Markascherite, Cu2(MoO4)(OH)4, is a secondary hydroxyl copper molybdate associated with brochantite, antlerite, lindgrenite, wulfenite, natro jarosite, and chalcanthite. The type locality is the Childs-Adwinkle mine, Copper Creek, Pinal County, Arizona (Yang et. al 2012). Type material consists of bladed transparent green crystals to 0.5 mm. Markascherite is monoclinic and is dimorphic with orthorhombic szenicsite. It is named after Mark Goldberg Ascher, a Tucson, Arizona, mineral collector and engineer who first discovered it.
Dr. William R. Hodgson is professor emeritus in the Department of Speech, Language, and Hearing Sciences at the University of Arizona in Tucson.