On the discrimination between magnetite and maghemite by XANES measurements in fluorescence mode

A. Espinosa, A. Serrano, A. Llavona, J. Jimenez De La Morena, M. Abuin, Albert Figuerola, T. Pellegrino, J. F. Fernández, M. Garcia-Hernandez, G. R. Castro, M. A. Garcia*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

We discuss here the quantification of magnetite and maghemite from x-ray absorption near edge spectroscopy at the Fe K-edge in fluorescence mode. We show that the modification of the spectral shape due to self-absorption effects can lead to erroneous results for certain thicknesses. However, for homogeneous samples containing just magnetite and maghemite without other phases, the quantification of magnetite and maghemite can be obtained from the spectra measured in fluorescence mode without correcting the spectra for the self-absorption effects. We describe the conditions to carry on this analysis that requires measuring the reference compounds exactly under the same conditions as the studied samples and using the appropriate thickness.

Original languageEnglish (US)
Article number015602
JournalMeasurement Science and Technology
Volume23
Issue number1
DOIs
StatePublished - Jan 1 2012

ASJC Scopus subject areas

  • Instrumentation
  • Engineering (miscellaneous)
  • Applied Mathematics

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