General Information:
Chemical Formula:ZnMn+++2O4
Composition:(Molecular Weight = 239.26 gm)Manganese 45.92 %
MnZinc 27.33 %
ZnOxygen 26.75 %
O Empirical Formula: ZnMn3+2O4
Locality:Franklin, New Jersey, USA.
Physical Properties: Cleavage:[001] Perfect
Color:black.
Density:4.85
Diaphaniety:Subtranslucent to opaque
Habits:Massive - Granular - Common texture observed in granite and other igneous rock., ,
Hardness:6 - Orthoclase
Luminescence:Non-fluorescent.
Luster:Sub Metallic
Streak:brownish black
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