Uklonskovite

Uklonskovite (NaMg(SO4)F) is a mineral often found in a few European rivers.
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General Information:
 Chemical Formula:
NaMg(SO4)F·2(H2O)
 Composition:
(Molecular Weight = 198.39 gm)
Sodium 11.59 % Na
Magnesium 12.25 % Mg
Hydrogen 2.03 % H 
Sulfur 16.16 % S 
Oxygen 48.39 % O 
Fluorine 9.58 % F 
 Empirical Formula:
NaMg(SO4)F·2(H2O)
 IMA Status:
Approved IMA 1964
Physical Properties:
 Color:
colorless.
 Density:
2.42 - 2.5, Average = 2.46
 Diaphaniety:
Transparent
 Luster:
Vitreous (Glassy)
 Streak:
white
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