISSN: 1802-6222
E-ISSN: 1803-1943