The Diffusion Coefficients and Viscosities of the UO2(NO3)2·2TBP Complex in Organic Solvents

The diffusion coefficients and the solution viscosities of the UO2(NO3)2·2TBP complex in 12 solvents (tributylphosphate, n-hexane, n-dodecane and 9 mixed solvents) at 298 K were determined by use of an analytical ultracentrifuge and an Ubbelohde viscometer. It is shown in the mixed solvents that all systems obeyed the Jones-Dole relation. The product of diffusion coefficient and viscosity is roughly constant, corresponding to an Einstein -Stokes radius of 0.54 nm for the uranium complex.