Bastnäsite-(Y)
A valid IMA mineral species
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About Bastnäsite-(Y)
Formula:
Y(CO3)F
Colour:
Translucent brick-red
Hardness:
4 - 4½
Crystal System:
Hexagonal
Member of:
Name:
For the locality at the Bastnäs mines, Riddarhyttan, Skinnskatteberg, Västmanland, Sweden, plus the "-(Y)" suffix due to the dominance of yttrium in the composition.
Name Encoding
ASCII-7:
Bastnasite-(Y)
Unique Identifiers
Mindat ID:
562
Long-form identifier:
mindat:1:1:562:1
Similar Names
| Bastnäsite | A group of related mineral species | (Ce/Nd/Y/REE)(CO3)F |
| Bastnäsite-(Ce) | A valid IMA mineral species - grandfathered | Ce(CO3)F |
| Bastnäsite-(Ce)-Hydroxylbastnäsite-(Ce) Series | A solid-solution series between two end-member minerals | |
| Bastnäsite-(La) | A valid IMA mineral species | La(CO3)F |
| Bastnäsite-(Nd) | A valid IMA mineral species | Nd(CO3)F |
IMA Classification of Bastnäsite-(Y)
Classification of Bastnäsite-(Y)
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)
16a.1.1.3
16a : ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
1 : (AB)(XO3)Zq
16a : ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
1 : (AB)(XO3)Zq
12.1.10
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.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Bsn-Y | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Bsn | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of Bastnäsite-(Y)
Optical Data of Bastnäsite-(Y)
Type:
Uniaxial (+)
RI values:
nω = 1.717 nε = 1.818
Max. Birefringence:
δ = 0.101
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. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
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. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Moderate
Chemistry of Bastnäsite-(Y)
Mindat Formula:
Y(CO3)F
Element Weights:
Elements listed:
Crystallography of Bastnäsite-(Y)
Crystal System:
Hexagonal
Class (H-M):
6m2 - Ditrigonal Dipyramidal
Space Group:
P62c
Cell Parameters:
a = 6.57(2) Å, c = 9.48(2) Å
Ratio:
a:c = 1 : 1.443
Unit Cell V:
354.38 ų (Calculated from Unit Cell)
Z:
6
Morphology:
Irregular tiny (to 4 micron) grains forming compact pseudomorphs after gagarinite-(Y).
Comment:
Space group by analogy to bastnäsite-(Ce).
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.43 Å | (75) |
| 2.78 Å | (100) |
| 1.976 Å | (75) |
| 1.948 Å | (100) |
| 1.822 Å | (75) |
| 1.608 Å | (40) |
| 1.260 Å | (50) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 34 : Complex granite pegmatites | |
| 35 : Ultra-alkali and agpaitic igneous rocks |
Type Occurrence of Bastnäsite-(Y)
Place of Conservation of Type Material:
Institute of Mineralogy, Geochemistry and Crystal Chemistry of Rare Elements, Moscow.
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, number vis1961 and vis1962.
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, number vis1961 and vis1962.
Geological Setting of Type Material:
Secondary mineral in a microcline–quartz pegmatite vein.
Associated Minerals at Type Locality:
Synonyms of Bastnäsite-(Y)
Other Language Names for Bastnäsite-(Y)
Dutch:Bastnäsiet-(Y)
German:Bastnäsit-(Y)
Russian:Бастнезит-(Y)
Simplified Chinese:氟碳钇矿
Traditional Chinese:氟碳釔礦
Relationship of Bastnäsite-(Y) to other Species
Member of:
Other Members of Bastnäsite:
| Bastnäsite-(Ce) | Ce(CO3)F | Hex. 6m2 : P6c2 |
| Bastnäsite-(La) | La(CO3)F | Hex. 6m2 : P62c |
| Bastnäsite-(Nd) | Nd(CO3)F | Hex. 6m2 : P62c |
Common Associates
Associations Based on Photo Data:
| 9 photos of Bastnäsite-(Y) associated with Quartz | SiO2 |
| 9 photos of Bastnäsite-(Y) associated with Gagarinite-(Y) | NaCaYF6 |
| 2 photos of Bastnäsite-(Y) associated with Hydroxylbastnäsite-(Nd) | Nd(CO3)(OH) |
| 2 photos of Bastnäsite-(Y) associated with Calcybeborosilite-(Y) | (Y,Ca)2(◻,Fe2+)(B,Be)2[SiO4]2(OH,O)2 |
| 1 photo of Bastnäsite-(Y) associated with Tengerite-(Y) | Y2(CO3)3 · 2-3H2O |
| 1 photo of Bastnäsite-(Y) associated with Pyrite | FeS2 |
| 1 photo of Bastnäsite-(Y) associated with Gasparite-(Ce) | Ce(AsO4) |
| 1 photo of Bastnäsite-(Y) associated with Chernovite-(Y) | Y(AsO4) |
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 | 'Unnamed (Cordylite-like Calcium-Barium-Cerium Carbonate-Fluoride)' | Ca◻Ba2Ce4[CO3]8F2 |
| 5.BD.05 | Lukechangite-(Ce) | Na3Ce2(CO3)4F |
| 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.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-(Ce) | Ce(CO3)F |
| 5.BD.20b | Parisite-(Ce) | CaCe2(CO3)3F2 |
| 5.BD.20a | Bastnäsite-(La) | La(CO3)F |
| 5.BD.20b | Parisite-(Nd) | Ca(Nd,Ce,La)2(CO3)3F2 |
| 5.BD.20b | Parisite-(La) | CaLa2(CO3)3F2 |
| 5.BD.20d | Röntgenite-(Ce) | Ca2(Ce,La)3(CO3)5F3 |
| 5.BD.20a | Thorbastnäsite | ThCa(CO3)2F2 · 3H2O |
| 5.BD.20a | Hydroxylbastnäsite-(Ce) | Ce(CO3)(OH) |
| 5.BD.20a | Hydroxylbastnäsite-(Nd) | Nd(CO3)(OH) |
| 5.BD.20c | 'Hydroxylsynchysite-(Ce)' | Ca(Ce,La)(CO3)2(OH) |
| 5.BD.20c | 'Synchysite-(La)' | Ca(La,Nd)(CO3)2F |
| 5.BD.20a | Bastnäsite-(Nd) | Nd(CO3)F |
| 5.BD.20a | Hydroxylbastnäsite-(La) | (La,Nd,Ce)(CO3)(OH,F) |
| 5.BD.25 | Qaqarssukite-(Ce) | Ba(Ce,REE)(CO3)2F |
| 5.BD.25 | Horváthite-(Y) | NaY(CO3)F2 |
| 5.BD.35 | Huanghoite-(Ce) | BaCe(CO3)2F |
| 5.BD.35 | Huanghoite-(Nd) | BaNd(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 Bastnäsite-(Y)
mindat.org URL:
https://www.mindat.org/min-562.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
Mineral Dealers:
References for Bastnäsite-(Y)
Localities for Bastnäsite-(Y)
Showing 19 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.
Brazil | |
| Zapata Montoya et al. (2026) |
China | |
| Liu et al. (2024) |
| Pekov (1998) |
Egypt | |
| Fathy et al. (2025) |
| Elsagheer et al. (2026) |
Finland | |
| Pavel M. Kartashov analythical data (2014) |
Germany | |
| Haack et al. (1987) |
Japan | |
| 皆川鉄雄 et al. (2001) |
Kazakhstan (TL) | |
| Fleischer (1972) +1 other reference |
Kyrgyzstan | |
| Dill (1999) +1 other reference |
Norway | |
| ... |
| Husdal (2021) |
| Husdal (2023) | |
Russia | |
| Voloshin et al. (2005) +1 other reference |
| Zozulya et al. (2022) |
South Africa | |
| Atanasova et al. (2016) |
South Korea | |
| Pavel M. Kartashov (n.d.) |
Tajikistan | |
| Pavel M. Kartashov analytical data (2011) |
USA | |
| www.museum.mtu.edu (n.d.) |
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Verkhnee Espe Massif, Akzhaylyautas Mts, Tarbagatai Range, Abai Region, Kazakhstan