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4 - 5
Crystal System:
In allusion to its relationship to Fluocerite-(Ce), plus the "-(La)" suffix due to the dominance of lanthanum in the composition.
The lanthanum analogue of Fluocerite-(Ce).

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Classification of Fluocerite-(La)Hide


A : Simple halides, without H2O
C : M:X = 1:3

3 : AX3

8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
7 : Halides of the rare earth metals

Physical Properties of Fluocerite-(La)Hide

4 - 5 on Mohs scale

Optical Data of Fluocerite-(La)Hide

Uniaxial (-)
RI values:
nω = 1.609 nε = 1.603
Max Birefringence:
δ = 0.006
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:

Chemical Properties of Fluocerite-(La)Hide

IMA Formula:

Crystallography of Fluocerite-(La)Hide

Crystal System:
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
Cell Parameters:
a = 7.1871(4) Å, c = 7.3501(5) Å
a:c = 1 : 1.023
Unit Cell V:
328.80 ų (Calculated from Unit Cell)
For synthetic material.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0009547Fluocerite-(La)Cheetham A K, Fender B E F, Fuess H, Wright A F (1976) A powder neutron diffraction study of lanthanum and cerium trifluorides Acta Crystallographica B32 94-971976synthetic0293
0020644Fluocerite-(La)Zalkin A, Templeton D H (1985) Refinement of the trigonal structure of lanthanum trifluoride with neutron diffraction data Acta Crystallographica B41 91-931985synthetic0293
0010627Fluocerite-(La)Mansmann M (1965) Die kristallstruktur von lanthantrifluorid Zeitschrift fur Kristallographie 122 375-3981965synthetic0293
0012039Fluocerite-(La)Schlyter K (1952) On the crystal structure of fluorides of the tysonite LaF3 type Arkiv for Kemi 5 73-821952Osterby, parish of Skedevi, Dalecarlia, Sweden0293
0017899Fluocerite-(La)Oftedal I (1929) Ueber die Kristallstruktur von Tysonit und einigen kuenstlich dargestellten Lanthanidenfluoriden _cod_database_code 1010983 Zeitschrift fur Physikalische Chemie 5 272-29219290293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
3.60 Å(4)
3.19 Å(10)
2.07 Å(6)
2.01 Å(6)
1.796 Å(5.5)
1.736 Å(4)
1.048 Å(7)

Type Occurrence of Fluocerite-(La)Hide

Synonyms of Fluocerite-(La)Hide

Fluocerite (in part)

Other Language Names for Fluocerite-(La)Hide

Related Minerals - Nickel-Strunz GroupingHide

3.AC.15Fluocerite-(Ce)(Ce,La)F3Trig. 3m (3 2/m) : P3c1

Related Minerals - Dana Grouping (8th Ed.)Hide,La)F3Trig. 3m (3 2/m) : P3c1

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

8.7.1Fluocerite-(Ce)(Ce,La)F3Trig. 3m (3 2/m) : P3c1
8.7.3Tveitite-(Y)(Y, Na)6Ca6Ca6F42Trig. 3 : R3
8.7.4Gagarinite-(Y)NaCaYF6Hex. 6/m : P63/m

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Fluocerite-(La)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Trudy Mineralogicheskogo Muzeya Akademiya Nauk SSSR (1969): 19: 236.
Cheetham, A. K., Fender, B. E. F., Fuess, H., Wright, A. F. (1976): A powder neutron diffraction study of lanthanum and cerium trifluorides. Acta Crystallographica B32, 94-97.
American Mineralogist (1984): 69: 566.
American Mineralogist (1987): 72: 1031 (Appendix 2).
Zeitschrift für Kristallographie (1994): 209: 239.
Anthony, Bideaux, Bladh & Nichols (1997), Handbook of Mineralogy, Vol. III: 204.
Crystallography Reports (1998): 43: 557.
Acta Crystallographica: B41: 91-93.

Internet Links for Fluocerite-(La)Hide

Localities for Fluocerite-(La)Hide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Henan
    • Nanyang
      • Xixia County
Qu, K., Sima, X., Zhou, H., Xiao, Z., Tu, J., Yin, Q., ... & Li, J. (2019). In situ LA-MC-ICP-MS and ID-TIMS U-Pb ages of bastnäsite-(Ce) and zircon from the Taipingzhen hydrothermal REE deposit: New constraints on the later Paleozoic granite-related U-REE mineralization in the North Qinling Orogen, Central China. Journal of Asian Earth Sciences, 173, 352-363.
  • Baden-Württemberg
    • Freiburg Region
      • Ortenaukreis
        • Oberwolfach
In several collections but sold specimens were never analytically confirmed - all were Ce-dominant [U. Kolitsch]; U. Kolitsch, J. Gröbner, F. Brandstätter and R. Bayerl (2010): Neufunde aus der Grube Clara im mittleren Schwarzwald (IV): Calcioandyrobertsit, Cotunnit, Gerhardtit, Khaidarkanit, Lukrahnit, Mckinstryit, Moolooit, Rhabdophan-(La), Rouait und Uricit. Lapis 35 (9), 22-27; 62 (in German).
Kazakhstan (TL)
  • Karaganda Region
    • Karkaraly
      • Kent Massif
American Mineralogist (1984): 69: 566.; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
  • Västmanland County
    • Skinnskatteberg
      • Riddarhyttan
Öhman, L. , Nysten, P. and Langhof, J. (2005): Nya Bastnäs i Riddarhytte malmfält. Litiofilen, 22 (1): 14-38
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