General Information:
Chemical Formula:
NaF
Composition:
(Molecular Weight = 41.99 gm)
Sodium 54.75 % Na
Fluorine 45.25 % F
Empirical Formula:
NaF
Environment:
In nepheline-syenite composition rocks.
Locality:
Islands of Los, French Guina.
Name Origin:
Named after the French traveller, Villium.
Physical Properties:
Cleavage:
[100] Perfect, [010] Perfect, [001] Perfect
Color:
colorless, dark red, orange brown, or pink.
Density:
2.79 - 2.8, Average = 2.79
Diaphaniety:
Transparent
Habits:
Massive - Granular - Common texture observed in granite and other igneous rock., Granular - Generally occurs as anhedral to subhedral crystals in matrix.,
Hardness:
2.5 - Finger Nail
Luminescence:
Fluorescent.
Luster:
Vitreous (Glassy)
Streak:
pinkish white
More details...