Yellow crystals of the extremely rare mineral ferribushmakinite (IMA 2014-055) associated to pale green crystals of the also very rare mineral zinclipscombite (IMA 2006-008) on a matrix of quartz. Both minerals, ferribushmakinite and zinclipscombite are minerals found in only one locality worldwide, that is of course the type locality. From: Silver Coin Mine, Valmy, Nevada, United States of America. — Photo: David Hospital · CC BY-SA 4.0
Ferribushmakinite
Ferribushmakinite is an IMA-recognized mineral species in the phosphate class, with the chemical formula Pb₂Fe³⁺(PO₄)(VO₄)(OH).
It crystallizes in the monoclinic crystal system (space group P2_1/m). It is a member of the Brackebuschite structural group.
Key properties: Mohs hardness 2; specific gravity 6.154; Pale yellow streak; Adamantine luster.
IMA symbol Fbmk, IMA status: approved, named in 2014.
A low-temperature, secondary mineral in the oxidized portion of a quartz vein containing argentiferous galena, sphalerite and pyrite, and cutting phosphatic argillite.
It is found associated with Plumbogummite, mottramite, Br-rich chlorargyrite, barite, quartz.
Signifies the Fe3+ analog of bushmakinite.