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Abstract
Compositions on the join Cu 2 S-Ag 2 S were studied with X-ray diffractometer heating stage. Low-temperature phases, which break down at temperatures between 67 degrees and 119 degrees C, are chalcocite, stromeyerite, Cu (sub O.8) Ag (sub 1.2) S, jalpaite, and acanthite. High-temperature phases, all cation-disordered, are hexagonal close-packed (high chalcocite), face-centered cubic (high digenite), and body-centered cubic (argentite) in order of increasing Ag. Above 593 degrees C, the face-centered cubic phase occupies the whole field of the join, extending also to more sulfur-rich compositions. Although reaction rates are extremely rapid in the system, and the high-temperature phases are unquenchable, pseudomorphs and textures in natural specimens can be informative.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | The system Cu-Ag-S |
| Series title | Economic Geology |
| DOI | 10.2113/gsecongeo.61.1.1 |
| Volume | 61 |
| Issue | 1 |
| Year Published | 1966 |
| Language | English |
| Publisher | Society of Economic Geologists |
| Description | 26 p. |
| First page | 1 |
| Last page | 26 |
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