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Fluocerite-(La)

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Formula:
(La,Ce)F3
Hardness:
4 - 5
Crystal System:
Trigonal
Name:
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

Approved
3.AC.15

3 : HALIDES
A : Simple halides, without H2O
C : M:X = 1:3
9.3.4.2

9 : NORMAL HALIDES
3 : AX3
8.7.2

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

Physical Properties of Fluocerite-(La)Hide

Hardness:
4 - 5 on Mohs scale

Optical Data of Fluocerite-(La)Hide

Type:
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:
Moderate

Chemical Properties of Fluocerite-(La)Hide

Formula:
(La,Ce)F3
IMA Formula:
LaF3

Crystallography of Fluocerite-(La)Hide

Crystal System:
Trigonal
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
P3c1
Cell Parameters:
a = 7.1871(4) Å, c = 7.3501(5) Å
Ratio:
a:c = 1 : 1.023
Unit Cell V:
328.80 ų (Calculated from Unit Cell)
Z:
6
Comment:
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:
d-spacingIntensity
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.05ZharchikhiteAlF(OH)2Mon.
3.AC.10MolysiteFeCl3Hex.
3.AC.15Fluocerite-(Ce)(Ce,La)F3Trig. 3m (3 2/m) : P3c1
3.AC.20GananiteBiF3Iso.

Related Minerals - Dana Grouping (8th Ed.)Hide

9.3.4.1Fluocerite-(Ce)(Ce,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.
China
 
  • 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.
Germany
 
  • 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
Sweden
 
  • 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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