A subgroup of the Alunite Supergroup. The most common members are jarosite and alunite sensu stricto. See also the Plumbogummite Group and Beudantite ...
THE MINERAL ALUNITE. Chemistry: KAl3(SO4)2(OH)6, Potassium Aluminum Sulfate Hydroxide. Class: Sulfates; Group: Alunite; Uses: As a minor source of alum, potassium and aluminum …
Alunite is often found disseminated in the rocks or in well-defined veins. Notable occurrences in the western USA are at Goldfield, Nevada; Marysvale, Utah; and the Rosita Hills, Colorado. The alunite near Marysvale in Utah occurs in veins …
Mineral Group: Alunite group. Occurrence: Formed between 15 C and 400 C by the action of sulfate, which may be generated from pyrite or solfataric action, on aluminous rocks, …
Alunite is an inconspicuous grayish massive mineral formed by the alteration of pyrite and other sulfides during weathering or solfatara activity. It is probably widespread in Wisconsin but has so far been reported from only one locality.
Alunite, a widespread rock-forming sulfate mineral that occupies pockets or seams in volcanic rocks such as rhyolites, trachytes, and andesites, where it …
L'alunite est un sulfate cristallisant par l'action de l'acide sulfurique sur des roches silicatées alumineuses. L'acide peut provenir de fumerolles volcaniques ou de fluides hydrothermaux ; …
Nevertheless, the existence of two minerals in the alunite supergroup is dependent solely on their D-site predominance of H 3 O +, namely, hydronium jarosite [(H 3 O)Fe 3 (SO 4) 2 (OH) 6] …
Alunite is formed between 15°C (59°F) and 400°C (752°F) by the action of sulfate generated from pyrite or solfataric action on aluminous rocks, along with silicification and kaolinization. It is closely associated with quartz, gypsum, …