Thalénite-(Y) (original) (raw)
A valid IMA mineral species
About Thalénite-(Y)Hide
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Colour:
Pale pink, brown or greenish
Crystal System:
Monoclinic
Name:
Named in honour 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.
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.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:3931:0
306521ae-e869-438d-abde-17652839ea6d
IMA Classification of Thalénite-(Y)Hide
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IMA status notes:
Renamed by the IMA
Approval history:
Renamed by IMA: 2014
Classification of Thalénite-(Y)Hide
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9.BJ.20
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
14.8.1
14 : Silicates not Containing Aluminum
8 : Silicates of Group III metals other than Al
Mineral SymbolsHide
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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)Hide
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Colour:
Pale pink, brown or greenish
Optical Data of Thalénite-(Y)Hide
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RI values:
_n_α = 1.731 _n_β = 1.738 _n_γ = 1.744
2V:
Measured: 68° , Calculated: 84°
δ = 0.013
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Chemistry of Thalénite-(Y)Hide
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Crystallography of Thalénite-(Y)Hide
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Crystal System:
Monoclinic
Cell Parameters:
a = 7.3464(4) Å, b = 11.1726(5) Å, c = 10.4180(5) Å
β = 97.318(4)°
Ratio:
a:b:c = 0.658 : 1 : 0.932
X-Ray Powder DiffractionHide
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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 EnvironmentHide
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Type Occurrence of Thalénite-(Y)Hide
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Place of Conservation of Type Material:
Swedish Museum of Natural History, Stockholm, Sweden, number 520157 (holotype).
Synonyms of Thalénite-(Y)Hide
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Other Language Names for Thalénite-(Y)Hide
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Common AssociatesHide
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Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat GroupingHide
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| 9.BJ. | Arsenmedaite | Mn2+6 As5+Si5O18(OH) | Mon. 2/m |
|---|---|---|---|
| 9.BJ.05 | Orientite | Ca8Mn3+10(SiO4)3(Si3O10)3(OH)10 · 4H2O | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 9.BJ.10 | Rosenhahnite | HCa3[Si3O9(OH)] | Tric. 1 : _P_1 |
| 9.BJ.15 | Trabzonite | Ca4(Si3O9)(OH)2 | Orth. m _m_2 : A m _a_2 |
| 9.BJ.25 | Tiragalloite | Mn2+4As5+Si3O12(OH) | Mon. 2/m |
| 9.BJ.30 | Medaite | Mn2+6V5+Si5O18(OH) | Mon. 2/m |
| 9.BJ.35 | Ruizite | Ca2Mn3+2[Si4O11(OH)2](OH)2 · 2H2O | Mon. 2 |
| 9.BJ.35 | Taniajacoite | SrCaMn3+2Si4O11(OH)4 · 2H2O | Tric. 1 |
| 9.BJ.35 | Strontioruizite | Sr2Mn3+2Si4O11(OH)4 · 2H2O | Mon. 2 : _B_2 |
| 9.BJ.40 | Ardennite-(As) | Mn2+4Al4(AlMg)(AsO4)(SiO4)2(Si3O10)(OH)6 | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 9.BJ.40 | Ardennite-(V) | Mn2+4Al4(AlMg)(VO4)(SiO4)2(Si3O10)(OH)6 | Orth. m m m _(_2/_m_2/_m_2/m ) : P m m n |
| 9.BJ.40 | Kannanite | Ca4Al4(AlMg)(VO4)(SiO4)2(Si3O10)(OH)6 | Orth. m m m _(_2/_m_2/_m_2/m ) : P m m n |
| 9.BJ.40 | Alpeite | Ca4Mn3+2Al2(Mn3+Mg)(SiO4)2(Si3O10)(V5+O4)(OH)6 | Orth. m m m _(_2/_m_2/_m_2/m ) : P m m n |
| 9.BJ.45 | Kilchoanite | Ca6(SiO4)(Si3O10) | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 9.BJ.50 | Kornerupine | Mg3Al6(Si,Al,B)5O21(OH) | Orth. m m m _(_2/_m_2/_m_2/m ) : C m c m |
| 9.BJ.50 | Prismatine | (◻,Fe,Mg)(Mg,Al,Fe)5Al4Si2(Si,Al)2(B,Si,Al)(O,OH,F)22 | Orth. m m m _(_2/_m_2/_m_2/m ) : C m c m |
| 9.BJ.55 | Zunyite | Al13Si5O20(OH,F)18Cl | Iso. 43_m_ : F_43_m |
| 9.BJ.60 | Hubeite | Ca2Mn2+Fe3+Si4O12(OH) · 2H2O | Tric. 1 : _P_1 |
| 9.BJ.65 | Cassagnaite | (Ca,Mn2+)4(Fe3+,Mn3+,Al)4(V3+,Mg,Al)2(Si3O10)(SiO4)2(OH,O)8 | Orth. m m m _(_2/_m_2/_m_2/m ) : C m c m |
| 9.BJ.70 | Pavlovskyite | Ca8(SiO4)2(Si3O10) | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c n |
Other InformationHide
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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)Hide
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References for Thalénite-(Y)Hide
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Reference List:
Kornev, A.N., Batalieva, N.G., Maksimov, B.A., Ilyukhin, V.V., Belov, N.V. (1972). Crystal structure of thalenite Y3Si3O10. Doklady Akademii Nauk SSSR, 202, 1324-1327. (In Russian.)
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)Hide
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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.
Locality ListHide
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- 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.