General Information:
Chemical Formula:
NaBa2(Ce,La)2Mn++Ti2Si8O26(F,OH)·(H2O)
Composition:
(Molecular Weight = 1,405.15 gm)
Barium 19.55 % Ba
Sodium 1.64 % Na
Lanthanum 4.94 % La
Cerium 14.96 % Ce
Titanium 6.81 % Ti
Manganese 3.91 % Mn
Silicon 15.99 % Si
Hydrogen 0.16 % H
Oxygen 31.03 % O
Fluorine 1.01 % F
Empirical Formula:
NaBa2Ce1.5La0.5Mn2+Ti2Si8O26F0.75(OH)0.25·(H2O)
IMA Status:
Approved IMA 1988
Physical Properties:
Cleavage:
[001] Perfect, [100] Indistinct
Color:
yellow, yellow brown, light brown, or light yellow.
Density:
3.92
Diaphaniety:
Transparent
Hardness:
5.5-6 - Knife Blade-Orthoclase
Luster:
Vitreous (Glassy)
Streak:
white
More details...