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Coronadite

Type Locality
Horse-Shoe shaft (Horseshoe Mine), Coronado Mine (Coronado Mining Co. property; Arizona Copper Co. group [in part]), Coronado vein, Copper Plate Gulch, Copper Mountain District (Clifton-Morenci District), Shannon Mts, Greenlee Co., Arizona, USA
Mineral Data
Pb(Mn4+6Mn3+2)O16
Strunz: 
4.DK.05a
Physical Properties
Hardness: 
4.5 - 5.0