Publikationsrepositorium - Helmholtz-Zentrum Dresden-Rossendorf
2 PublikationenThe molecular topology of uranium(VI) bonding to iron and aluminium oxyhydroxide nanoclusters revisited by EXAFS spectroscopy
Rossberg, A.; Ulrich, K.-U.; Scheinost, A. C.
Abstract
Applying a novel approach to the spectral analysis of Extended X-ray Absorption Fine Structure (EXAFS) we were able to derive an advanced 3-D structural model of the uranyl sorption complex on hydrated carbonate-free surfaces of aluminum(III) and iron(III) oxyhydroxide nanoclusters. The calculated molecular model fits the EXAFS data consistently up to a radial sphere of 4.5 Å around the uranium absorber. Being unaware of the physicochemical reasons for the specific complex topology characterized by a slightly tilted and distorted geometry, alternative ideas of EXAFS interpretation are discussed.
Keywords: uranium; sorption; iron oxides; monte carlo simulation; x-ray absorption spectroscopy
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Poster
Actinides XAS 2006, 18.-20.09.06, Karlsruhe, Germany -
Beitrag zu Proceedings
Actinides XAS 2006, 18.-20.09.2006, Karlsruhe, Germany
Speciation Techniques and Facilities for Radioactive Materials at Synchrotron Light Sources: OECD, 978-92-64-99006-7, 281
Permalink: https://www.hzdr.de/publications/Publ-9085
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