General Information:
Chemical Formula:
(Ca,Na)2Be[(Si,Al)2O6(F,OH)]
Composition:
(Molecular Weight = 241.15 gm)
Sodium 9.53 % Na
Calcium 16.62 % Ca
Beryllium 3.74 % Be
Aluminum 11.19 % Al
Silicon 11.65 % Si
Hydrogen 0.21 % H
Oxygen 43.13 % O
Fluorine 3.94 % F
Empirical Formula:
CaNaBeSiAlO6F0.5(OH)0.5
Environment:
Nepheline-syenite pegmatite.
Locality:
Langesundfiord district of southern Norway.
Name Origin:
Named from the Greek for "honey" and "to appear" in allusion to the color.
Physical Properties:
Cleavage:
[010] Perfect, [001] Distinct
Color:
colorless, yellow, yellowish red, or red.
Density:
3.01 - 3.03, Average = 3.01
Diaphaniety:
Transparent to translucent
Habits:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Tabular - Form dimensions are thin in one direction.,
Hardness:
5-5.5 - Apatite-Knife Blade
Luster:
Vitreous (Glassy)
Streak:
white
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