Zirconolite

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Zirconolite
General
Category Oxide minerals
Formula
(repeating unit)
CaZrTi2O7
Strunz classification 4.DH.30
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)
Identification
Color Black to brown, red
Luster Resinous, sub-Metallic
Streak Dark brown, brownish yellow
Diaphaneity Translucent, opaque
References [1]

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.[2]

References[edit]