title: Intrinsic formation of nanocrystalline neptunium dioxide under neutral aqueous conditions relevant to deep geological repositories.
abstract: The dilution of aqueous neptunium carbonate complexes induces the intrinsic formation of nanocrystalline neptunium dioxide (NpO2) particles, which are characterised by UV/Vis and X-ray absorption spectroscopies and transmission electron microscopy. This new route of nanocrystalline NpO2 formation could be a potential scenario for the environmental transport of radionuclides from the waste repository (i.e. under near-field alkaline conditions) to the geological environment (i.e. under far-field neutral conditions).
authors.affiliation: Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Bautzner Landstrasee 400, D-01328 Dresden, Germany. a.ikeda@hzdr.de.
authors.forename: Richard
authors.initials: R
authors.lastname: Husar
authors.forename: René
authors.initials: R
authors.lastname: Hübner
authors.forename: Christoph
authors.initials: C
authors.lastname: Hennig
authors.forename: Philippe M
authors.initials: PM
authors.lastname: Martin
authors.forename: Mélanie
authors.initials: M
authors.lastname: Chollet
authors.forename: Stephan
authors.initials: S
authors.lastname: Weiss
authors.forename: Thorsten
authors.initials: T
authors.lastname: Stumpf
authors.forename: Harald
authors.initials: H
authors.lastname: Zänker
authors.forename: Atsushi
authors.initials: A
authors.lastname: Ikeda-Ohno