Zirconolite information

Zirconolite
Zirconolite
	Black crystal aggregates of the rare zirconium mineral zirconolite.
General
Category	Oxide minerals
Formula; (repeating unit)	CaZrTi2O7
IMA symbol	Zrc
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

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.^[3]

^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
^ Mindat
^ Webmineral data

[1] Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.

[Mindat-2] Mindat

[3] Webmineral data

Zirconolite information

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