General Information:
Chemical Formula:(K,Na)2(Nb,Ti)2Si4O12(O,OH)2·4(H2O)
Composition:(Molecular Weight = 642.34 gm)Potassium 9.13 %
K Sodium 1.79 %
NaTitanium 3.73 %
TiNiobium 21.70 %
NbSilicon 17.49 %
SiHydrogen 1.33 %
H Oxygen 44.83 %
O Empirical Formula: K1.5Na0.5Nb1.5Ti0.5Si4O13.5(OH)0.5·4(H2O)
Environment:The mineral formed by the hydrothermal alteration of pyrochlore.
IMA Status:Approved IMA 1995
Locality:Lake Vuoriyarvi and the Vuoriyarvi alkali-ultramafic complex, Kola Peninsula, Russia.
Name Origin:The name reflects the discovery locality.
Physical Properties: Color:white.
Density:2.95
Diaphaniety:Translucent
Habits:Tabular - Form dimensions are thin in one direction., ,
Hardness:4.5 - Between Fluorite and Apatite
Luminescence:Non-fluorescent.
Luster:Vitreous (Glassy)
Streak:white
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