title: Structure and spectroscopy of hydrated neptunyl(VI) nitrate complexes.
abstract: Complexation between hexavalent neptunium and nitrate was studied in aqueous nitric acid solution using optical absorption, vibrational and X-ray absorption spectroscopies. Distributions of aqueous [NpO2](2+), [NpO2(NO3)](+) and [NpO2(NO3)2] species were obtained as a function of nitric acid concentration between 0 and 14 M. The crystal structure of [NpO2(NO3)2(H2O)2]·H2O was determined.
authors.affiliation: Institute for Nuclear Waste Disposal, Karlsruhe Institute of Technology, P.O. Box 3640, 76021 Karlsruhe, Germany. patric.lindqvist@kit.edu.
authors.forename: Patric
authors.initials: P
authors.lastname: Lindqvist-Reis
authors.forename: Christos
authors.initials: C
authors.lastname: Apostolidis
authors.forename: Olaf
authors.initials: O
authors.lastname: Walter
authors.forename: Remi
authors.initials: R
authors.lastname: Marsac
authors.forename: Nidhu Lal
authors.initials: NL
authors.lastname: Banik
authors.forename: Mikhail Yu
authors.initials: MY
authors.lastname: Skripkin
authors.forename: Jörg
authors.initials: J
authors.lastname: Rothe
authors.forename: Alfred
authors.initials: A
authors.lastname: Morgenstern