General Information:
Chemical Formula:
Na2KBaMn++8(Ti,Nb)4Si8O32(OH,F,(H2O))7
Composition:
(Molecular Weight = 1,759.06 gm)
Potassium 2.22 % K
Barium 7.81 % Ba
Sodium 2.61 % Na
Titanium 8.17 % Ti
Manganese 24.99 % Mn
Niobium 5.28 % Nb
Silicon 12.77 % Si
Hydrogen 0.32 % H
Oxygen 33.56 % O
Fluorine 2.27 % F
Empirical Formula:
Na2KBaMn2+8Ti3NbSi8O32(OH)4.2F2.1(H2O)0.7
IMA Status:
Approved IMA
Physical Properties:
Cleavage:
[001] Perfect
Color:
orange brown.
Density:
3.71
Diaphaniety:
Transparent to Translucent
Hardness:
4 - Fluorite
Luster:
Vitreous (Glassy)
Streak:
light brown
More details...