Thalénite-(Y)
A valid IMA mineral species
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About Thalénite-(Y)
T. Robert Thalén
Formula:
Y3Si3O10F
Colour:
Pale pink, brown or greenish
Lustre:
Greasy
Hardness:
6
Crystal System:
Monoclinic
Name:
Named in honor of Tobias Robert Thalén (28 December 1827, Köping, Sweden – 27 July 1905, Uppsala, Sweden), physicist and astronomer. He developed a method of discovering iron deposits using magnetic fields.
Originally, the English spelling was thalenite. Modified to thalenite-(Y) in 1987 to denote the dominant rare earth element. Modified again in 2007 to add the diacritical mark.
Originally, the English spelling was thalenite. Modified to thalenite-(Y) in 1987 to denote the dominant rare earth element. Modified again in 2007 to add the diacritical mark.
Type Locality:
This mineral is found in granite pegmatites, associated with Fergusonite, Magnetite, etc.
Earlier defined as the OH-analog of fluorthalénite-(Y) (now descredited). Škoda et al (2015) re-examined the type material and found that it showed dominance of F over OH, thus the type material actually corresponds to the species earlier defined as fluorthalénite-(Y).
Redefined by IMA in 2014 (IMA 14-D) as a F-dominant species with ideal composition Y3Si3O10F and given the name Thalénite-(Y) as it has historical priority.
Earlier defined as the OH-analog of fluorthalénite-(Y) (now descredited). Škoda et al (2015) re-examined the type material and found that it showed dominance of F over OH, thus the type material actually corresponds to the species earlier defined as fluorthalénite-(Y).
Redefined by IMA in 2014 (IMA 14-D) as a F-dominant species with ideal composition Y3Si3O10F and given the name Thalénite-(Y) as it has historical priority.
Unique Identifiers
Mindat ID:
3931
Long-form identifier:
mindat:1:1:3931:0
GUID
(UUID V4):
(UUID V4):
306521ae-e869-438d-abde-17652839ea6d
IMA Classification of Thalénite-(Y)
Approved
IMA status notes:
Renamed by the IMA
First published:
1898
Approval history:
Renamed by IMA: 2014
Classification of Thalénite-(Y)
9.BJ.20
9 : SILICATES (Germanates)
B : Sorosilicates
J : Sorosilicates with Si3O10, Si4O11, etc. anions; cations in octahedral [6] and greater coordination
9 : SILICATES (Germanates)
B : Sorosilicates
J : Sorosilicates with Si3O10, Si4O11, etc. anions; cations in octahedral [6] and greater coordination
55.2.1b.2
55 : SOROSILICATES Si2O7 Groups,Generally with no Additional Anions
2 : Si2O7 Groups, Generally with no Additional Anions with cations in [6] coordination
55 : SOROSILICATES Si2O7 Groups,Generally with no Additional Anions
2 : Si2O7 Groups, Generally with no Additional Anions with cations in [6] coordination
14.8.1
14 : Silicates not Containing Aluminum
8 : Silicates of Group III metals other than Al
14 : Silicates not Containing Aluminum
8 : Silicates of Group III metals other than Al
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 |
|---|---|---|
| Tlé-Y | 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 Thalénite-(Y)
Greasy
Transparency:
Translucent
Colour:
Pale pink, brown or greenish
Streak:
White
Hardness:
6 on Mohs scale
Tenacity:
Brittle
Optical Data of Thalénite-(Y)
Type:
Biaxial (-)
RI values:
nα = 1.731 nβ = 1.738 nγ = 1.744
2V:
Measured: 68° , Calculated: 84°
Max Birefringence:
δ = 0.013
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r > v
Chemistry of Thalénite-(Y)
Mindat Formula:
Y3Si3O10F
Elements listed:
Crystallography of Thalénite-(Y)
Crystal System:
Monoclinic
Cell Parameters:
a = 7.3464(4) Å, b = 11.1726(5) Å, c = 10.4180(5) Å
β = 97.318(4)°
β = 97.318(4)°
Ratio:
a:b:c = 0.658 : 1 : 0.932
Unit Cell V:
848.13 ų
Z:
4
Comment:
Spacegroup P21/n
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.104 Å | (very strong) |
| 2.808 Å | (moderate +) |
| 5.52 Å | (moderate) |
| 3.79 Å | (moderate) |
| 3.276 Å | (moderate) |
| 3.159 Å | (moderate) |
| 3.453 Å | (moderately weak) |
Comments:
Kingman, Arizona, USA. Data are from Fitzpatrick and Pabst (1986). Adams et al. (1962) give unindexed data but with numerical intensities.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 34 : Complex granite pegmatites |
Type Occurrence of Thalénite-(Y)
Place of Conservation of Type Material:
Swedish Museum of Natural History, Stockholm, Sweden, number 520157 (holotype).
Synonyms of Thalénite-(Y)
Other Language Names for Thalénite-(Y)
German:Thalenit-(Y)
Russian:Таленит-(Y)
Common Associates
Associated Minerals Based on Photo Data:
| 19 photos of Thalénite-(Y) associated with Yttrofluorite | (Ca1-xYx)F2+x where 0.05< x |
| 11 photos of Thalénite-(Y) associated with Allanite-(Ce) | (CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH) |
| 9 photos of Thalénite-(Y) associated with Tengerite-(Y) | Y2(CO3)3 · 2-3H2O |
| 8 photos of Thalénite-(Y) associated with Allanite-(Y) | (CaY)(AlAlFe2+)O[Si2O7][SiO4](OH) |
| 5 photos of Thalénite-(Y) associated with Keiviite-(Y) | Y2Si2O7 |
| 5 photos of Thalénite-(Y) associated with Yttrocrasite-(Y) | (Y,Th,Ca,U)(Ti,Fe)2(O,OH)6 |
| 3 photos of Thalénite-(Y) associated with Fluorite | CaF2 |
| 3 photos of Thalénite-(Y) associated with Kimuraite-(Y) | Ca(Y,Nd)2(CO3)4 · 6H2O |
| 2 photos of Thalénite-(Y) associated with Iimoriite-(Y) | Y2[SiO4][CO3] |
| 2 photos of Thalénite-(Y) associated with Allanite-(Nd) | (CaNd)(AlAlFe2+)O[Si2O7][SiO4](OH) |
Related Minerals - Strunz-mindat Grouping
| 9.BJ. | Arsenmedaite | Mn2+6 As5+Si5O18(OH) |
| 9.BJ.05 | Orientite | Ca8Mn3+10(SiO4)3(Si3O10)3(OH)10 · 4H2O |
| 9.BJ.10 | Rosenhahnite | HCa3[Si3O9(OH)] |
| 9.BJ.15 | Trabzonite | Ca4(Si3O9)(OH)2 |
| 9.BJ.25 | Tiragalloite | Mn2+4As5+Si3O12(OH) |
| 9.BJ.30 | Medaite | Mn2+6V5+Si5O18(OH) |
| 9.BJ.35 | Ruizite | Ca2Mn3+2[Si4O11(OH)2](OH)2 · 2H2O |
| 9.BJ.35 | Taniajacoite | SrCaMn3+2Si4O11(OH)4 · 2H2O |
| 9.BJ.35 | Strontioruizite | Sr2Mn3+2Si4O11(OH)4 · 2H2O |
| 9.BJ.40 | Ardennite-(As) | Mn2+4Al4(AlMg)(AsO4)(SiO4)2(Si3O10)(OH)6 |
| 9.BJ.40 | Ardennite-(V) | Mn2+4Al4(AlMg)(VO4)(SiO4)2(Si3O10)(OH)6 |
| 9.BJ.40 | Kannanite | Ca4Al4(AlMg)(VO4)(SiO4)2(Si3O10)(OH)6 |
| 9.BJ.40 | Alpeite | Ca4Mn3+2Al2(Mn3+Mg)(SiO4)2(Si3O10)(V5+O4)(OH)6 |
| 9.BJ.45 | Kilchoanite | Ca6(SiO4)(Si3O10) |
| 9.BJ.50 | Kornerupine | Mg3Al6(Si,Al,B)5O21(OH) |
| 9.BJ.50 | Prismatine | (◻,Fe,Mg)(Mg,Al,Fe)5Al4Si2(Si,Al)2(B,Si,Al)(O,OH,F)22 |
| 9.BJ.55 | Zunyite | Al13Si5O20(OH,F)18Cl |
| 9.BJ.60 | Hubeite | Ca2Mn2+Fe3+Si4O12(OH) · 2H2O |
| 9.BJ.65 | Cassagnaite | (Ca,Mn2+)4(Fe3+,Mn3+,Al)4(V3+,Mg,Al)2(Si3O10)(SiO4)2(OH,O)8 |
| 9.BJ.70 | Pavlovskyite | Ca8(SiO4)2(Si3O10) |
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 Thalénite-(Y)
mindat.org URL:
https://www.mindat.org/min-3931.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
References for Thalénite-(Y)
Reference List:
Nickel, Ernest H., Mandarino, Joseph A. (1987) Procedures involving the IMA Commission on New Minerals and Mineral Names and guidelines on mineral nomenclature. American Mineralogist, 72 (9-10) 1031-1042
Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2014) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC), CNMNC Newsletter No. 22. Mineralogical Magazine, 78 (5) 1241-1248 doi:10.1180/minmag.2014.078.5.10
Škoda, Radek, Plášil, Jakub, Jonsson, Erik, Čopjaková, Renata, Langhof, Jörgen, Galiová, Michaela Vašinová (2015) Redefinition of thalénite-(Y) and discreditation of fluorthalénite-(Y): A re-investigation of type material from the Österby pegmatite, Dalarna, Sweden, and from additional localities. Mineralogical Magazine, 79 (4) 965-983 doi:10.1180/minmag.2015.079.4.07
Localities for Thalénite-(Y)
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.
China | |
| Feng et al. (2022) |
Finland | |
| Vorma et al. (1966) |
Italy | |
| Ciriotti. M.E. et al. (2021) |
| Ciriotti et al. (2021) | |
Japan | |
| Am Min 69:196-199 +2 other references |
| Škoda et al. (2015) |
| Nishio–Hamane et al. (2022) |
Kazakhstan | |
| Stepanov et al. (2012) |
Norway | |
| Bjørlykke (1934) |
| Bjørlykke (1934) |
| Pers. commentary Borghild Nilssen ... | |
| Stensrud (2009) | |
| Bjørlykke (1934) |
| Bjørlykke (1934) | |
| Schetelig (1931) +1 other reference |
| Griffin et al. (1979) |
| Husdal (2021) |
| Husdal (2008) +1 other reference | |
| Vogt (1922) +2 other references |
| Larsen (1990) +2 other references | |
| Grauch et al. (1994) |
| Kristiansen (1998) |
Russia | |
| ... |
| Irina V. Kozyreva data |
| Lyalina et al. (2007) +1 other reference |
| Pekov (1998) |
| Voloshin A.V. et al. (1986) +2 other references | |
| Kalashnikov et al. (2016) | |
| |
Saudi Arabia | |
| Gahlan et al. (2021) |
Spain | |
| Tanago et al. (2012) |
Sweden | |
| Natural History Museum |
| Benedicks C (1898) +1 other reference |
| Natural History Museum +1 other reference |
| Škoda et al. (2015) |
| University of Adelaide |
USA | |
| Galbraith (1959) +4 other references |
| Simmons et al. (1980) +1 other reference |
| Carnein et al. (2005) |
| Adams +3 other references | |
| Rocks & Minerals (1991) |
| Smith (1991) |
| Markus B. Raschke et al. (2016) |
| www.uwrf.edu/~wc01 |
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Hundholmen, Narvik, Nordland, Norway