Effect of ionic environment on the transport of cesium ion in alkali chloride solutions from radio tracer studies

The rate of transport (diffusion) of cesium ion in aqueous solutions of all the alkali metal chlorides together with cesium iodide and cesium fluoride (generalized name MX) at 25 °C temperature has been measured by the radioactive tracer technique using 134Cs as tracer, over the 0.04.0 M. These diffusion data along with other transport data in the literature are used to calculate the velocity correlation coefficients (VCC) for Cs-M, Cs-H2O and Cs-X, which actually represent the ensemble average time integrals of the velocity correlation functions of the referred pair of species. The concentration dependence of VCC gives a quantitative estimate of the influence of environment and its dynamics on the transport of cation cesium in a highly correlated system like aqueous solutions of 1-1 electrolytes.