Mechanochemical transformations and reactivity in copper sulphides Original Research Article

Mechanochemical transformations of copper sulphides were induced by processing in a Fritsch Pulverisette 6 planetary mill. The main changes during high-energy milling are the phase transformations of the djurleite Cu1.94S which is the main phase in a starting material. Digenite, which is in fact a group of copper sulphides (Cu1.80S, Cu1.765S and Cu9−xS5, respectively) together with chalcocite (Cu1.96S and Cu2S, respectively) are the main phases among the mechanochemical products. The reactivity of the products is compared to their physico-chemical transformations during high energy milling.