Tatarskite

General Information:
 Chemical Formula:
Ca6Mg2(SO4)2(CO3)2Cl4(OH)4·7(H2O)
 Composition:
(Molecular Weight = 795.36 gm)
Calcium 30.23 % Ca
Magnesium 6.11 % Mg
Hydrogen 2.28 % H 
Carbon 3.02 % C 
Sulfur 8.06 % S 
Oxygen 50.29 % O 
 Empirical Formula:
Ca6Mg2(SO4)2(CO3)2(OH)4·7(H2O)
 Environment:
Found in a drill core of marine evaporite deposits.
 IMA Status:
Approved IMA 1963
 Locality:
Caspian Depression, Kazakhstan.
 Name Origin:
Named for Vitalii Borisovich Tatarskii (1907-), Russian mineralogist, Leningrad University.
Physical Properties:
 Cleavage:
[???] Fair, [???] Fair
 Color:
colorless or light yellow.
 Density:
2.341
 Diaphaniety:
Transparent
 Habits:
Crystalline - Coarse - Occurs as well-formed coarse sized crystals., ,
 Hardness:
2.5 - Finger Nail
 Luster:
Vitreous - Pearly
 Streak:
white
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