view article
Figure 4
Left panel: example of the procedure used to isolate and fit the pre-edge peaks: subtraction of a modified arctangent function mimicking the absorption-edge step, and fit using one or more Gaussian functions. Right panel: calibration curve obtained through a linear fit of the pre-edge peaks centroid position of iron oxides of known oxidation state (Fe2+O, Fe32.66+O4, Fe23+O3, triangles) and used to estimate the oxidation state of the studied samples (crosses). The spectra corresponding to the colored areas of the samples (D) have oxidation states close to 2.7, while that of the light-colored areas (L) are close to 3.0.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 19| Part 5| July 2012| Pages 782-788
doi:10.1107/S0909049512023990
Follow J. Synchrotron Rad.
Sign up for e-alerts
E-alerts
Follow J. Synchrotron Rad. on Twitter
Twitter
Follow us on facebook
Facebook
Sign up for RSS feeds
RSS