General Information:
Chemical Formula:MnO(OH)
Composition:(Molecular Weight = 87.94 gm)Manganese 62.47 %
MnHydrogen 1.15 %
H Oxygen 36.39 %
O Empirical Formula: Mn3+O(OH)
Name Origin:Named after its chemical composition.
Physical Properties: Cleavage:[010] Perfect
Color:black, gray, or grayish black.
Density:4.3 - 4.4, Average = 4.34
Diaphaniety:Opaque
Habits:Pseudo Orthorhombic - Crystals show an orthorhombic shape., Massive - Fibrous - Distinctly fibrous fine-grained forms., Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmalin e).
Hardness:4 - Fluorite
Luminescence:None.
Luster:Sub Metallic
Streak:dark brown
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