General Information:
Chemical Formula:
Na3Ca2(CO3)3F
Composition:
(Molecular Weight = 348.15 gm)
Sodium 19.81 % Na
Calcium 23.02 % Ca
Carbon 10.35 % C
Oxygen 41.36 % O
Fluorine 5.46 % F
Empirical Formula:
Na3Ca2(CO3)3F
Environment:
Cavities in sodalite syenite inclustions in nepheline syenite.
IMA Status:
Approved IMA
Locality:
Poudrette quarry, Rouville County, Mt. St-Hilaire, Quebec, Canada.
Name Origin:
Named for the locality.
Physical Properties:
Cleavage:
[001] Good, [010] Good
Color:
colorless, reddish brown, or tan.
Density:
2.67
Diaphaniety:
Transparent
Habits:
Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks., ,
Hardness:
3 - Calcite
Luster:
Vitreous - Waxy
Streak:
white
More details...