Arsendescloizite , Mimetite Locality: Ojuela Mine, Mapimí , Municipio de Mapimí , Durango , Mexico ( Locality at mindat.org ) Green Arsenodescloizite with yellowish mimetite. Picture width 3 mm. Collection and photograph Christian Rewitzer — Photo: Christian Rewitzer · CC BY-SA 3.0
Arsendescloizite
A lead-zinc arsenate approved in 1982; it is the arsenic analogue of descloizite.
Intro adapted from Wikipedia (CC BY-SA).
Arsendescloizite is an IMA-recognized mineral species in the arsenate class, with the chemical formula PbZn(AsO₄)(OH).
It crystallizes in the orthorhombic crystal system (space group P2_12_12_1). It is a member of the Adelite structural group.
Key properties: Mohs hardness 4–5; specific gravity 5.67; White streak; Subadamantine luster; optically biaxial.
IMA symbol Adcz, IMA status: approved, named in 1979.
Found as a secondary mineral in oxidized hydrothermal polymetallic deposits.
It is found associated with Tennantite, chalcocite, willemite, mimetite, quartz, goethite (Tsumeb, Namibia).
As the arsenate analog of descloizite.