General Information:
Chemical Formula:BaBe2Si2O7
Composition:(Molecular Weight = 323.52 gm)Barium 42.45 %
BaBeryllium 5.57 %
BeSilicon 17.36 %
SiOxygen 34.62 %
O Empirical Formula: BaBe2(Si2O7)
Environment:Alkalic pegmatites and miarolitic cavities. Also in nephelene syenites and other alkalic intrusions.
Locality:Langbanshyttan, Vermland, Sweden.
Name Origin:Named from the Greek for "heavy", in allusion to its high specific gravity.
Physical Properties: Cleavage:[001] Perfect, [100] Perfect
Color:bluish, colorless, or white.
Density:4.02 - 4.07, Average = 4.04
Diaphaniety:Transparent
Habits:Platy - Sheet forms (e.g. micas)., ,
Hardness:6-7 - Orthoclase-Quartz
Luminescence:Non-fluorescent.
Luster:Vitreous (Glassy)
Streak:white
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