Arsenbrackebuschite

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
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