| Tartalom: |
http://real.mtak.hu/3431/ |
| Archívum: |
MTA Könyvtár |
| Gyűjtemény: |
Status = Published
Type = Article
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| Cím: |
DJURLEITE, DIGENITE, AND CHALCOCITE - INTERGROWTHS AND TRANSFORMATIONS
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| Létrehozó: |
Pósfai, Mihály
Buseck, Peter R.
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| Kiadó: |
Mineralogical Society of America
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| Dátum: |
1994-03
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| Téma: |
QD06 Mineralogy / ásványtan
QE Geology / földtudományok
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| Tartalmi leírás: |
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.
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| Típus: |
Article
PeerReviewed
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| Formátum: |
application/pdf
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| Azonosító: |
Pósfai, Mihály and Buseck, Peter R. (1994) DJURLEITE, DIGENITE, AND CHALCOCITE - INTERGROWTHS AND TRANSFORMATIONS. American Mineralogist, 79 (3-4). pp. 308-315. ISSN 0003-004X
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