Monazite
Ce 1%, La 1%, O 4%, P 1%, Th 1%,

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) = 606.03


Minerals may vary in elemental composition and impurity levels. The formula given is an approximation.
Wikipedia Page:

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


Radioactive material (generic)


chemical compound molecule metal molecular science reaction mechanism ionic material acid base geometry reactivity synthesis science knowledge chemistry Lewis