Reinerite is a rare arsenite (arsenate(III)) mineral with chemical formula Zn3(AsO3)2.
Reinerite has a relative hardness of 5 to 5.5 on the Mohs Scale which is equivalent to that of a knife blade and or shard of glass.
It has a density of 4.27 g/cm3,[2] and it exhibits a nonmetallic luster that may be described as glassy or vitreous.
At the Tsumeb location, Reinerite develops within the polymetallic lead-zinc-copper deposit, 800 m (2,600 ft) below the surface, in the second oxidation zone.
[5] It occurs in association with chalcocite, bornite, willemite, smithsonite, hydrozincite, hemimorphite, adamite, olivenite and gebhardite.