Abstract
The characteristic features of the interaction of metal sulphides in sintering, fusion, and coprecipitation from their solutions are discussed in this review. It is shown that the formation of solid substitutional solutions at elevated temperatures is due to the similarity of the effective radii of the metals, determined taking into account the degree of covalence of the M–S bond. It has been found that, as the composition of the reacting sulphides becomes more complicated, their miscibility increases and that the greater the similarity of the ionic radii of the metals the easier the formation of solid solutions of the sulphides when the latter are coprecipitated from solution. The bibliography incorporates 213 references.