General Information:
Chemical Formula:
Mn7Zn4(AsO4)2(SiO4)2(OH)8
Composition:
(Molecular Weight = 1,244.19 gm)
Manganese 30.91 % Mn
Zinc 21.02 % Zn
Silicon 4.51 % Si
Arsenic 12.04 % As
Hydrogen 0.65 % H
Oxygen 30.86 % O
Empirical Formula:
Mn2+7Zn4(AsO4)2(SiO4)2(OH)8
IMA Status:
Approved IMA 1979
Physical Properties:
Cleavage:
None
Color:
yellow orange.
Density:
4.17
Hardness:
4.5 - Between Fluorite and Apatite
Luster:
Vitreous (Glassy)
Streak:
light orange
More details...