HgCl 2AgI reaction in solid state

Ag HgClI ₂ and Ag HgCl ₂I were obtained by the interaction of HgCl ₂ and AgI in the solid state at 100°C. A diffusion-controlled HgCl ₂AgI reaction proceeds via counterdiffusion of Ag ⁺ and Hg ²⁺ and its activation energy is 23.90 kcal/mole. At the start, the process is surface or grain boundary diffusion-controlled having an activation energy of 8.32 kcal/mole. Different molar ratios of the reactants gave rise to different end products. The reaction was followed by X-ray, chemical analysis, thermal, conductivity measurements. Evidence for the formation of solid solution between Ag ₂HgI ₄ and AgCl is reported.