General Information:
Chemical Formula:NaCa2SrCe(PO4)3F
Composition:(Molecular Weight = 634.79 gm)Sodium 3.62 %
NaStrontium 13.80 %
SrCalcium 12.63 %
CaCerium 22.07 %
CePhosphorus 14.64 %
P Oxygen 30.24 %
O Fluorine 2.99 %
F Empirical Formula: NaCa2SrCe(PO4)3F
Environment:Carbonitite igneous rocks.
IMA Status:Approved IMA 1995
Locality:Mount Koashva, Khibina alkaline massif, Kola Peninsula, Russia.
Name Origin:For B. N. Delone (Delaunay) (1890-1980), Russian mathematical crystallographer.
Physical Properties: Cleavage:[100] Fair, [001] Fair
Color:bright yellow.
Density:3.92 - 3.95, Average = 3.93
Diaphaniety:Transparent
Habits:Granular - Generally occurs as anhedral to subhedral crystals in matrix., ,
Hardness:5 - Apatite
Luminescence:Non-fluorescent.
Luster:Vitreous (Glassy)
Streak:white
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