General Information:
Chemical Formula:
(Mg,Fe++)3Al4BeSi3O16
Composition:
(Molecular Weight = 553.76 gm)
Magnesium 9.88 % Mg
Beryllium 1.63 % Be
Aluminum 19.49 % Al
Iron 7.56 % Fe
Silicon 15.22 % Si
Oxygen 46.23 % O
Empirical Formula:
Mg2.25Fe2+0.75Al4BeSi3O16
IMA Status:
Approved IMA 1976
Physical Properties:
Cleavage:
[010] Good
Color:
blue or blue green.
Density:
3.58
Streak:
white
More details...