General Information:
Chemical Formula:
Ca4Be2Al2Si9O26(OH)2
Composition:
(Molecular Weight = 935.07 gm)
Calcium 17.14 % Ca
Beryllium 1.93 % Be
Aluminum 5.77 % Al
Silicon 27.03 % Si
Hydrogen 0.22 % H
Oxygen 47.91 % O
Empirical Formula:
Ca4Be2Al2Si9O26(OH)2
Environment:
Pegmatitic druses in granite.
IMA Status:
Approved IMA 1960
Locality:
Baveno, Lago Maggiore, Piedmont, Italy.
Name Origin:
Named after its locality.
Physical Properties:
Cleavage:
[010] Perfect
Color:
white, green, pink, or brown.
Density:
2.7
Diaphaniety:
Transparent to translucent
Habits:
Lamellar - Thin laminae producing a lamellar structure., Massive - Lamellar - Distinctly foliated fine-grained forms., Platy - Sheet forms (e.g. micas).
Hardness:
5.5 - Knife Blade
Luster:
Vitreous - Pearly
Streak:
white
More details...