General Information:
Chemical Formula:Na11Nb2TiSi4O12(PO4)2O5F2
Composition:(Molecular Weight = 1,098.85 gm)Sodium 23.01 %
NaTitanium 4.36 %
TiNiobium 16.91 %
NbSilicon 10.22 %
SiPhosphorus 5.64 %
P Oxygen 36.40 %
O Fluorine 3.46 %
F Empirical Formula: Na11Nb2TiSi4O17(PO4)2F2
Environment:Albitized alkalic rocks.
IMA Status:Approved IMA 1973
Locality:Vuonnemi River, Khibiny massif, Kola Peninsula, Russia. Il¡maussaq, Greenland.
Name Origin:Named after its locality.
Physical Properties: Cleavage:[001] Perfect, [???] Very Good, [???] Very Good
Color:light yellow, lemon yellow, or greenish yellow.
Density:3.13
Habits:Platy - Sheet forms (e.g. micas)., Bladed - Aggregates of thin lath-like crystals (e.g. kyanite).,
Hardness:2-3 - Gypsum-Calcite
Luminescence:Fluorescent, Short UV=greenish yellow, Long UV=pale greenish yellow.
Luster:Vitreous - Greasy
Streak:white
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