Sodalite
Al 6%, Cl 2%, Na 8%, O 24%, Si 6%,

estimated elemental composition and molecular weight 
Minerals with the same name may vary widely in appearance and composition, and very few are >99% (reagent grade) pure.

Gram formula weight (molecular mass) = 969.21


Minerals may vary in elemental composition and impurity levels.
Wikipedia Page:

Sodalite
is defined with respect to the entities below:
The entities below are defined with respect to:
Sodalite
Mineral (generic)


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