General Information:
Chemical Formula:
CaZnMn+++(AsO3OH)4(OH)3
Composition:
(Molecular Weight = 491.28 gm)
Calcium 8.16 % Ca
Manganese 11.18 % Mn
Zinc 13.31 % Zn
Arsenic 30.50 % As
Hydrogen 1.03 % H
Oxygen 35.82 % O
Empirical Formula:
CaZnMn3+(AsO3OH)2(OH)3
IMA Status:
Approved IMA 1983
Locality:
Ojuela mine, Mapimi, DGO, Mexico.
Name Origin:
Named for Julius Lothar Meyer (1830-1895), German chemist who developed concepts for the periodic table.
Physical Properties:
Color:
dark reddish orange, reddish brown, or red orange.
Density:
4.23
Diaphaniety:
Transparent to Translucent
Habits:
Druse - Crystal growth in a cavity which results in numerous crystal tipped surfaces., Encrustations - Forms crust-like aggregates on matrix.,
Hardness:
3 - Calcite
Luster:
Vitreous (Glassy)
Streak:
orange
More details...