Natanite

General Information:
 Chemical Formula:
Fe++Sn++++(OH)6
 Composition:
(Molecular Weight = 276.60 gm)
Iron 20.19 % Fe
Tin 42.92 % Sn
Hydrogen 2.19 % H 
Oxygen 34.71 % O 
 Empirical Formula:
Fe2+Sn(OH)6
 IMA Status:
Approved IMA 1981
Physical Properties:
 Cleavage:
None
 Color:
greenish brown.
 Density:
4.035
 Diaphaniety:
Transparent
 Hardness:
5 - Apatite
 Luster:
Vitreous (Glassy)
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