Arsenohopeite
Arsenohopeite is an IMA-recognized mineral species in the arsenate class, with the chemical formula Zn₃(AsO₄)₂·4H₂O.
It crystallizes in the orthorhombic crystal system (space group Pnma). It is a member of the Hopeite structural group.
Key properties: Mohs hardness 3; specific gravity 3.42; White streak; Vitreous luster; optically biaxial.
IMA symbol Ahop, IMA status: approved, named in 2010.
A rare secondary mineral produced through alteration of tennantite-rich ore in the oxidized zone of a dolostone-hosted, polymetallic, hydrothermal ore deposit.
It is found associated with Köttigite, adamite, leiteite, schneiderhöhnite.
The name refers to the relationship to hopeite [Zn3(PO4)2·4H2O], as its arsenate analogue.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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