Category Oxide minerals Strunz classification 4.DH.30 | Formula
(repeating unit) CaZrTi2O7 Color Black to brown, red | |
Crystal system 2M polytype: monoclinic
3O polytype: orthorhombic
3T polytype: trigonal Crystal class 2M polytype: prismatic (2/m)
3O polytype: dipyramidal (mmm (2/m 2/m 2/m))
3T polytype: trapezohedral (3 2) | ||
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 or uranium would make the mineral radioactive. It is black or brown in color.
References
Zirconolite Wikipedia(Text) CC BY-SA