Alumopharmacosiderite

General Information:
 Chemical Formula:
KAl4(AsO4)3(OH)4·6·5(H2O)
 Composition:
(Molecular Weight = 748.91 gm)
Potassium 5.22 % K 
Aluminum 14.41 % Al
Arsenic 30.01 % As
Hydrogen 2.29 % H 
Oxygen 48.07 % O 
 Empirical Formula:
KAl4(AsO4)3(OH)4·6.5(H2O)
 IMA Status:
Approved IMA 1981
Physical Properties:
 Color:
white.
 Diaphaniety:
Transparent to Translucent
 Luster:
Vitreous (Glassy)
 Streak:
white
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