General Information:
Chemical Formula:
Ca4Mn++6As+++++4O16(OH)8·18(H2O)
Composition:
(Molecular Weight = 1,505.95 gm)
Calcium 10.65 % Ca
Manganese 21.89 % Mn
Arsenic 19.90 % As
Hydrogen 2.94 % H
Oxygen 44.62 % O
Empirical Formula:
Ca4Mn2+6As4O16(OH)8·18(H2O)
IMA Status:
Approved IMA 1983
Physical Properties:
Cleavage:
[0001] Perfect
Color:
dark red.
Density:
2.85
Hardness:
3 - Calcite
Luster:
Vitreous (Glassy)
Streak:
light orange
More details...