General Information:
Chemical Formula:
Na10Mn++Ti3Nb3(Si2O7)6(OH)2F·12(H2O)
Composition:
(Molecular Weight = 1,985.39 gm)
Sodium 11.58 % Na
Titanium 7.23 % Ti
Manganese 2.77 % Mn
Niobium 14.04 % Nb
Silicon 16.98 % Si
Hydrogen 1.32 % H
Oxygen 45.13 % O
Fluorine 0.96 % F
Empirical Formula:
Na10Mn2+Ti3Nb3(Si2O7)6(OH)2F·12(H2O)
Environment:
In hyperagpaitic pegmatites. Similar to epistolite and murmanite.
IMA Status:
Approved IMA (Dana # Added)
Locality:
Mount Alluaiv in the northwestern part of the Lovozero Alkaline massif, Kola Peninsula, Russia.
Name Origin:
For the Shkatulka vein in which the mineral was found.
Physical Properties:
Cleavage:
[001] Perfect, [100] Perfect
Color:
colorless, silvery white, light pink, creamy, or yellowish.
Density:
2.7
Diaphaniety:
Transparent to Translucent
Habits:
Tabular - Form dimensions are thin in one direction., Micaceous - Platy texture with "flexible" plates.,
Hardness:
3 - Calcite
Luminescence:
Non-fluorescent.
Luster:
Pearly
Streak:
white
More details...