General Information:
Chemical Formula:
Na6Mn++Ti[Si10O24(OH)](OH)3·4(H2O)
Composition:
(Molecular Weight = 1,045.69 gm)
Sodium 13.19 % Na
Titanium 4.58 % Ti
Manganese 5.25 % Mn
Silicon 26.86 % Si
Hydrogen 1.16 % H
Oxygen 48.96 % O
Empirical Formula:
Na6Mn2+TiSi10O24(OH)4·4(H2O)
Environment:
In hyperagpaitic pegmatites.
IMA Status:
Approved IMA 1994 (Dana # Added)
Locality:
Mount Alluaiv in the northwestern part of the Lovozero alkaline massif, Kola Peninsula, Russia.
Name Origin:
Named in allusion to it's intermediate position between the layered and banded silicates.
Physical Properties:
Cleavage:
[100] Perfect
Color:
yellow, pinkish yellow, or pink.
Density:
2.42
Diaphaniety:
Transparent to Translucent
Habits:
Anhedral Grains - Granular minerals without the expression of crystal shapes, ,
Hardness:
3-4 - Calcite-Fluorite
Luster:
Vitreous - Greasy
Streak:
white
More details...