plumbojarosite

plumbojarosite

[¦pləm·bō·jə′rō‚sīt]
(mineralogy)
PbFe6(SO4)4(OH)12 A mineral composed of basic lead iron sulfate; it is isostructural with jarosite.
References in periodicals archive ?
Plumbojarosite has also been identified in some of this material (R.
At the Reward mine plumbojarosite occurs as small (to 0.
Within the oxidized zones, the primary sulfide minerals were commonly converted to limonite, pyrolusite, cerussite, anglesite, argentojarosite and plumbojarosite (basic sulfates of Fe), and native silver, with traces of malachite and azurite.
The lead and precious metal values are suspected to come primarily from plumbojarosite.
Vein Minerals Adamite Goethite Arsenopyrite Gold Austinite Hemimorphite Barite Malachite Beudantite Mimetite Calcite Smithsonite Cerussite Sphalerite Chalcopyrite Plumbojarosite Chlorargyrite Pyrite Chrysocolla Rosasite Conichalcite Tetrahedrite Fluorite Willemite Galena Wulfenite
The next section of the manto was named the Gypsum Pillar section; it extended for 125 meters, and yielded the first substantial production of hard, high grade lead ore enclosing lenses of plumbojarosite (containing 16% lead) in a bed up to 10 feet thick overlying a gypsum layer.
In the siliceous-limonite of the Adolf and the Audrassy III sections, plumbojarosite has been found as coatings and very rarely in small cavities as pale brown, tabular crystals up to 1 mm forming densely intergrown aggregates.
Plumbojarosite occurs as a component of the gossan at the Brenner mine.
5 cm across the tops, in jumbled groups, either loose or on yellow-brown microcrystallized plumbojarosite matrix.
The mineralogy and geochemistry of this gossan have been described by Nickel (1982), who noted the occurrence of a number of secondary ore minerals including malachite, azurite, chrysocolla, pseudomalachite, cerussite, alunite, jarosite, plumbojarosite, osarizawaite, plumbogummite, duftite, mimetite, fornacite, wulfenite, mottramite, iodargyrite, native silver and a silver-mercury amalgam.