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Mineralpedia Details for Manjiroite

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Manjiroite

Manjiroite

Formula
Na(Mn4+,Mn2+)8O16┬ĚnH2
Crystal System
Tetragonal 
Crystal Habit
Massive 
Cleavage
None, None, None 
Luster
Earthy (Dull) 
Color
brownish gray, gray brown, dark brown gray 
Streak
brownish black 
Class
Tetragonal - Dipyramidal 
Fracture
Conchoidal 
Hardness
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Manjiroite from Smartt Mine, Kalahari Mn field, Northern Cape Province, South Africa

Manjiroite
            from Smartt Mine, Kalahari Mn field, Northern Cape Province, South Africa

Compact fibrous crystals in matrix. 

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