Formula: Fe3+(Te4+O3)(OH).H2O
Specific gravity: 3.95
Hardness: 3
Colour: Yellow-green
Solubility: Readily soluble in dilute hydrochloric acid

Hydrothermal environments

Sonoraite is a rare, secondary, tellurium mineral derived from oxidised, telluride-bearing ores (Webmin).


At the type locality, the Moctezuma mine, Moctezuma, Moctezuma Municipality, Sonora, Mexico, sonoraite is a very rare mineral in the oxide zone of a hydrothermal gold-tellurium ore deposit, associated with emmonsite, anglesite, limonite and quartz (HOM). Initially three specimens were found. The first had cavernous anglesite crystals 0.5 to 1.5 mm across implanted upon crystals of emmonsite thickly coating a cavity in limonite-stained quartz. Intimately associated with the emmonsite at the bottom of the cavity was a group of blade-like single crystals and sheaves of sonoraite 0.5 to 1.0 mm across. In the second specimen, sheaves of crystals of sonoraite were implanted on limonite-covered quartz; emmonsite appeared elsewhere on the specimen. The third specimen had several rosettes of sonoraite implanted on limonite; On some of the sonoraite rosettes there was a later growth of emmonsite crystals (AM 53.1818-1832).

At Joe Mine, Cochise County, Arizona, USA, sonoraite is associated with rodalquilarite, emmonsite, jarosite and limonite (HOM).

At the Mohawk Mine, Goldfield, Goldfield Mining District, Esmeralda county, Nevada, USA, sonoraite is associated with emmonsite (HOM).

At the Hoosier Mine, Cripple Creek, Cripple Creek Mining District, Teller county, Colorado, USA, sonoraite is very rare as platy, vitreous, yellow-green crystals to 1 mm in size, with native gold on gossan (Minrec 36.2.179).

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