THE DIFFUSION OF IONS IN INTERLAYER SPACES OF NA-MONTMORILLONITE - EXPERIMENTAL RESULTS

According to the technique developed earlier, the diffusion of phospha te ions and self-diffusion of sodium cations in interlayer spaces of N a-montmorillonite were studied at different concentrations of NaCl in the dispersion medium. On the basis of the experimental results, the d iffusion (self-diffusion) coefficients and the rate constants of adsor ption (isotope exchange) were calculated. With the effect of electrost atic retardation taken into account, the viscosity in 1.2-13-nm-thick liquid symmetrical films was estimated; it was several times higher th an the viscosity in the bulk of the solution.