General Information:
Chemical Formula:
Pb3Mn(As+++O3)2(As+++O2OH)
Composition:
(Molecular Weight = 1,046.31 gm)
Manganese 5.25 % Mn
Arsenic 21.48 % As
Hydrogen 0.10 % H
Lead 59.41 % Pb
Oxygen 13.76 % O
Empirical Formula:
Pb3Mn2+(AsO3)2(AsO2OH)
Physical Properties:
Cleavage:
[010] Perfect
Color:
brown, yellow, yellow brown, or sulfur yellow.
Density:
6.1 - 7.1, Average = 6.6
Diaphaniety:
Translucent
Hardness:
2-3 - Gypsum-Calcite
Luster:
Vitreous - Adamantine
Streak:
yellow
More details...