Zemkorite

General Information:
 Chemical Formula:
Na2Ca(CO3)2
 Composition:
(Molecular Weight = 206.08 gm)
Sodium 22.31 % Na
Calcium 19.45 % Ca
Carbon 11.66 % C 
Oxygen 46.58 % O 
 Empirical Formula:
Na2Ca(CO3)2
 Environment:
Fracture fillings in unaltered kimberlite found in drill cores.
 IMA Status:
Approved IMA
 Locality:
Udachnaya pipe, Daldyn kimberlite field, Yakutiya, Russa.
 Name Origin:
Named for the Institute of the Earth's Crust (Russian: zemnoy kory = "earth's crust"), Russian Academy of Science, Siberian Branch where the mineral was first studied.
Physical Properties:
 Cleavage:
[???] Perfect
 Color:
colorless.
 Density:
2.46
 Diaphaniety:
Transparent
 Habits:
Tabular - Form dimensions are thin in one direction., ,
 Hardness:
2 - Gypsum
 Luster:
Vitreous - Pearly
 Streak:
white
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