| Reference Type | Journal (article/letter/editorial) |
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| Title | A silver-palladium alloy from the Bahia lateritic gold deposit, Carajas, Brazil |
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| Journal | Mineralogical Magazine | ISSN | 0026-461X |
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| Authors | Zang, Weisheng | Author |
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| Fyfe, William S. | Author |
| Barnett, Robert L. | Author |
| Year | 1992 (March) | Volume | 56 |
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| Issue | 382 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_56/56-382-53.pdf+ |
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| DOI | doi:10.1180/minmag.1992.056.382.06Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 1784 | Long-form Identifier | mindat:1:5:1784:2 |
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| GUID | 0 |
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| Full Reference | Zang, Weisheng, Fyfe, William S., Barnett, Robert L. (1992) A silver-palladium alloy from the Bahia lateritic gold deposit, Carajas, Brazil. Mineralogical Magazine, 56 (382) 47-51 doi:10.1180/minmag.1992.056.382.06 |
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| Plain Text | Zang, Weisheng, Fyfe, William S., Barnett, Robert L. (1992) A silver-palladium alloy from the Bahia lateritic gold deposit, Carajas, Brazil. Mineralogical Magazine, 56 (382) 47-51 doi:10.1180/minmag.1992.056.382.06 |
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| In | (1992, March) Mineralogical Magazine Vol. 56 (382) Mineralogical Society |
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| Abstract/Notes | AbstractA silver-palladium alloy with structural formula close to AgPd has been found in laterite from the Bahia lateritic gold deposit. The alloy occurs in a void of an iron oxide nodule, associated with goethite and hematite. The angular shape and protuberances of the alloy grains suggest crystal growth in a lateritic environment, indicating that the alloy is a secondary mineral precipitated during lateritisation. The oxidation of sulphides of the parent rocks probably favoured the migration of palladium and silver as transient thiosulphate and sulphite complexes. Destruction of the thiosulphate and sulphite ligands could result in precipitation of both palladium and silver as an alloy. Eh-pH phase diagrams for Pd-H2O-C1 and Ag-H2O-C1 systems show that both palladium and silver are stable in lateritic environments under lower redox potentials. Such an environment may exist at the top of the ferruginous zone due to the abundant organic matter near the surface. |
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