Cleveite, samarskite and fergusonite contain a little more than monazite.
The rare earth metals are found in the minerals gadolinite, samarskite, fergusonite, euxenite and cerite.
It is usually found associated with tantalum, the chief minerals containing these two elements being tantalite, columbite, fergusonite and yttrotantalite; it is also a constituent of pyrochlor, euxenite and samarskite.
It is found in the minerals gadolinite, cerite, samarskite and fergusonite, and is usually obtained from cerite.
How would you define fergusonite? Add your definition here.