General Information:
Chemical Formula:
Pb2(Fe++,Zn)(AsO4)2·(H2O)
Composition:
(Molecular Weight = 768.49 gm)
Zinc 2.13 % Zn
Iron 5.45 % Fe
Arsenic 19.50 % As
Hydrogen 0.26 % H
Lead 53.92 % Pb
Oxygen 18.74 % O
Empirical Formula:
Pb2Fe2+0.75Zn0.25(AsO4)2·(H2O)
IMA Status:
Approved IMA 1977
Physical Properties:
Cleavage:
[010] Perfect
Color:
honey yellow.
Density:
6.54
Diaphaniety:
Transparent to Translucent
Hardness:
4.5 - Between Fluorite and Apatite
Luster:
Adamantine - Resinous
Streak:
brownish yellow
More details...