General Information:
Chemical Formula:
K3Zr2HSi6O18·n(H2O) n=3 to 7
Composition:
(Molecular Weight = 811.30 gm)
Potassium 14.46 % K
Zirconium 22.49 % Zr
Silicon 20.77 % Si
Hydrogen 0.87 % H
Oxygen 41.41 % O
Empirical Formula:
K3Zr2HSi6O18·3(H2O)
Environment:
Alkalic pegmatites.
Locality:
Mt. Eveslogchorr, eastern Khibiny massif, Kola Peninsula, Russia.
Name Origin:
Named for the close structural similarity to umbite.
Physical Properties:
Cleavage:
[010] Perfect, [100] Good
Color:
colorless, white, or light yellow.
Density:
2.59
Diaphaniety:
Transparent to Translucent
Habits:
Pseudo Hexagonal - Crystals show a hexagonal outline., ,
Hardness:
4.5 - Between Fluorite and Apatite
Luster:
Vitreous - Pearly
Streak:
white
More details...