Halotrichite
Template:Short description Template:Infobox mineral
Halotrichite, also known as feather alum, is a highly hydrated sulfate of aluminium and iron. Its chemical formula is Template:Chem2. It forms fibrous monoclinic crystals. The crystals are water-soluble.
It is formed by the weathering and decomposition of pyrite commonly near or in volcanic vents. The locations of natural occurrences include: the Atacama Desert, Chile; Dresden in Saxony, Germany; San Juan County, Utah; Iceland; Idrija, Slovenia; and Mont Saint-Hilaire, Canada.
The name is from Latin: halotrichum for salt hair which accurately describes the precipitate/evaporite mineral.[1]
- Gallery
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Halotrichite from California
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Halotrichite from the abandoned Golden Queen mine on Soledad Mountain south of Mojave, California
References
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