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Fluorbritholite-(Y)

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About Fluorbritholite-(Y)Hide

Formula:
(Y,Ca)5(SiO4)3F
Colour:
Light pinkish-brown to brownish-pink; light brown; dark brown
Lustre:
Vitreous, Resinous, Greasy
Hardness:
Specific Gravity:
4.609 (Calculated)
Crystal System:
Hexagonal
Name:
Named according to the nomenclature for the apatite supergroup (Pasero et al 2010). The name denotes its fluorine content, relationship to other britholite group minerals, and its yttrium content. The britholite root/group name is from the Greek βρῖθος (brithos) for weight, referring to the mineral's high specific gravity.
A mineral in the Britholite Group of the Apatite Supergroup. The fluorine-dominant analogue of britholite-(Y). It is isostructural with fluorapatite.


Classification of Fluorbritholite-(Y)Hide

Approved
Approval Year:
2009
First Published:
2011
9.AH.25

9 : SILICATES (Germanates)
A : Nesosilicates
H : Nesosilicates with CO3, SO4, PO4, etc.
52.4.12.8

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 Fluorbritholite-(Y)Hide

Vitreous, Resinous, Greasy
Transparency:
Transparent
Comment:
intermediate between typically vitreous and typically greasy, metamict samples show resinous lustre.
Colour:
Light pinkish-brown to brownish-pink; light brown; dark brown
Streak:
Pale brownish to almost white.
Hardness:
5½ on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven, Conchoidal
Density:
4.609 g/cm3 (Calculated)
Comment:
Not measured due to numerous micro-inclusions of fluorite and bastnäsite-(Ce).

Optical Data of Fluorbritholite-(Y)Hide

Type:
Uniaxial (+)
RI values:
nω = 1.784() nε = 1.789(3)
Max Birefringence:
δ = 0.005
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High

Chemical Properties of Fluorbritholite-(Y)Hide

Formula:
(Y,Ca)5(SiO4)3F

Crystallography of Fluorbritholite-(Y)Hide

Crystal System:
Hexagonal
Class (H-M):
6/m - Dipyramidal
Space Group:
P63/m
Setting:
P63/m
Cell Parameters:
a = 9.4437(2) Å, c = 6.8192(2) Å
Ratio:
a:c = 1 : 0.722
Unit Cell V:
526.68 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Irregular grains; hexagonal, tabular crystals; short-prismatic to thick-tabular crystals.
Forms: pinacoid {0001} and hexagonal prism {10-10} or {11-20}.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.104 (27)
3.160 (27)
3.102 (29)
2.826 (100)
2.775 (58)
2.737 (46)
1.948 (25)
1.839 (28)

Type Occurrence of Fluorbritholite-(Y)Hide

General Appearance of Type Material:
Lagmannsvik: As irregular grains and coarse, hexagonal, tabular crystals.
up to 1 mm embedded in granular aggregates of of creamcolored Y-rich fluorite “yttrofluorite”) and allanite-(Ce).
Place of Conservation of Type Material:
Fersman Mineralogical Museum, Moscow
Geological Setting of Type Material:
Alkaline-granite-related pegmatites (Lagmannsvik and Kråkmo); Amazonite-bearing pegmatite vein (Mt. Vyuntspakhk)
Associated Minerals at Type Locality:
Reference:
Pekov, I.V., Zubkova, N.V., Chukanov, N.V., Husdal, T.A., Zadov, A.E., Pushcharovsky, D.Yu. (2011) Fluorbritholite-(Y), (Y,Ca,Ln)5[(Si,P)O4]3 F, a new mineral of the britholite group. Neues Jahrbuch für Mineralogie - Abhandlungen: 188: 191-197.

Synonyms of Fluorbritholite-(Y)Hide

Relationship of Fluorbritholite-(Y) to other SpeciesHide

Other Members of this group:
Britholite-(Ce)(Ce,Ca)5(SiO4)3OHHex. 6/m : P63/m
Britholite-(La)Ca2(La,Ce,Ca)3(SiO4,PO4)3(OH,F)
Britholite-(Y)(Y,Ca)5(SiO4)3OHHex. 6/m : P63/m
Calciobritholite(Ca,Y)5(SiO4,PO4)3(OH)
Fluorbritholite-(Ce)(Ce,Ca)5(SiO4)3FHex. 6/m : P63/m
Fluorcalciobritholite(Ca,REE)5(SiO4,PO4)3FHex. 6/m : P63/m
Tritomite-(Ce)Ce5(SiO4,BO4)3(OH,O)
Tritomite-(Y)Y5(SiO4,BO4)3(O,OH,F)

Common AssociatesHide

Associated Minerals Based on Photo Data:
Bastnäsite-(Ce)3 photos of Fluorbritholite-(Y) associated with Bastnäsite-(Ce) on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.AH.05Iimoriite-(Y)Y2[SiO4][CO3]Tric.
9.AH.10Tundrite-(Ce)Na2Ce2Ti(SiO4)(CO3)2O2Tric. 1 : P1
9.AH.10Tundrite-(Nd)Na2(Nd,Ce)2Ti(SiO4)(CO3)2O2
9.AH.15SpurriteCa5(SiO4)2(CO3)Mon.
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.25FluorellestaditeCa5(SiO4)1.5(SO4)1.5FHex.
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.25Tritomite-(Ce)Ce5(SiO4,BO4)3(OH,O)
9.AH.25Tritomite-(Y)Y5(SiO4,BO4)3(O,OH,F)
9.AH.25Fluorcalciobritholite(Ca,REE)5(SiO4,PO4)3FHex. 6/m : P63/m

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

52.4.12.7Fluorcalciobritholite(Ca,REE)5(SiO4,PO4)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 Fluorbritholite-(Y)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Pasero, M., Kampf, A.R., Ferraris, C., Pekov, I.V., Rakovan, J.R., White, T.J. (2010) Nomenclature of the apatite supergroup minerals. European Journal of Mineralogy: 22: 163-179.
Pekov, I.V., Zubkova, N.V., Chukanov, N.V., Husdal, T.A., Zadov, A.E., Pushcharovsky, D.Yu. (2011) Fluorbritholite-(Y), (Y,Ca,Ln)5[(Si,P)O4]3 F, a new mineral of the britholite group. Neues Jahrbuch für Mineralogie - Abhandlungen: 188: 191-197.
Lyalina, L.M., Zozulya, D.R., Savchenko, Ye.E., Tarasov, M.P., Selivanova, E.A., Tarasova, E. (2014) Fluorbritholite-(Y) and yttrialite-(Y) from silexites of the Keivy alkali granites, Kola Peninsula. Geology of ore deposit: 56: 589-602.

Internet Links for Fluorbritholite-(Y)Hide

Localities for Fluorbritholite-(Y)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.
Norway (TL)
 
  • Nordland
    • Hamarøy
Pekov, I.V., Zubkova, N.V., Chukanov, N.V., Husdal, T.A., Zadov, A.E., Pushcharovsky, D.Yu. (2011): Fluorbritholite-(Y), (Y,Ca,Ln)5[(Si,P)O4]3 F, a new mineral of the britholite group. Neues Jahrbuch für Mineralogie - Abhandlungen, 188, 191-197
Pekov, I.V., Zubkova, N.V., Chukanov, N.V., Husdal, T.A., Zadov, A.E., Pushcharovsky, D.Yu. (2011): Fluorbritholite-(Y), (Y,Ca,Ln)5[(Si,P)O4]3 F, a new mineral of the britholite group. Neues Jahrbuch für Mineralogie - Abhandlungen, 188, 191-197
  • Vest-Agder
    • Vennesla
      • Øvrebø
Griffin, W.L., Nilssen, B. & Jensen, B.B. (1979): Britholite-(Y) and its alteration: Reiarsdal, Vest-Agder, south Norway. Norsk Geologisk Tidsskrift 59: 265-271; Pasero, M., Kampf, A. R., Ferraris, C., Pekov, I. V., Rakovan, J. and White, T. J. (2010): Nomenclature of the apatite supergroup minerals. European Journal of Mineralogy 22, 163-179.
Russia (TL)
 
  • Northern Region
    • Murmanskaya Oblast'
      • Keivy Mountains
        • Western Keivy Massif
Pekov, I.V., Zubkova, N.V., Chukanov, N.V., Husdal, T.A., Zadov, A.E., Pushcharovsky, D.Yu. (2011): Fluorbritholite-(Y), (Y,Ca,Ln)5[(Si,P)O4]3 F, a new mineral of the britholite group. Neues Jahrbuch für Mineralogie - Abhandlungen, 188, 191-197
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.
Slovakia
 
  • Trenčín Region
    • Považská Bystrica Co.
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.
Sweden
 
  • Västmanland
    • Norberg
      • Röberg ore field
Holtstam, D., Andersson, U.B. (2007): The REE minerals of the Bastnäs-type deposits, South-Central Sweden. Canadian Mineralogist. 45, 1073-1114
Mineral and/or Locality  
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