title: XAFS and LIBD investigation of the formation and structure of colloidal Pu(IV) hydrolysis products.
abstract: Pu(IV) oxyhydroxide colloid growth is investigated with XAFS and LIBD. From combined results a model of colloid formation is proposed, which leads to a face-centered cubic Pu sublattice having cation defects, as observed with EXAFS, and a linear dependency of log [Pu(IV)] on -log [H+] with slope -2, in accord with LIBD. The solubility for Pu(IV) measured with LIBD is close to the lower limit of the solubility curve from previously reported data.
authors.affiliation: Institut für Nukleare Entsorgung, Forschungszentrum Karlsruhe, Postfach 3640, D-76021 Karlsruhe, Germany.
authors.forename: Jörg
authors.initials: J
authors.lastname: Rothe
authors.forename: Clemens
authors.initials: C
authors.lastname: Walther
authors.forename: Melissa A
authors.initials: MA
authors.lastname: Denecke
authors.forename: Th
authors.initials: T
authors.lastname: Fanghänel