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About FluorcalciobritholiteHide

Pinkish to brown
Specific Gravity:
Crystal System:
The name follows convention and denotes its dominant fluorine and calcium content and its relationship to other britholite group minerals.
A mineral in the Britholite Group of the Apatite Supergroup. Defined as a distinct mineral by Pekov et al. (2007).

Classification of FluorcalciobritholiteHide

Approval Year:
First Published:

9 : SILICATES (Germanates)
A : Nesosilicates
H : Nesosilicates with CO3, SO4, PO4, etc.

52 : NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
4 : Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination

Physical Properties of FluorcalciobritholiteHide

Transparent, Translucent
Pinkish to brown
5½ on Mohs scale
4.2 g/cm3 (Measured)    

Optical Data of FluorcalciobritholiteHide

Uniaxial (-)
RI values:
nω = 1.735(5) nε = 1.730(5)
Max Birefringence:
δ = 0.005
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:

Chemical Properties of FluorcalciobritholiteHide


Crystallography of FluorcalciobritholiteHide

Crystal System:
Class (H-M):
6/m - Dipyramidal
Space Group:
Cell Parameters:
a = 9.58(7) Å, c = 6.985(4) Å
a:c = 1 : 0.729
Unit Cell V:
555.2 ų
long-prismatic hexagonal crystals up to 0.5 x 10 mm

X-Ray Powder DiffractionHide

Powder Diffraction Data:
3.51 Å(45)
3.15 Å(70)
2.85 Å(100)
2.78 Å(60)
1.965 Å(25)
1.931 Å(20)
1.236 Å(25)
1.122 Å(30)

Geological EnvironmentHide

Geological Setting:
In veinlets in an alkaline complex

Type Occurrence of FluorcalciobritholiteHide

General Appearance of Type Material:
Grains and minute elongated crystals
Place of Conservation of Type Material:
Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, no. 3420/1.
Associated Minerals at Type Locality:
Pekov, Igor V., Pasero, Marco, Yaskovskaya, Asiya N., Chukanov, Nikita V., Pushcharovsky, Dmitry Yu., Merlino, Stefano, Zubkova, Natalia V., Kononkova, Natalia N., Men'shikov, Yury P., Zadov, Aleksandr E. (2007) Fluorcalciobritholite, (Ca,REE)5[(Si,P)O4]3F, a new mineral: description and crystal chemistry. European Journal of Mineralogy: 19: 95-103.

Synonyms of FluorcalciobritholiteHide

Other Language Names for FluorcalciobritholiteHide

Simplified Chinese:氟硅磷灰石

Relationship of Fluorcalciobritholite to other SpeciesHide

Other Members of this group:
Britholite-(Ce)(Ce,Ca)5(SiO4)3OHHex. 6/m : P63/m
Britholite-(Y)(Y,Ca)5(SiO4)3OHHex. 6/m : P63/m
Fluorbritholite-(Ce)(Ce,Ca)5(SiO4)3FHex. 6/m : P63/m
Fluorbritholite-(Y)(Y,Ca)5(SiO4)3FHex. 6/m : P63/m

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Fluorcalciobritholite associated with AlbiteNa(AlSi3O8)
1 photo of Fluorcalciobritholite associated with NephelineNa3K(Al4Si4O16)

Related Minerals - Nickel-Strunz GroupingHide

9.AH.10Tundrite-(Ce)Na2Ce2Ti(SiO4)(CO3)2O2Tric. 1 : P1
9.AH.20TernesiteCa5(SiO4)2(SO4)Orth. mmm (2/m 2/m 2/m) : Pnma
9.AH.25Britholite-(Ce)(Ce,Ca)5(SiO4)3OHHex. 6/m : P63/m
9.AH.25Britholite-(Y)(Y,Ca)5(SiO4)3OHHex. 6/m : P63/m
9.AH.25ChlorellestaditeCa5(SiO4)1.5(SO4)1.5ClHex. 6/m : P63/m
9.AH.25Fluorbritholite-(Ce)(Ce,Ca)5(SiO4)3FHex. 6/m : P63/m
9.AH.25HydroxylellestaditeCa5(SiO4)1.5(SO4)1.5(OH)Hex. 6/mmm (6/m 2/m 2/m) : P63/mcm
9.AH.25MattheddleitePb5(SiO4)1.5(SO4)1.5(Cl,OH)Hex. 6/m : P63/m
9.AH.25Fluorbritholite-(Y)(Y,Ca)5(SiO4)3FHex. 6/m : P63/m

Related Minerals - Dana Grouping (8th Ed.)Hide,Ca)5(SiO4)3FHex. 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 FluorcalciobritholiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Pekov, Igor V., Pasero, Marco, Yaskovskaya, Asiya N., Chukanov, Nikita V., Pushcharovsky, Dmitry Yu., Merlino, Stefano, Zubkova, Natalia V., Kononkova, Natalia N., Men'shikov, Yury P., Zadov, Aleksandr E. (2007) Fluorcalciobritholite, (Ca,REE)5[(Si,P)O4]3F, a new mineral: description and crystal chemistry. European Journal of Mineralogy: 19: 95-103.
Tait, K., Poirier, G., Rowe, R., Piilonen, P.C. (2008) New mineral names. American Mineralogist: 93: 252-256.

Internet Links for FluorcalciobritholiteHide

Localities for FluorcalciobritholiteHide

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.
  • Rhineland-Palatinate
    • Mayen-Koblenz
      • Mendig
Schäfer, Ch. & Schäfer, H. (2018) Über Dawsonit, Britholith, Ferriallanit und einige Amphibole aus den Auswürflingen des Laacher Vulkans, Der Aufschluss, Vol. 69(4), 201-219
  • Batken Region
Pautov, L. A., Karpenko, V. Y., & Agakhanov, A. A. (2013) Baratovite-katayamalite Minerals from the Hodzha-achkan Alcaline Massif (Kirgizia). New Data on Minerals. 48:12-36
  • Nordland
    • Hamarøy
Selbekk, R. S., Husdal, T. A. & Berg, H-J. (2010): Nye mineraler for Norge i 2010. Stein. 37 (4): 24-26
Russia (TL)
  • Murmansk Oblast
    • Khibiny Massif
      • Kukisvumchorr Mt
        • East slope
European Journal of Mineralogy 19, 95-103(2007)
D. R. Zozulya, L. M. Lyalina, Ye. E. Savchenko (2015): Britholite ores of the Sakharjok Zr–Y–REE deposit, Kola Peninsula: Geochemistry, mineralogy, and formation stages. Geochemistry International, 53, 892-902.
  • Trenčín Region
    • Považská Bystrica District
Uher, P., Ondrejka, M., Bačík, P., Broska, I. and Konečný, P. (2015): Britholite, monazite, REE-carbonates and calcite: products of hydrothermal alteration of allanite and apatite in A-type granite from Stupné, Western Carpathians, Slovakia. Lithos, 236-237, 212-225.
Mineral and/or Locality  
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