General Information:
Chemical Formula:
Ca2(Mg,Mn)2B4O7(OH)6
Composition:
(Molecular Weight = 401.36 gm)
Calcium 19.97 % Ca
Magnesium 9.08 % Mg
Manganese 6.84 % Mn
Boron 10.77 % B
Hydrogen 1.51 % H
Oxygen 51.82 % O
Empirical Formula:
Ca2Mg1.5Mn2+0.5B4O7(OH)6
IMA Status:
Approved IMA 1976
Physical Properties:
Cleavage:
[100] Perfect
Color:
brown.
Density:
2.65
Diaphaniety:
Transparent
Hardness:
4.5 - Between Fluorite and Apatite
Streak:
brownish
More details...