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Fluocerite-(La)

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About Fluocerite-(La)Hide

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).


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.

X-Ray Powder DiffractionHide

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

Type Occurrence of Fluocerite-(La)Hide

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.20GananiteBiF3

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.
Germany
 
  • Baden-Württemberg
    • Black Forest
      • Wolfach
        • Oberwolfach
          • Rankach valley
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
    • 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
    • Skinnskatteberg
      • Riddarhyttan
Öhman, L. , Nysten, P. and Langhof, J. (2005): Nya Bastnäs i Riddarhytte malmfält. Litiofilen, 22 (1): 14-38
Mineral and/or Locality  
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