Abstract: Viscosities of uranium solutions in H₂O and 3 mol/L HNO₃ medium were measured by Ubbelhode flow viscometer in the concentration range of 0.5%-3.0% from 10 °C to 30 °C at 5 °C interval. Viscosity data were interpreted in terms of an empirical equation; h=a_oexp(b_oM+c_oM²). Values of coefficients a_o, b_o and c_o were calculated for all the three systems studied. Flow activation energies and thermodynamic parameters were also evaluated.

Key words: Uranium, Viscosity, Solution, Interaction coefficients, Flow activation energy, Thermodynamic parameters

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