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Abstract
The kinematic viscosity v of Cs x CsI1-x molten materials has been measured in the metallic range, i.e. at small CsI molar fractions, at temperatures above the liquidus line of the phase diagram. The temperature dependence of the viscosity is of the Arrhenius type. Dissolution of salt in the metal reduces the viscosity in an unexpected manner. A quantitative analysis of the results is given in terms of a hard-sphere model involving the free-volume formalism of Cohen and Turnbull (1959, 1970) and the one-component plasma (OCP) model of Pollock and Hansen (1973) previously used by one of the authors to account for neutron diffraction results.