Transport in Aqueous Solutions of Group IIB Metal Salts (298.15 K): Part 3.—Isotopic Diffusion Coefficients for Cadmiuin-115 Ions in Aqueous Cadmium Iodide

Abstract

Cadmium isotopic diffusion coefficients (Daa) were determined in aqueous cadmium iodide in the concentration range 0.1–0.6 mol dm–3. Daa passes through two maxima, one below 0.1 mol dm–3, the other at 0.4 mol dm–3. Irreversible thermodynamic analysis shows that these maxima are due to positive fluctuations in the isotope-to-isotope coupling contributions to Daa. For these studies a modified diaphragm cell technique was developed.