Strashimirite is a rare monoclinic mineral containing arsenic. It has the chemical formula Cu8(AsO4)4(OH)4·5(H2O).
This mineral was discovered in Zapachitsa (Zapacica) copper deposit, Svoge in 1960, by the Bulgarian mineralogist Jordanka Minceva-Stefanova She named the mineral after Strashimir Dimitrov (1892-1960), Professor in Mineralogy and Petrography at Sofia University The International Mineralogical Association approved it as a new mineral in 1968.
It occurs as a secondary mineral phase in the oxidation zone of copper arsenide deposits. It occurs associated with tyrolite , cornwallite, olivenite, arthurite, chalcophyllite, pharmacosiderite , azurite
Although it remains quite rare, strashimirite has subsequently been identified in a number of locations including: Novoveska Huta in the Czech Republic; on the west flank of Cherbadung (Pizzo Cervandone), Binntal, Valais, Switzerland; in Kamsdorf and Saalfeld, Thuringia, Germany; the Clara mine , near Oberwolfach, Black Forest, Germany; in the Richelsdorf Mountains, Hesse, Germany; Cap Garonne mine, near le Pradet, Var, and Triembach-au-Val, Haut-Rhin, France; Wheals Gorland and Unity, Gwennap, Cornwall, England; the Tynagh mine, near Loughrea, Co. Galway, Ireland; the Majuba Hill mine, Antelope district, Pershing Co. Nevada, US; and the Centennial Eureka mine, Tintic district, Juab Co., Utah, US.