Zincgartrellite Locality: Tsumeb Mine (Tsumcorp Mine), Tsumeb , Otjikoto (Oshikoto) Region, Namibia ( Locality at mindat.org ) Greenish-yellow crust of Zincgartrellite. (analysed) Field of view 4 mm. Specimen and photo Leon Hupperichs. — Photo: Leon Hupperichs · CC BY-SA 3.0
Zincgartrellite
Zincgartrellite is an IMA-recognized mineral species in the arsenate class, with the chemical formula PbZn₂(AsO₄)₂(H₂O,OH)₂.
It crystallizes in the triclinic crystal system (space group P-1). It is a member of the Helmutwinklerite structural group.
Key properties: Mohs hardness 4.5; specific gravity 5.3; Yellow streak; Vitreous luster; optically biaxial.
IMA symbol Zgtl, IMA status: approved, named in 1998.
Found in the oxidized portion of a polymetallic deposit.
It is found associated with Wulfenite, duftite, β-duftite, conichalcite, cuproadamite, olivenite, chalcocite.
The name refers to the essential zinc content and relationship to the isostructural mineral gartrellite.