Markascherite
Markascherite is an IMA-recognized mineral species in the molybdate class, with the chemical formula Cu₃(MoO₄)(OH)₄.
It crystallizes in the monoclinic crystal system (space group P2_1/m).
Key properties: Mohs hardness 3.5–4; specific gravity 4.216; Green streak; Subadamantine luster; optically biaxial.
IMA symbol Mac, IMA status: approved, named in 2010.
A secondary mineral formed by weathering of a mineralized (molybdenite, bornite, chalcocite, chalcopyrite) breccia pipe.
It is found associated with Brochantite, antlerite, lindgrenite, wulfenite, natrojarosite, chalcanthite.
The mineral was named to honor Mark Goldberg Ascher, a mineral collector and engineer in Tucson, Arizona, USA, who found the first specimen.
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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