General Information:
Chemical Formula:(Na,Ca)2BeSi2(O,OH,F)7
Composition:(Molecular Weight = 235.92 gm)Sodium 14.62 %
NaCalcium 8.49 %
CaBeryllium 3.82 %
BeSilicon 23.81 %
SiHydrogen 0.90 %
H Oxygen 42.72 %
O Fluorine 5.64 %
F Empirical Formula: Na1.5Ca0.5BeSi2O4.2(OH)2.1F0.7
Locality:Langesundfiord district, southern Norway.
Physical Properties: Cleavage:[???] Good, [???] Good, [???] Distinct
Color:white, greenish yellow, yellow, or light green.
Density:2.96
Diaphaniety:Transparent to translucent
Habits:Tabular - Form dimensions are thin in one direction., ,
Hardness:4 - Fluorite
Luminescence:Fluorescent.
Luster:Vitreous (Glassy)
Streak:white
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