Anhydrous molybdate, paramorph of szenicsite
Specific gravity: 4.216 calculated
Hardness: 3½ to 4
Solubility: Insoluble in water, acetone, or hydrochloric acid
To date (April 2021) markascherite has been found only at the type locality.
At the type locality, the Childs-Adwinkle mine, Copper Creek, Bunker Hill District, Pinal county, Arizona, USA, markascherite is of secondary origin and is associated with brochantite, antlerite, lindgrenite, wulfenite, natrojarosite and chalcanthite (AM 97.197-202). It is formed by weathering of primary molybdenite, bornite, chalcocite and chalcopyrite in a breccia pipe (HOM, Mindat).
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