General Information:
Chemical Formula:
Ca14Nb2(Si2O7)4O6F2
Composition:
(Molecular Weight = 1,553.57 gm)
Calcium 36.12 % Ca
Niobium 11.96 % Nb
Silicon 14.46 % Si
Oxygen 35.01 % O
Fluorine 2.45 % F
Empirical Formula:
Ca14Nb2(Si2O7)4(O)6F2
Environment:
In carbonatites.
Locality:
Oka, Quebec, Canada.
Name Origin:
Named for its composition (Niobium, Calcium).
Physical Properties:
Cleavage:
None
Color:
light yellow.
Density:
3.32
Diaphaniety:
Transparent
Habits:
Square - Occurs as square crystals in shape or outline., ,
Hardness:
6 - Orthoclase
Luster:
Vitreous (Glassy)
Streak:
white
More details...