Okanoganite-(Y)

General Information:
 Chemical Formula:
(Na,Ca)3(Y,Ce)12Si6B2O27F14
 Composition:
(Molecular Weight = 2,190.38 gm)
Sodium 2.36 % Na
Calcium 1.37 % Ca
Cerium 19.19 % Ce
Yttrium 36.53 % Y 
Silicon 7.69 % Si
Boron 0.99 % B 
Oxygen 19.72 % O 
Fluorine 12.14 % F 
 Empirical Formula:
Na2.25Ca0.75Y9Ce3Si6B2O27F14
 IMA Status:
Approved IMA 1987
Physical Properties:
 Cleavage:
None
 Color:
light brown or light pink.
 Density:
4.35
 Hardness:
4 - Fluorite
 Streak:
white
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