General Information:
Chemical Formula:
Mn++3As+++204(OH)4
Composition:
(Molecular Weight = 446.68 gm)
Manganese 36.90 % Mn
Arsenic 33.55 % As
Hydrogen 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
More details...