Vanthoffite

General Information:
 Chemical Formula:
Na6Mg(SO4)4
 Composition:
(Molecular Weight = 546.50 gm)
Sodium 25.24 % Na
Magnesium 4.45 % Mg
Sulfur 23.47 % S 
Oxygen 46.84 % O 
 Empirical Formula:
Na6Mg(SO4)4
Physical Properties:
 Color:
colorless.
 Density:
2.694
 Diaphaniety:
Transparent
 Hardness:
3.5 - Copper Penny
 Luster:
Vitreous - Pearly
 Streak:
white
More details...