Diffusion of Potassium‐40 Into an Illite During Prolonged Shaking

Abstract

Abstract The diffusion of K 40 into the clay crystal lattice of an illite was studied at equilibrium concentrations comparable to those occurring under field conditions. Time of equilibration was extended over 16 months. The self‐diffusion constant was found as roughly 1–3 × 10 ‐23 cm 2 sec ‐1 ; the equivalent depth of penetration during the period of investigation amounted to a few Angstroms only.