Matter transport in nickel sulphide, β-Ni3S2
Abstract Studies of the kinetics of sulphidation of nickel have been carried out, using the pellet method, in the temperature range of 580–615°C, in sulphur vapour. It has been found that the reaction product, consisting of 99% nickel sulphide, β-Ni 3 S 2 , grows exclusively by the outward diffusion of nickel ions. The chemical diffusion coefficient calculated on the basis of these investigations and nonstoichiometry data is more than two orders of magnitude higher than that obtained by the equilibration method. The obtained results indicate that transport of matter proceeds independently through the cation and anion sublattices.