Fluocerite

Fluocerite-(La)
General
CategoryMinerals
Formula(La,Ce)F3
Strunz classification03.AC.15 (03)
Dana classification09.03.04.02 (09)
Crystal systemTrigonal
Crystal classHexagonal scalenohedral
Space groupP3c1 (No. 165)
Unit cell328.80 ų (Calculated from Unit Cell)
Identification
Formula mass196.02
ColourGreenish-yellow
Crystal habitPlaty, tabular
CleavageIndistinct, Imperfect
Mohs scale hardness4-5
LusterVitreous
StreakWhite
DiaphaneityTransparent to translucent
Density5.93
Birefringence0.006
Fluocerite-(Ce)
General
CategoryMinerals
Formula(La,Ce)F3
Strunz classification3/A.10-20
Dana classification9.3.4.1
Crystal systemTrigonal
Crystal classHexagonal Scalenohedral
Unit cell320.86 ų (Calculated from Unit Cell)
Identification
Formula mass196.99
ColourLight yellow; darkening to yellow- and red-brown; colourless to pale pink (transmitted light)
Crystal habitMassive, Primsatic
CleavageDistinct/Good
FractureIrregular/Uneven, Splintery, Sub-Conchoidal
TenacityBrittle
Mohs scale hardness4.5-5
LusterVitreous, Resinous, Pearly
StreakYellow-white
DiaphaneityTransparent to translucent
Specific gravity5.93 - 6.14
Density5.93 - 6.14 g/cm3 (Measured)
Birefringence0.005 - 0.007

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.

This article about a specific halide mineral is a stub. You can help Wikipedia by adding missing information.

Content Disclaimer

Informasi ini disarikan dari Wikipedia dan disajikan kembali untuk tujuan edukasi. Konten tersedia di bawah lisensi CC BY-SA 3.0. Kami tidak bertanggung jawab atas ketidakakuratan data yang bersumber dari kontribusi publik tersebut.

  1. The information displayed on this website is sourced in part or in whole from Wikipedia and has been adapted for the purpose of restating it. We strive to provide accurate and relevant information, however:
  2. There is no guarantee of absolute accuracy. Wikipedia is an open, collaborative project that can be edited by anyone, so information is subject to change.
  3. It is not intended to constitute professional advice. The content displayed is for informational and educational purposes only. For important decisions (e.g., medical, legal, or financial), please consult a professional.
  4. Content copyright. Wikipedia is licensed under the Creative Commons Attribution-ShareAlike License (CC BY-SA). This means that content may be reused with appropriate attribution and shared under a similar license.
  5. Responsible use. Any risk arising from the use of information from this website is entirely the responsibility of the user.