Crystals of coexisting alunite and jarosite, Goldfield, Nevada
Professional Paper
1124-C
By: William J. Keith, L. Calk, and R. P. Ashley
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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.
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 |