Evaluations of some main characteristics of the tri- and tetravalent actinide aquo ions

Abstract

We have developed a semi-theoretical model for calculation and prediction of thermodynamic properties of aquo ions. The main purpose is to find a general approach, which could be applied to the totality of the monatomic ions and especially to actinides. To apply the model in practice a Fortran program HYDRA has been created. Free hydration energies of hydration and entropies of the aquo ions have been evaluated together with characteristics of these ions: effective charge, hydration numbers, size. From these data, redox potentials have been reevaluated and conductivity of the ions have been determined. © 2002 Atomic Energy Society of Japan.