The features of molecular characteristic of elemental sulphur have been considered at the temperatures of lower and higher than melting point. Many stage process of sulfide sulphur oxidation with formation of elemental sulphur an their compounds has been proposed taking into account this features. Formation of absolute valence of sulphur has been proceeded only at first stages of sulfide sulphur oxidation till formation of cyclic molecules of sulphur or cleavage of cyclic links in formed moleculas during leaching higher than temperature of melting points of sulphur.

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