Zirkelite

(Ti,Ca,Zr)O(2−x)IMA symbolZke[1]Strunz classification4.DL.05Crystal systemIsometricCrystal classHexoctahedral (m3m)
H-M symbol: (4/m 3 2/m)Unit cella = 5.02 Å, Z = 4IdentificationColorBlack, reddish brownCrystal habitCrystalline, metamict, pseudocubicCleavageNoneFractureBrittleLusterResinousStreakBrownish greyDiaphaneitySubtranslucent to opaque[2]Density4.7Other characteristics Radioactive

Zirkelite is an oxide mineral with the chemical formula (Ca,Th,Ce)Zr(Ti,Nb)2O7. It occurs as well-formed fine sized isometric crystals. It is a black, brown or yellow mineral with a hardness of 5.5 and a specific gravity of 4.7.

Name and discovery

Zirkelite was first discovered in Brazil in 1895. It was named for German petrographer Ferdinand Zirkel (1838–1912).

Occurrence

Initial discovery was from the Jacupiranga carbonatite, Sao Paulo, Brazil. It is also found in Canada, Kazakhstan, Norway, Russia, South Africa, the United Kingdom, and the United States.

See also

References

  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.
  2. ^ "Zirkelite Mineral Data".
  • Webmineral data
  • Mindat localities
  • Mineral Data Publishing
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