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ThorbastnÀsite

A valid IMA mineral species
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06432770017272041608689.jpg
ThorbastnÀsite

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
07411110017271927051217.jpg
ThorbastnÀsite, etc.

Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
00679490017726683121533.jpg
ThorbastnÀsite

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
09093890017272016808537.jpg
ThorbastnÀsite

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
07411110017271927051217.jpg
ThorbastnÀsite, etc.

Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
00679490017726683121533.jpg
ThorbastnÀsite

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
09093890017272016808537.jpg
ThorbastnÀsite

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
07411110017271927051217.jpg
ThorbastnÀsite, etc.

Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
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About ThorbastnÀsiteHide

Formula:
ThCa(CO3)2F2 · 3H2O
May contain minor REE.
Colour:
Brown
Hardness:
4 - 4½
Crystal System:
Hexagonal
Name:
The name reflects its thorium content and similarity to bastnÀsite.
This page provides mineralogical data about ThorbastnÀsite.


Name EncodingHide

ASCII-7:
Thorbastnasite

Unique IdentifiersHide

Mindat ID:
3942
Long-form identifier:
mindat:1:1:3942:6

IMA Classification of ThorbastnÀsiteHide

IMA status:
Approved
IMA Formula:
Th4+Ca(CO3)2F2·3H2O

Classification of ThorbastnÀsiteHide

Strunz-mindat (2026):
5.BD.20a

5 : CARBONATES (NITRATES)
B : Carbonates with additional anions, without H2O
D : With rare earth elements (REE)
Dana 8th ed.:
16b.1.2.1

16b : HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
1 : AmBn(XO3)pZqxH2O & with (m+n):p = 1:1
Hey's CIM Ref.:
12.1.22

12 : Carbonates with other anions
1 : Carbonates with halides

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference for Standard
TbsnIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of ThorbastnÀsiteHide

Colour:
Brown
Hardness:
4 - 4½ on Mohs scale

Optical Data of ThorbastnÀsiteHide

Type:
Uniaxial

Chemistry of ThorbastnÀsiteHide

Mindat Formula:
ThCa(CO3)2F2 · 3H2O

May contain minor REE.
Element Weights:
Element% weight
Th47.924 %
O29.740 %
Ca8.278 %
F7.848 %
C4.961 %
H1.249 %

Calculated from ideal end-member formula.
Th
O
Ca
F
C
H
Elements listed:
C, Ca, F, H, O, Th - search for minerals with similar chemistry

Crystallography of ThorbastnÀsiteHide

Crystal System:
Hexagonal
Class (H-M):
6m2 - Ditrigonal Dipyramidal
Space Group:
P62c
Cell Parameters:
a = 6.99(2) Å, c = 9.71(2) Å
Ratio:
a:c = 1 : 1.389
Unit Cell V:
410.87 ų (Calculated from Unit Cell)
Z:
3
Morphology:
typically as cryptocrystalline masses
Comment:
crystallography added from thorbastnÀsite entry in "Handbook of Mineralogy"

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 4b: Highly evolved igneous rocks>3.0
35 : Ultra-alkali and agpaitic igneous rocks

Type Occurrence of ThorbastnÀsiteHide

Synonyms of ThorbastnÀsiteHide

Other Language Names for ThorbastnÀsiteHide

Relationship of ThorbastnÀsite to other SpeciesHide

Member of:
BastnÀsite Group
Other Members of BastnÀsite Group:
BastnÀsite(Ce/Nd/Y/REE)(CO3)F
HydroxylbastnÀsite-(Ce)Ce(CO3)(OH)Hex. 6 : P6
HydroxylbastnÀsite-(La)(La,Nd,Ce)(CO3)(OH,F)Hex. 6 : P6
HydroxylbastnÀsite-(Nd)Nd(CO3)(OH)Hex. 6m2 : P62c

Common AssociatesHide

Associations Based on Photo Data:
6 photos of ThorbastnÀsite associated with AlbiteNa(AlSi3O8)
6 photos of ThorbastnĂ€site associated with Nenadkevichite(Na,◻)8Nb4(Si4O12)2(O,OH)4 · 8H2O
2 photos of ThorbastnÀsite associated with AegirineNaFe3+Si2O6
1 photo of ThorbastnÀsite associated with Mckelveyite GroupA3B3(CO3)6 · 3H2O
1 photo of ThorbastnÀsite associated with AnalcimeNa(AlSi2O6) · H2O
1 photo of ThorbastnÀsite associated with SabinaiteNa4Zr2TiO4(CO3)4
1 photo of ThorbastnÀsite associated with Alicewilsonite-(YCe)Na2Sr2YCe(CO3)6 · 3H2O
1 photo of ThorbastnÀsite associated with Bainbridgeite-(YCe)Na2Ba2YCe(CO3)6 · 3H2O
1 photo of ThorbastnÀsite associated with PyriteFeS2
1 photo of ThorbastnÀsite associated with QuartzSiO2

Related Minerals - Strunz-mindat GroupingHide

5.BD.Cordylite-(La)(Na,Ca)Ba(La,Ce,Sr)2(CO3)4F Hex. 6/mmm(6/m2/m2/m) : P63/mmc
5.BD.05Cordylite-(Ce)NaBaCe2(CO3)4FHex. 6/mmm(6/m2/m2/m) : P63/mmc
5.BD.05'Unnamed (Cordylite-like Calcium-Barium-Cerium Carbonate-Fluoride)'Ca◻Ba2Ce4[CO3]8F2
5.BD.05Lukechangite-(Ce)Na3Ce2(CO3)4FHex. 6mm : P63mc
5.BD.10'Zhonghuacerite-(Ce)'Ba2Ce(CO3)3FTrig.
5.BD.10Kukharenkoite-(Ce)Ba2Ce(CO3)3FMon. 2/m : P21/m
5.BD.10Kukharenkoite-(La)Ba2(La,Ce,Th)(CO3)3FMon. 2/m : P21/m
5.BD.15Cebaite-(Ce)Ba3Ce2(CO3)5F2Mon. 2/m : B2/m
5.BD.15'Cebaite-(Nd)'Ba3(Nd,Ce)2(CO3)5F2Mon.
5.BD.18Arisite-(Ce)NaCe2(CO3)2[F2x(CO3)1-x]FHex. 6m2 : P6m2
5.BD.18Arisite-(La)NaLa2(CO3)2[F2x(CO3)1-x]FHex. 6m2 : P6m2
5.BD.20cSynchysite-(Ce)CaCe(CO3)2FMon. 2/m : B2/b
5.BD.20cSynchysite-(Nd)CaNd(CO3)2FOrth.
5.BD.20cSynchysite-(Y)CaY(CO3)2FMon. 2/m : B2/b
5.BD.20aBastnÀsite-(Ce)Ce(CO3)FHex. 6m2 : P6c2
5.BD.20bParisite-(Ce)CaCe2(CO3)3F2Mon. m : Bb
5.BD.20aBastnÀsite-(La)La(CO3)FHex. 6m2 : P62c
5.BD.20bParisite-(Nd)Ca(Nd,Ce,La)2(CO3)3F2Mon. m : Bb
5.BD.20aBastnÀsite-(Y)Y(CO3)FHex. 6m2 : P62c
5.BD.20bParisite-(La)CaLa2(CO3)3F2Mon.
5.BD.20dRöntgenite-(Ce)Ca2(Ce,La)3(CO3)5F3Trig. 3 : R3
5.BD.20aHydroxylbastnÀsite-(Ce)Ce(CO3)(OH)Hex. 6 : P6
5.BD.20aHydroxylbastnÀsite-(Nd)Nd(CO3)(OH)Hex. 6m2 : P62c
5.BD.20c'Hydroxylsynchysite-(Ce)'Ca(Ce,La)(CO3)2(OH)
5.BD.20c'Synchysite-(La)'Ca(La,Nd)(CO3)2F
5.BD.20aBastnÀsite-(Nd)Nd(CO3)F Hex. 6m2 : P62c
5.BD.20aHydroxylbastnÀsite-(La)(La,Nd,Ce)(CO3)(OH,F)Hex. 6 : P6
5.BD.25Qaqarssukite-(Ce)Ba(Ce,REE)(CO3)2FTrig. 3 : P3
5.BD.25HorvĂĄthite-(Y)NaY(CO3)F2Orth. mmm(2/m2/m2/m) : Pmmn
5.BD.35Huanghoite-(Ce)BaCe(CO3)2FTrig. 3m(32/m) : R3m
5.BD.35Huanghoite-(Nd) BaNd(CO3)2FTrig. 3m : R3m
5.BD.45Bayanoboite-(Y)Ba2Y(CO3)2F3Orth. mmm(2/m2/m2/m) : Pbcn

RadioactivityHide

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.

Internet Links for ThorbastnÀsiteHide

References for ThorbastnÀsiteHide

Localities for ThorbastnÀsiteHide

Showing 21 localities.

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.
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Locality ListHide

- 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). 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Argentina
 
  • San Luis Province
    • San MartĂ­n Department
      • Las Chacras
- (n.d.)
Lira et al. (Ed. E.O. Zappettini)
Bolivia
 
  • Cochabamba
    • Ayopaya Province
Schultz et al. (2004)
Schultz et al. (2004)
Brazil
 
  • Minas Gerais
    • Poços de Caldas
Baretto & Fujimori (1986) +1 other reference
Gomes et al. (2023)
Canada
 
  • QuĂ©bec
    • MontĂ©rĂ©gie
      • La VallĂ©e-du-Richelieu RCM
        • Mont Saint-Hilaire
HorvĂĄth et al. (2000) +1 other reference
    • MontrĂ©al
176-178. +2 other references
China
 
  • Inner Mongolia
    • Baotou City
      • Bayan Obo mining district
Zhu et al. (2024)
Czech Republic
 
  • Central Bohemian Region
    • KutnĂĄ Hora District
GOLIÁƠ (2002)
France
 
  • Auvergne-RhĂŽne-Alpes
    • Loire
      • Saint-Étienne
        • Saint-Julien-Molin-Molette
Melle et al. (2017)
Italy
 
  • Sardinia
    • Metropolitan City of Cagliari
      • Sarroch
Orlandi et al. (2015)
  • Tuscany
    • Massa-Carrara Province
      • Massa
Orlandi (2011)
Norway
 
  • Nordland
    • HamarĂžy
      • Drag
Husdal (2023)
Russia
 
  • Chukotka Autonomous Okrug
    • Iultinsky District
Alekseev et al. (2015)
  • Khabarovsk Krai
    • Verkhnebureinsky District
Alekseev et al. (2015)
  • Tuva
    • Sangilen Upland
      • Balygtyg-Khem River
Pekov (1998)
USA
 
  • Illinois
    • Hardin County
      • Hicks
McIntosh et al. (2026)
McIntosh et al. (2026)
  • New Mexico
    • Colfax County
      • Springer
        • Point of Rocks Mesa
Rocks & Min.:60:229.
  • Wisconsin
    • Marathon County
      • Wausau Intrusive Complex
        • Stettin pluton
Buchholz et al. (2017)
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