The technique of reflection electron diffraction is used to study the structure of four different phases of copper sulphide which are formed on the basal planes of CdS single crystals when they are dipped in aqueous solutions containing cuprous or cupric ions. Chalcocite (Cu2S), djurleite (Cu1.96S), and covellite (CuS) are produced by varying the conditions and composition of the plating solution, and a hexagonal CuxS phase is observed to arise as a consequence of a phase transformation of djurleite. The results show that each phase exhibits an orientational relationship with the CdS substrate and is present in the form of grains, the unit cells of which are aligned along each of the three a-axes in the basal plane of the CdS.
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Russell et al. (1978) studied this question.
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