Fluocerite, also known as tysonite, is a mineral consisting of cerium and lanthanum fluorides, with the chemical formula (Ce,La)F3.[1][2] The end members are classified as two different mineral types depending on the cation, fluocerite-(Ce) and fluocerite-(La), corresponding respectively to lanthanum trifluoride and cerium trifluoride. Both crystallize in the trigonal system.[3]

Fluocerite-(Ce) was first described (without the Ce) in 1845 from hydrothermal veins in granite in Sweden.[4] Fluocerite-(La) was first described in 1969 from the type locality in central Kazakhstan.[3] The name tysonite was given in 1880 to the same type of mineral found in Colorado.[5][6] Tysonite-type structure is used for rare-earth fluorides with the P3c1 space group structure.[7]

References

  1. ^ "Fluocerite-(La) Mineral Data". webmineral.com. Retrieved 2021-02-12.
  2. ^ "Fluocerite-(Ce) Mineral Data". webmineral.com. Retrieved 2021-02-12.
  3. ^ a b "Fluocerite-(La)". www.mindat.org. Retrieved 2021-02-12.
  4. ^ "Fluocerite-(Ce)". www.mindat.org. Retrieved 2021-02-12.
  5. ^ Geijer, Per (1921-01-01). "On Fluocerite and Tysonite". Geologiska Föreningen i Stockholm Förhandlingar. 43 (1–2): 19–23. doi:10.1080/11035892109443886. ISSN 0016-786X.
  6. ^ Allen, Oscar D., and W. J. Comstock. "Bastnaesite and tysonite from Colorado." American Journal of Science 3.113 (1880): 390-393.
  7. ^ Dudney, Nancy J.; West, William C.; Nanda, Jagjit (2015-07-09). Handbook Of Solid State Batteries (Second ed.). World Scientific. ISBN 978-981-4651-91-2.
Allikas: https://en.wikipedia.org/wiki/Fluocerite
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