Natrofairchildite

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:
Found in burbankite-calcite veins. Possible trimorphous with nyerereite and zemkorite.
 IMA Status:
Approved IMA
 Locality:
Vuori-Jarvi massif, Kola Peninsula, Russia.
 Name Origin:
Named as the Na analog of fairchildite.
Physical Properties:
 Cleavage:
[0001] Distinct
 Color:
white.
 Density:
2.541
 Diaphaniety:
Transparent
 Habits:
Platy - Sheet forms (e.g. micas)., Fan Shaped - Occurs as radiating crystals shaped like a fan., Aggregates - Made of numerous individual crystals or clusters.
 Hardness:
2.5 - Finger Nail
 Luminescence:
Fluorescent, Short UV=orange, Long UV=orange.
 Luster:
Vitreous (Glassy)
 Streak:
white
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