Fluorcalciobritholite
A valid IMA mineral species
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About Fluorcalciobritholite
Formula:
(Ca,REE)5(SiO4,PO4)3F
Colour:
Pinkish to brown
Hardness:
5½
Specific Gravity:
4.2
Crystal System:
Hexagonal
Member of:
Name:
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).
Unique Identifiers
Mindat ID:
29138
Long-form identifier:
mindat:1:1:29138:9
Similar Names
| Fluorcalciobritholite-(Ce) | A synonym of Fluorbritholite-(Ce) |
IMA Classification of Fluorcalciobritholite
Approved
Approval year:
2006
First published:
2007
Type description reference:
Pekov, Igor V., Pasero, Marco, Yaskovskaya, Asiya N., Chukanov, Nikita V., Pushcharovsky, Dmitry Y.u., 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 (1) 95-103 doi:10.1127/0935-1221/2007/0019-0095
Classification of Fluorcalciobritholite
9.AH.25
9 : SILICATES (Germanates)
A : Nesosilicates
H : Nesosilicates with CO3, SO4, PO4, etc.
9 : SILICATES (Germanates)
A : Nesosilicates
H : Nesosilicates with CO3, SO4, PO4, etc.
52.4.12.7
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
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
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Fcbri | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Fluorcalciobritholite
Transparency:
Transparent, Translucent
Colour:
Pinkish to brown
Streak:
White
Hardness:
5½ on Mohs scale
Density:
4.2 g/cm3 (Measured)
Optical Data of Fluorcalciobritholite
Type:
Uniaxial (-)
RI values:
nω = 1.735(5) nε = 1.73(5)
Max. Birefringence:
δ = 0.005
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
Surface Relief:
Moderate
Chemistry of Fluorcalciobritholite
Mindat Formula:
(Ca,REE)5(SiO4,PO4)3F
Element Weights:
Crystallography of Fluorcalciobritholite
Crystal System:
Hexagonal
Class (H-M):
6/m - Dipyramidal
Space Group:
P63/m
Cell Parameters:
a = 9.58(7) Å, c = 6.985(4) Å
Ratio:
a:c = 1 : 0.729
Unit Cell V:
555.2 ų
Z:
2
Morphology:
long-prismatic hexagonal crystals up to 0.5 x 10 mm
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 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) |
Reference:
Pekov, Igor V., Pasero, Marco, Yaskovskaya, Asiya N., Chukanov, Nikita V., Pushcharovsky, Dmitry Y.u., 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 (1) 95-103 doi:10.1127/0935-1221/2007/0019-0095
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 35 : Ultra-alkali and agpaitic igneous rocks |
Geological Setting:
In veinlets in an alkaline complex
Type Occurrence of Fluorcalciobritholite
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:
Reference:
Pekov, Igor V., Pasero, Marco, Yaskovskaya, Asiya N., Chukanov, Nikita V., Pushcharovsky, Dmitry Y.u., 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 (1) 95-103 doi:10.1127/0935-1221/2007/0019-0095
Synonyms of Fluorcalciobritholite
Other Language Names for Fluorcalciobritholite
Relationship of Fluorcalciobritholite to other Species
Member of:
Other Members of Britholite Group:
| Britholite-(Ce) | (Ce,Ca)5(SiO4)3OH | Hex. 6/m : P63/m |
| 'Britholite-(La)' | Ca2(La,Ce,Ca)3(SiO4,PO4)3(OH,F) | |
| Britholite-(Y) | (Y,Ca)5(SiO4)3OH | Hex. 6/m : P63/m |
| 'Calciobritholite' | (Ca,Y)5(SiO4,PO4)3(OH) | |
| Fluorbritholite-(Ce) | (Ce,Ca)5(SiO4)3F | Hex. 6/m : P63/m |
| Fluorbritholite-(La) | Ca2La3(SiO4)3F | Hex. 6/m : P63/m |
| Fluorbritholite-(Nd) | Ca2Nd3(SiO4)3F | Hex. 6/m : P63/m |
| Fluorbritholite-(Y) | (Y,Ca)5(SiO4)3F | Hex. 6/m : P63/m |
| Tritomite-(Ce) | Ce5(SiO4,BO4)3(OH,O) | |
| Tritomite-(Y) | Y5(SiO4,BO4)3(O,OH,F) |
Common Associates
Associations Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 9.AH. | Fluorbritholite-(Nd) | Ca2Nd3(SiO4)3F |
| 9.AH.05 | Iimoriite-(Y) | Y2[SiO4][CO3] |
| 9.AH.10 | Tundrite-(Ce) | Na2Ce2Ti(SiO4)(CO3)2O2 |
| 9.AH.10 | Tundrite-(Nd) | Na2(Nd,Ce)2Ti(SiO4)(CO3)2O2 |
| 9.AH.15 | Galuskinite | Ca7(SiO4)3(CO3) |
| 9.AH.15 | Spurrite | Ca5(SiO4)2(CO3) |
| 9.AH.20 | Ternesite | Ca5(SiO4)2(SO4) |
| 9.AH.20 | Silicocarnotite | Ca5[(SiO4)(PO4)](PO4) |
| 9.AH.25 | Britholite-(Ce) | (Ce,Ca)5(SiO4)3OH |
| 9.AH.25 | Britholite-(Y) | (Y,Ca)5(SiO4)3OH |
| 9.AH.25 | Mattheddleite | Pb5(SiO4)1.5(SO4)1.5(Cl,OH) |
| 9.AH.25 | Fluorbritholite-(Ce) | (Ce,Ca)5(SiO4)3F |
| 9.AH.25 | Fluorellestadite | Ca5(SiO4)1.5(SO4)1.5F |
| 9.AH.25 | Fluorbritholite-(La) | Ca2La3(SiO4)3F |
| 9.AH.25 | Fluorbritholite-(Y) | (Y,Ca)5(SiO4)3F |
| 9.AH.25 | Hydroxylellestadite | Ca5(SiO4)1.5(SO4)1.5(OH) |
| 9.AH.25 | 'Calciobritholite' | (Ca,Y)5(SiO4,PO4)3(OH) |
| 9.AH.25 | 'Britholite-(La)' | Ca2(La,Ce,Ca)3(SiO4,PO4)3(OH,F) |
| 9.AH.25 | Tritomite-(Ce) | Ce5(SiO4,BO4)3(OH,O) |
| 9.AH.25 | Tritomite-(Y) | Y5(SiO4,BO4)3(O,OH,F) |
| 9.AH.25 | Chlorellestadite | Ca5(SiO4)1.5(SO4)1.5Cl |
| 9.AH.35 | Dargaite | BaCa12(SiO4)4(SO4)2O3 |
| 9.AH.35 | Nabimusaite | KCa12(SiO4)4(SO4)2O2F |
| 9.AH.40 | Stracherite | BaCa6(SiO4)2[(PO4)(CO3)]2F |
| 9.AH.40 | Zadovite | BaCa6[(SiO4)(PO4)](PO4)2F |
| 9.AH.40 | Gazeevite | BaCa6(SiO4)2(SO4)2O |
| 9.AH.45 | Flamite | Ca8-x(Na,K)x(SiO4)4-x(PO4)x |
| 9.AH.50 | Byzantievite | Ba5(Ca,REE,Y)22(Ti,Nb)18(SiO4)4[(PO4),(SiO4)]4(BO3)9O22[(OH),F]43(H2O)1.5 |
| 9.AH.55 | Greenwoodite | (Ba,V3+O)2V3+9(Fe3+,Fe2+)2Si2O22 |
| 9.AH.60 | Kihlmanite-(Ce) | Ce2TiO2(SiO4)(HCO3)2(H2O) |
| 9.AH.65 | Tsangpoite | Ca5(PO4)2(SiO4) |
| 9.AH.70 | 'Enalite' | (Th,REE,Al) [(PO4),(SiO4),(OH)] |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Fluorcalciobritholite
mindat.org URL:
https://www.mindat.org/min-29138.html
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Please feel free to link to this page.
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References for Fluorcalciobritholite
Reference List:
Pekov, Igor V., Pasero, Marco, Yaskovskaya, Asiya N., Chukanov, Nikita V., Pushcharovsky, Dmitry Y.u., 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 (1) 95-103 doi:10.1127/0935-1221/2007/0019-0095
Localities for Fluorcalciobritholite
Showing 11 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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).
All localities listed without proper references should be considered as questionable.
Canada | |
| Matte et al. (2025) |
China | |
| Yang et al. (2025) |
| Wang et al. (2023) |
Germany | |
| Schäfer et al. (2018) |
Japan | |
| Imaoka et al. (2024) |
Kyrgyzstan | |
| Pautov et al. (2013) |
Norway | |
| Selbekk et al. (2010) |
Russia (TL) | |
| Pekov et al. (2007) |
| Kasatkin (2019) |
| D. R. Zozulya et al. (2015) | |
Slovakia | |
| Uher et al. (2015) |
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In den Dellen quarries, Mendig, Mendig, Mayen-Koblenz, Rhineland-Palatinate, Germany