Jamesite

General Information:
 Chemical Formula:
Pb2Zn2Fe+++5(AsO4)5O4
 Composition:
(Molecular Weight = 1,583.01 gm)
Zinc 8.26 % Zn
Iron 17.64 % Fe
Arsenic 23.66 % As
Lead 26.18 % Pb
Oxygen 24.26 % O 
 Empirical Formula:
Pb2Zn2Fe3+5(AsO4)5O4
 IMA Status:
Approved IMA 1979
Physical Properties:
 Color:
reddish brown.
 Density:
5.1
 Hardness:
3 - Calcite
 Luster:
Subadamantine
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