Crystals of coexisting alunite and jarosite, Goldfield, Nevada
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Abstract
Alunite (KAl3 (SO4 )2(OH)6) and jarosite (KFe3(SO4)2(OH)6) coexist in optically continuous crystals in a sample from the Goldfield mining district, Esmeralda County, Nev. Beam scans with an electron microprobe indicate that no intermediate minerals of the solid-solution series alunite-jarosite occur in these crystals. An Eh-pH diagram demonstrating the equilibrium relations between alunite, jarosite, and geothite suggests the crystals most likely developed by a rise in Eh, which oxidized ferrous to ferric iron, thus allowing jarosite to precipitate.
Suggested Citation
Keith, W.J., Calk, L., and Ashley, R.P., 1980, Crystals of coexisting alunite and jarosite, Goldfield, Nevada: U.S. Geological Survey Professional Paper 1124, iii, 5 p., https://doi.org/10.3133/pp1124C.
ISSN: 2330-7102 (online)
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Crystals of coexisting alunite and jarosite, Goldfield, Nevada |
| Series title | Professional Paper |
| Series number | 1124 |
| Chapter | C |
| DOI | 10.3133/pp1124C |
| Year Published | 1980 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Description | iii, 5 p. |
| Larger Work Type | Report |
| Larger Work Subtype | USGS Numbered Series |
| Larger Work Title | Shorter contributions to mineralogy and petrology, 1979 |
| Country | United States |
| State | Nevada |
| City | Goldfield |