Zairite

General Information:
 Chemical Formula:
Bi(Fe+++,Al)3(PO4)2(OH)6
 Composition:
(Molecular Weight = 646.86 gm)
Aluminum 3.13 % Al
Iron 19.43 % Fe
Bismuth 32.31 % Bi
Phosphorus 9.58 % P 
Hydrogen 0.93 % H 
Oxygen 34.63 % O 
 Empirical Formula:
BiFe3+2.25Al0.75(PO4)2(OH)6
 IMA Status:
Approved IMA 1975
Physical Properties:
 Color:
greenish, greenish white, or yellow green.
 Density:
4.37
 Diaphaniety:
Transparent to Translucent
 Hardness:
4.5 - Between Fluorite and Apatite
 Luster:
Vitreous - Resinous
 Streak:
white
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