Zirconolite

Zirconolite is a mineral, calcium zirconium titanate; formula CaZrTi₂O₇. Some examples of the mineral may also contain thorium, uranium, cerium, niobium and iron; the presence of thorium and/or uranium would make the mineral radioactive. It is black or brown in color.

References

Simple	Anatase Brookite Geikielite Rutile

Mixed	Aeschynite-(Y) Armalcolite Betafite Euxenite Freudenbergite Haggertyite Ilmenite Keilhauite Latrappite Perovskite Polycrase Zimbabweite Zirconolite Zirkelite

Other