Characterisation of Synthetic Two-line Ferrihydrite by Electron Energy Loss Spectroscopy

The precise atomic structure of the nanocrystalline iron oxyhydroxide mineral, ferrihydrite is currently under intense debate concerning two proposed models. We have synthesized two and six line ferrihydrite and concentrated on the characterisation of the two line form. We show that X-ray scattering...

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Bibliographic Details
Published in:Journal of physics. Conference series 2012-01, Vol.371 (1), p.12079-4
Main Authors: Vaughan, G, Brydson, R, Brown, A
Format: Article
Language:English
Subjects:
Assessments
Atomic structure
Electron energy loss spectroscopy
Electrons
Energy dissipation
Iron
Nanocrystals
Nitrates
Physics
Scattering
Spectrum analysis
X-ray scattering
X-rays
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Summary:The precise atomic structure of the nanocrystalline iron oxyhydroxide mineral, ferrihydrite is currently under intense debate concerning two proposed models. We have synthesized two and six line ferrihydrite and concentrated on the characterisation of the two line form. We show that X-ray scattering data for the two-line form are consistent with the most recent reports and that assessment of the octahedral iron content by electron energy loss spectroscopy in the transmission electron microscope suggests some 90% of the iron is ferric with octahedral co-ordination. We also identify nitrate contamination that has not apparently affected the X-ray scattering and so we infer that it is surface adsorbed.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/371/1/012079