Thorbastnäsite
A valid IMA mineral species
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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.
Unique Identifiers
Mindat ID:
3942
Long-form identifier:
mindat:1:1:3942:6
GUID
(UUID V4):
(UUID V4):
1466ca62-3757-49d9-ae69-e5239ca00bc2
IMA Classification of Thorbastnäsite
Approved
Classification of Thorbastnäsite
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
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 |
|---|---|---|
| Tbsn | 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 Thorbastnäsite
Colour:
Brown
Hardness:
4 - 4½ on Mohs scale
Optical Data of Thorbastnäsite
Type:
Uniaxial
Chemistry of Thorbastnäsite
Mindat 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"
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 |
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/Nd/Y/REE)(CO3)F | |
| Hydroxylbastnäsite-(Ce) | Ce(CO3)(OH) | Hex. 6 : P6 |
| Hydroxylbastnäsite-(La) | (La,Nd,Ce)(CO3)(OH,F) | Hex. 6 : P6 |
| Hydroxylbastnäsite-(Nd) | Nd(CO3)(OH) | Hex. 6 m2 : P62c |
Common Associates
Associated Minerals Based on Photo Data:
| 5 photos of Thorbastnäsite associated with Albite | Na(AlSi3O8) |
| 3 photos of Thorbastnäsite associated with Nenadkevichite | (Na,◻)8Nb4(Si4O12)2(O,OH)4 · 8H2O |
| 1 photo of Thorbastnäsite associated with Pyrite | FeS2 |
| 1 photo of Thorbastnäsite associated with Quartz | SiO2 |
| 1 photo of Thorbastnäsite associated with Röntgenite-(Ce) | Ca2(Ce,La)3(CO3)5F3 |
| 1 photo of Thorbastnäsite associated with Donnayite Group | |
| 1 photo of Thorbastnäsite associated with Analcime | Na(AlSi2O6) · H2O |
| 1 photo of Thorbastnäsite associated with Sabinaite | Na4Zr2TiO4(CO3)4 |
| 1 photo of Thorbastnäsite associated with Alicewilsonite-(YCe) | Na2Sr2YCe(CO3)6 · 3H2O |
| 1 photo of Thorbastnäsite associated with Bainbridgeite-(YCe) | Na2Ba2YCe(CO3)6 · 3H2O |
Related Minerals - Strunz-mindat Grouping
| 5.BD. | Cordylite-(La) | (Na,Ca)Ba(La,Ce,Sr)2(CO3)4F |
| 5.BD.05 | Cordylite-(Ce) | NaBaCe2(CO3)4F |
| 5.BD.05 | Lukechangite-(Ce) | Na3Ce2(CO3)4F |
| 5.BD.05 | Unnamed (Cordylite-like (Ca0.5[]0.5)BaCe2[CO3]4F) | Ca◻Ba2Ce4[CO3]8F2 |
| 5.BD.10 | Zhonghuacerite-(Ce) | Ba2Ce(CO3)3F |
| 5.BD.10 | Kukharenkoite-(Ce) | Ba2Ce(CO3)3F |
| 5.BD.10 | Kukharenkoite-(La) | Ba2(La,Ce,Th)(CO3)3F |
| 5.BD.15 | Cebaite-(Ce) | Ba3Ce2(CO3)5F2 |
| 5.BD.15 | Cebaite-(Nd) | Ba3(Nd,Ce)2(CO3)5F2 |
| 5.BD.18 | Arisite-(Ce) | NaCe2(CO3)2[F2x(CO3)1-x]F |
| 5.BD.18 | Arisite-(La) | NaLa2(CO3)2[F2x(CO3)1-x]F |
| 5.BD.20a | Bastnäsite-(Ce) | Ce(CO3)F |
| 5.BD.20a | Bastnäsite-(La) | La(CO3)F |
| 5.BD.20a | Bastnäsite-(Y) | Y(CO3)F |
| 5.BD.20a | Hydroxylbastnäsite-(Ce) | Ce(CO3)(OH) |
| 5.BD.20a | Hydroxylbastnäsite-(Nd) | Nd(CO3)(OH) |
| 5.BD.20a | Hydroxylbastnäsite-(La) | (La,Nd,Ce)(CO3)(OH,F) |
| 5.BD.20b | Parisite-(Ce) | CaCe2(CO3)3F2 |
| 5.BD.20b | Parisite-(Nd) | Ca(Nd,Ce,La)2(CO3)3F2 |
| 5.BD.20d | Röntgenite-(Ce) | Ca2(Ce,La)3(CO3)5F3 |
| 5.BD.20c | Synchysite-(Ce) | CaCe(CO3)2F |
| 5.BD.20c | Synchysite-(Nd) | CaNd(CO3)2F |
| 5.BD.20c | Synchysite-(Y) | CaY(CO3)2F |
| 5.BD.20a | Bastnäsite-(Nd) | Nd(CO3)F |
| 5.BD.20c | Hydroxylsynchysite-(Ce) | Ca(Ce,La)(CO3)2(OH) |
| 5.BD.20c | Synchysite-(La) | Ca(La,Nd)(CO3)2F |
| 5.BD.20b | Parisite-(La) | CaLa2(CO3)3F2 |
| 5.BD.25 | Horváthite-(Y) | NaY(CO3)F2 |
| 5.BD.25 | Qaqarssukite-(Ce) | Ba(Ce,REE)(CO3)2F |
| 5.BD.35 | Huanghoite-(Ce) | BaCe(CO3)2F |
| 5.BD.45 | Bayanoboite-(Y) | Ba2Y(CO3)2F3 |
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 Thorbastnäsite
mindat.org URL:
https://www.mindat.org/min-3942.html
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References for Thorbastnäsite
Localities for Thorbastnäsite
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.
Argentina | |
| Urbina Nilda |
| Lira et al. (Ed. E.O. Zappettini) | |
Bolivia | |
| Schultz et al. (2004) |
| Schultz et al. (2004) | |
Brazil | |
| Baretto & Fujimori (1986) |
Canada | |
| HORVÁTH et al. (2000) +1 other reference |
| 176-178. +2 other references |
China | |
| Zhu et al. (2024) |
Czech Republic | |
| GOLIÁŠ (2002) |
France | |
| Melle A. (2017) |
Italy | |
| Orlandi et al. (2015) |
| Orlandi (2011) |
Norway | |
| Husdal (2023) |
Russia | |
| Alekseev et al. (2015) |
| Alekseev et al. (2015) |
| Pekov (1998) |
USA | |
| Rocks & Min.:60:229. |
| Buchholz et al. (2017) |
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Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada