General Information:
Chemical Formula:
(Mg,Al)6(BO3)3(OH,Cl)4
Composition:
(Molecular Weight = 589.17 gm)
Magnesium 18.56 % Mg
Aluminum 6.87 % Al
Boron 11.01 % B
Hydrogen 0.51 % H
Chlorine 6.02 % Cl
Oxygen 57.03 % O
Empirical Formula:
Mg4.5Al1.5BO33(OH)3Cl
IMA Status:
Approved IMA 1980
Physical Properties:
Cleavage:
[001] Perfect
Color:
light green or silky white.
Density:
2.8 - 2.85, Average = 2.82
Hardness:
5.5 - Knife Blade
Luster:
Silky
Streak:
white
More details...