Thorbastnäsite
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About Thorbastnäsite
Formula:
ThCa(CO3)2F2 · 3H2O
May contain minor REE.
Colour:
Brown
Hardness:
4 - 4½
Crystal System:
Hexagonal
Member of:
Name:
The name reflects its thorium content and similarity to bastnäsite.
This page provides mineralogical data about Thorbastnäsite.
Classification of Thorbastnäsite
Approved
5/E.10-10
5.BD.20a
5 : CARBONATES (NITRATES)
B : Carbonates with additional anions, without H2O
D : With rare earth elements (REE)
5 : CARBONATES (NITRATES)
B : Carbonates with additional anions, without H2O
D : With rare earth elements (REE)
16b.1.2.1
16b : HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
1 : AmBn(XO3)pZqxH2O & with (m+n):p = 1:1
16b : HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
1 : AmBn(XO3)pZq
12.1.22
12 : Carbonates with other anions
1 : Carbonates with halides
12 : Carbonates with other anions
1 : Carbonates with halides
Physical Properties of Thorbastnäsite
Colour:
Brown
Hardness:
4 - 4½ on Mohs scale
Optical Data of Thorbastnäsite
Type:
Uniaxial
Chemical Properties of Thorbastnäsite
Formula:
ThCa(CO3)2F2 · 3H2O
May contain minor REE.
May contain minor REE.
Crystallography of Thorbastnäsite
Crystal System:
Hexagonal
Class (H-M):
6 m2 - 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 thorbastnäsite entry in "Handbook of Mineralogy"
Type Occurrence of Thorbastnäsite
Synonyms of Thorbastnäsite
Other Language Names for Thorbastnäsite
Relationship of Thorbastnäsite to other Species
Member of:
Other Members of this group:
Bastnäsite-(Ce) | Ce(CO3)F | Hex. 6 m2 : P6c2 |
Bastnäsite-(La) | La(CO3)F | Hex. |
Bastnäsite-(Nd) | Nd(CO3)F | Hex. 6 m2 : P62c |
Bastnäsite-(Y) | Y(CO3)F | Hex. 6 m2 : P62c |
Hydroxylbastnäsite-(Ce) | Ce(CO3)(OH) | Hex. 6 : P6 |
Hydroxylbastnäsite-(La) | (La,Nd,Ce)(CO3)(OH,F) | Hex. |
Hydroxylbastnäsite-(Nd) | Nd(CO3)(OH) | Hex. |
Common Associates
Associated Minerals Based on Photo Data:
1 photo of Thorbastnäsite associated with Röntgenite-(Ce) | Ca2(Ce,La)3(CO3)5F3 |
1 photo of Thorbastnäsite associated with Albite | Na(AlSi3O8) |
1 photo of Thorbastnäsite associated with Donnayite Group |
Related Minerals - Nickel-Strunz Grouping
5.BD.05 | Cordylite-(Ce) | NaBaCe2(CO3)4F | Hex. |
5.BD.05 | Lukechangite-(Ce) | Na3Ce2(CO3)4F | Hex. 6mm : P63mc |
5.BD.10 | Zhonghuacerite-(Ce) | Ba2Ce(CO3)3F | Trig. |
5.BD.10 | Kukharenkoite-(Ce) | Ba2Ce(CO3)3F | Mon. 2/m : P21/m |
5.BD.10 | Kukharenkoite-(La) | Ba2(La,Ce,Th)(CO3)3F | Mon. 2/m : P21/m |
5.BD.15 | Cebaite-(Ce) | Ba3Ce2(CO3)5F2 | Mon. 2/m : B2/m |
5.BD.15 | Cebaite-(Nd) | Ba3(Nd,Ce)2(CO3)5F2 | Mon. |
5.BD.18 | Arisite-(Ce) | NaCe2(CO3)2[F2x(CO3)1-x]F | Hex. 6 m2 : P6m2 |
5.BD.18 | Arisite-(La) | NaLa2(CO3)2[F2x(CO3)1-x]F | Hex. 6 m2 : P6m2 |
5.BD.20a | Bastnäsite-(Ce) | Ce(CO3)F | Hex. 6 m2 : P6c2 |
5.BD.20a | Bastnäsite-(La) | La(CO3)F | Hex. |
5.BD.20a | Bastnäsite-(Y) | Y(CO3)F | Hex. 6 m2 : P62c |
5.BD.20a | Hydroxylbastnäsite-(Ce) | Ce(CO3)(OH) | Hex. 6 : P6 |
5.BD.20a | Hydroxylbastnäsite-(Nd) | Nd(CO3)(OH) | Hex. |
5.BD.20a | Hydroxylbastnäsite-(La) | (La,Nd,Ce)(CO3)(OH,F) | Hex. |
5.BD.20b | Parisite-(Ce) | CaCe2(CO3)3F2 | Mon. m : Bb |
5.BD.20b | Parisite-(Nd) | Ca(Nd,Ce,La)2(CO3)3F2 | |
5.BD.20d | Röntgenite-(Ce) | Ca2(Ce,La)3(CO3)5F3 | Trig. 3 : R3 |
5.BD.20c | Synchysite-(Ce) | CaCe(CO3)2F | Mon. 2/m : B2/b |
5.BD.20c | Synchysite-(Nd) | CaNd(CO3)2F | Orth. |
5.BD.20c | Synchysite-(Y) | CaY(CO3)2F | Mon. 2/m : B2/b |
5.BD.20a | Bastnäsite-(Nd) | Nd(CO3)F | Hex. 6 m2 : P62c |
5.BD.25 | Horváthite-(Y) | NaY(CO3)F2 | Orth. mmm (2/m 2/m 2/m) : Pmmn |
5.BD.25 | Qaqarssukite-(Ce) | Ba(Ce,REE)(CO3)2F | Trig. 3 : P3 |
5.BD.35 | Huanghoite-(Ce) | BaCe(CO3)2F | Trig. 3m (3 2/m) : R3m |
Related Minerals - Hey's Chemical Index of Minerals Grouping
12.1.1 | Northupite | Na3Mg(CO3)2Cl | Iso. m3 (2/m 3) : Fd3 |
12.1.2 | Barentsite | Na7Al(HCO3)2(CO3)2F4 | Tric. |
12.1.3 | Rouvilleite | Na3(Ca,Mn,Fe)2(CO3)3F | Mon. 2/m : B2/b |
12.1.4 | Chlormagaluminite | Mg4Al2(OH)12Cl2 · 3H2O | Hex. 6/mmm (6/m 2/m 2/m) : P63/mcm |
12.1.5 | Defernite | Ca6(CO3)2-x(SiO4)x(OH)7(Cl,OH)1-2x (x | Orth. mmm (2/m 2/m 2/m) : Pnma |
12.1.6 | Brenkite | Ca2(CO3)F2 | Orth. |
12.1.7 | Stenonite | (Sr,Ba,Na)2Al(CO3)F5 | Mon. 2/m |
12.1.8 | Bastnäsite-(Ce) | Ce(CO3)F | Hex. 6 m2 : P6c2 |
12.1.9 | Bastnäsite-(La) | La(CO3)F | Hex. |
12.1.10 | Bastnäsite-(Y) | Y(CO3)F | Hex. 6 m2 : P62c |
12.1.11 | Parisite-(Ce) | CaCe2(CO3)3F2 | Mon. m : Bb |
12.1.12 | Parisite-(Nd) | Ca(Nd,Ce,La)2(CO3)3F2 | |
12.1.13 | Synchysite-(Ce) | CaCe(CO3)2F | Mon. 2/m : B2/b |
12.1.14 | Synchysite-(Y) | CaY(CO3)2F | Mon. 2/m : B2/b |
12.1.15 | Synchysite-(Nd) | CaNd(CO3)2F | Orth. |
12.1.16 | Röntgenite-(Ce) | Ca2(Ce,La)3(CO3)5F3 | Trig. 3 : R3 |
12.1.17 | Cordylite-(Ce) | NaBaCe2(CO3)4F | Hex. |
12.1.19 | Huanghoite-(Ce) | BaCe(CO3)2F | Trig. 3m (3 2/m) : R3m |
12.1.20 | Zhonghuacerite-(Ce) | Ba2Ce(CO3)3F | Trig. |
12.1.21 | Cebaite-(Ce) | Ba3Ce2(CO3)5F2 | Mon. 2/m : B2/m |
12.1.23 | Phosgenite | Pb2CO3Cl2 | Tet. 4/mmm (4/m 2/m 2/m) : P4/mbm |
12.1.24 | Barstowite | Pb4Cl6(CO3) · H2O | Mon. 2/m : P21/m |
12.1.25 | Albrechtschraufite | Ca4Mg(UO2)2(CO3)6F2 · 17-18H2O | Tric. 1 : P1 |
12.1.26 | Kettnerite | CaBiCO3OF | Orth. mmm (2/m 2/m 2/m) |
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.
References for Thorbastnäsite
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva (1965): 94(1): 105-113.
American Mineralogist (1965): 50: 1505.
Internet Links for Thorbastnäsite
mindat.org URL:
https://www.mindat.org/min-3942.html
Please feel free to link to this page.
Please feel free to link to this page.
External Links:
Mineral Dealers:
Localities for Thorbastnäsite
Locality List




All localities listed without proper references should be considered as questionable.
Argentina | |
| Urbina Nilda, E., et al. "METALLOGENY OF THE SIERRAS PAMPEANAS OF SAN LUIS, ARGENTINA." |
Lira, R., Viñas, N.A., Ripley, E.M. y Barbieri, M., 1999. El yacimiento de tierras raras, torio y uranio Rodeo de Los Molles, San Luis. En: Recursos Minerales de la República Argentina (Ed. E.O. Zappettini). Instituto de Geología y Recursos Minerales. SEGEMAR, Anales 35: 987-997. | |
Bolivia | |
| Schultz, F., et al. (2004) Contrib. Mineral. Petrol., 148, 391-408 |
Schultz, F., et al. (2004) Contrib. Mineral. Petrol., 148, 391-408. | |
Brazil | |
| Baretto & Fujimori (1986) |
Canada | |
| HORVÁTH, L. and HORVÁTH-PFENNINGER, E. (2000) Die Mineralien des Mont Saint-Hilaire. Lapis, 25, Nr. 7/8, 23-61 (in German).; HORVÁTH, L., PFENNINGER‑HORVÁTH, E. (2000) I minerali di Mont-Saint-Hilaire (Québec, Canada) Rivista Mineralogica Italiana, XXIV, 140-202 (in Italian with English summary). |
| GRICE, J.D. (1989) A Mineral Locality in Montreal City. In: Famous Mineral Localities of Canada. Published by Fitzhenry & Whiteside Limited & the National Museum of Natural Sciences, 190 pages: 109-114; 176-178.; TARASSOFF, P., HORVÁTH, L., PFENNINGER-HORVÁTH, E. (2006) Famous mineral localities: the Francon quarry, Montréal, Québec. The Mineralogical Record, 37, 5-60. |
Czech Republic | |
| GOLIÁŠ, V. (2002): Thoriová mineralizace Českého Masívu. – MS, dokt. práce, PřF UK Praha. |
France | |
| Melle A., Meisser N. (2017) : Première occurrence française de thorbastnäsite. Le cahier des micromonteurs N° 138, p20 |
Italy | |
| Orlandi P., Gelosa M., Bonacina E., Caboni F., Mamberti M., Tanca G.A., Vinci A. (2015): Sette nuove specie mineralogiche della Sardegna. I minerali della mineralizzazione a molibdeno e bismuto di Su Seinargiu (CA). Riv. Mineral. Ital., 39, 2, 84-115. |
| Orlandi, P. (2011): Zibaldone di mineralogia italiana 2010. Micro, 1/2011, 39-42 |
Russia | |
| Alekseev, V. I., & Marin, Y. B. (2015). Composition and evolution of accessory mineralization of Li–F granites in the Far East as indicators of their ore potential. Geology of Ore Deposits, 57(8), 635-644. |
| Alekseev, V. I., & Marin, Y. B. (2015). Composition and evolution of accessory mineralization of Li–F granites in the Far East as indicators of their ore potential. Geology of Ore Deposits, 57(8), 635-644. |
| Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow |
USA | |
| Rocks & Min.:60:229. |
Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada