Title: Djurleite, digenite, and chalcocite: Intergrowths and transformations
Abstract:Intergrowths between djurleite (approximately Cu1.94S) and digenite (approximately Cu1.8S) and between djurleite and chalcocite (Cu2S) and the transformation between djurleite (dj) and chalcocite (cc)...Intergrowths between djurleite (approximately Cu1.94S) and digenite (approximately Cu1.8S) and between djurleite and chalcocite (Cu2S) and the transformation between djurleite (dj) and chalcocite (cc) were studied using high-resolution transmission electron microscopy. Pseudohexagonal twins are common in djurleite; crystal blocks are rotated relative to each other around [100], the normal of the close-packed layers, by multiples of 60-degrees. Djurleite and digenite (dg) bands are intergrown, with (111)dg parallel to (100)dj, thereby creating a cubic-hexagonal alternation in the sequence of close-packed layers. The typical orientational relationship between coexisting djurleite and chalcocite is where [001]cc is parallel to [100]dj and [010]cc is parallel to one of the [010] or [012] directions of djurleite. If both djurleite and chalcocite occur in a sample, chalcocite easily converts to djurleite under the electron beam through the rearrangement of Cu atoms. A similar electrochemical transformation probably takes place in Cu2S-CdS solar cells and is the reason for the instability of chalcocite in such devices.Read More
Publication Year: 1994
Publication Date: 1994-04-01
Language: en
Type: article
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Cited By Count: 55
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