General Information:
Chemical Formula:Mn++3As+++204(OH)4
Composition:(Molecular Weight = 446.68 gm)Manganese 36.90 %
MnArsenic 33.55 %
AsHydrogen 0.90 %
H Oxygen 28.65 %
O Empirical Formula: Mn-2+3As2O4(OH)4
IMA Status:Approved IMA
Locality:Langban, Varmland, Sweden.
Name Origin:Named after the composition (Manganese, Arsenic).
Physical Properties: Cleavage:[001] Perfect
Color:pink brown.
Density:3.64
Diaphaniety:Translucent
Habits:Hexagonal - Six-sided crystal shape in cross-section or habit., Massive - Uniformly indistinguishable crystals forming large masses.,
Hardness:3 - Calcite
Luster:Vitreous (Glassy)
Streak:light pink
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