General Information:
Chemical Formula:
(Mg,Fe++)2(Fe+++,Ti,Mg)BO5
Composition:
(Molecular Weight = 205.49 gm)
Magnesium 18.92 % Mg
Titanium 6.99 % Ti
Iron 29.90 % Fe
Boron 5.26 % B
Oxygen 38.93 % O
Empirical Formula:
Mg1.5Fe2+0.5Fe3+0.6Ti0.3Mg0.1BO5
IMA Status:
Approved IMA 1970
Physical Properties:
Cleavage:
[010] Good, [001] Distinct
Color:
black.
Density:
3.63
Diaphaniety:
Transparent to Subopaque
Hardness:
5.5 - Knife Blade
Luster:
Adamantine
Streak:
gray
More details...