Abstract
Synchrotron radiation has been used to investigate the X-ray absorption properties (Fe K-edge and EXAFS) of oxides containing iron with a high oxidation state (+3, +4, +5) in regular ( O h ) or distorted ( D 4 h ) octahedral co-ordination. It is shown that the usual monotonic variation of the edge energy with oxidation state depends closely on the electrical properties of the material and on the symmetry of the iron site. Moreover, the main absorption line is split when the symmetry of the iron site is lowered from O h , to D 4h . New evidence is thus given that X-ray absorption spectroscopy can provide useful information about the absorbing atom site: it could be used in principle to point out certain types of distortions of the first shell of neighbors around the absorbing atom. A full EXAFS analysis of this shell and XANES (X-ray absorption near edge structure) data are also reported and discussed.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
