Tanteuxenite-(Y)
A valid IMA mineral species - grandfathered
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About Tanteuxenite-(Y)
Formula:
Y(Ta,Nb,Ti)2(O,OH)6
Colour:
Brown-black; amber-yellow (transmitted light)
Lustre:
Resinous
Hardness:
5½ - 6
Specific Gravity:
5.4 - 5.9
Crystal System:
Orthorhombic
Member of:
Name:
The name reflects its tantalum content and similarity to euxenite-(Y).
Type Locality:
Isostructural with:
This page provides mineralogical data about Tanteuxenite-(Y).
Unique Identifiers
Mindat ID:
3883
Long-form identifier:
mindat:1:1:3883:2
IMA Classification of Tanteuxenite-(Y)
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Y(Ta5+Ti4+)O6
Classification of Tanteuxenite-(Y)
4.DG.05
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
G : With large (+- medium-sized) cations; chains of edge-sharing octahedra
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
G : With large (+- medium-sized) cations; chains of edge-sharing octahedra
8.3.8.3
8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
3 : AB2O6
8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
3 : AB2O6
18.4.6
18 : Niobates and Tantalates
4 : Niobates and tantalates containing both U and rare earths
18 : Niobates and Tantalates
4 : Niobates and tantalates containing both U and rare earths
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 for Standard |
|---|---|---|
| Ttx-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 Tanteuxenite-(Y)
Resinous
Transparency:
Opaque
Comment:
transparent in thin fragments.
Colour:
Brown-black; amber-yellow (transmitted light)
Hardness:
5½ - 6 on Mohs scale
Tenacity:
Brittle
Fracture:
Sub-Conchoidal
Density:
5.4 - 5.9 g/cm3 (Measured)
Optical Data of Tanteuxenite-(Y)
Type:
Isotropic
Chemistry of Tanteuxenite-(Y)
Mindat Formula:
Y(Ta,Nb,Ti)2(O,OH)6
Element Weights:
Crystallography of Tanteuxenite-(Y)
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Pbcn
Setting:
Pbcn
Cell Parameters:
a = 14.574(3) Å, b = 5.555(1) Å, c = 5.184(4) Å
Ratio:
a:b:c = 2.624 : 1 : 0.933
Unit Cell V:
419.69 ų (Calculated from Unit Cell)
Z:
4
Comment:
metamict
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 26 : Hadean detrital minerals | |
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 34 : Complex granite pegmatites |
Type Occurrence of Tanteuxenite-(Y)
General Appearance of Type Material:
Crystals indistinct, tabular, to 5 cm, with {100} and {110} striated.
Place of Conservation of Type Material:
The Natural History Museum, London, England, 1928,340-341.
Synonyms of Tanteuxenite-(Y)
Other Language Names for Tanteuxenite-(Y)
Dutch:Tanteuxeniet-(Y)
German:Tanteuxenit-(Y)
Relationship of Tanteuxenite-(Y) to other Species
Member of:
Other Members of Euxenite Group:
| Euxenite-(Y) | (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6 | Orth. mmm(2/m2/m2/m) : Pbcn |
| Fersmite | CaNb2O6 | Orth. mmm(2/m2/m2/m) : Pbcn |
| Kobeite-(Y) | (Y,U)(Ti,Nb)2(O,OH)6 (?) | Iso. |
| Loranskite-(Y) | (Y,Ce,Ca)ZrTaO6 (?) | |
| Uranopolycrase | (U4+,Y)(Ti,Nb)2O6 | Orth. mmm(2/m2/m2/m) : Pbcn |
| Yttrocrasite-(Y) | (Y,Th,Ca,U)(Ti,Fe)2(O,OH)6 | Amor. |
Common Associates
Associations Based on Photo Data:
| 7 photos of Tanteuxenite-(Y) associated with Euxenite-(Y) | (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6 |
| 3 photos of Tanteuxenite-(Y) associated with 'Strüverite' | (Ti,Ta,Fe)O2 |
| 3 photos of Tanteuxenite-(Y) associated with Albite | Na(AlSi3O8) |
| 1 photo of Tanteuxenite-(Y) associated with Quartz | SiO2 |
| 1 photo of Tanteuxenite-(Y) associated with Yttrotantalite-(Y) | (Y,U,Fe2+)(Ta,Nb)(O,OH)4 |
| 1 photo of Tanteuxenite-(Y) associated with Microcline | K(AlSi3O8) |
| 1 photo of Tanteuxenite-(Y) associated with Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| 1 photo of Tanteuxenite-(Y) associated with Fluorapatite | Ca5(PO4)3F |
Related Minerals - Strunz-mindat Grouping
| 4.DG.05 | Fersmite | CaNb2O6 |
| 4.DG.05 | Uranopolycrase | (U4+,Y)(Ti,Nb)2O6 |
| 4.DG.05 | Yttrocrasite-(Y) | (Y,Th,Ca,U)(Ti,Fe)2(O,OH)6 |
| 4.DG.05 | Loranskite-(Y) | (Y,Ce,Ca)ZrTaO6 (?) |
| 4.DG.05 | Euxenite-(Y) | (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6 |
| 4.DG.05 | Kobeite-(Y) | (Y,U)(Ti,Nb)2(O,OH)6 (?) |
| 4.DG.10 | Yttrotantalite-(Y) | (Y,U,Fe2+)(Ta,Nb)(O,OH)4 |
| 4.DG.10 | Clinofergusonite-(Y) | YNbO4 |
| 4.DG.10 | Clinofergusonite-(Nd) | (Nd,Ce)NbO4 |
| 4.DG.10 | Clinofergusonite-(Ce) | CeNbO4 |
| 4.DG.15 | Foordite | Sn2+Nb2O6 |
| 4.DG.15 | Thoreaulite | Sn2+Ta2O6 |
| 4.DG.20 | Raspite | Pb(WO4) |
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 Tanteuxenite-(Y)
mindat.org URL:
https://www.mindat.org/min-3883.html
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References for Tanteuxenite-(Y)
Localities for Tanteuxenite-(Y)
Showing 23 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.
Australia | |
| The Simpson Mineral Collection of the ... |
| Journ.Roy.Soc.West. Australia (1928) +3 other references |
| Jacobson et al. (2007) +2 other references | |
| Simpson (1928) |
| Jacobson et al. (2007) | |
| Jacobson et al. (2007) | |
| Simpson (1928) +1 other reference |
| Peter Downes |
Austria | |
| Zappel (1986) +1 other reference |
Bulgaria | |
| Svetoslav Petrussenko et al. (2007) |
Canada | |
| Pe-Piper +1 other reference |
DR Congo | |
| www.africamuseum.be (n.d.) |
| Bernard et al. (2004) |
Germany | |
| Habel (2001) |
Italy | |
| Daniele Ravagnani - I giacimenti ... +3 other references |
| Piccoli et al. (2007) |
| Daniele Ravagnani - I giacimenti ... |
| Piccoli et al. (2007) | |
Malawi | |
| Becker |
Sweden | |
| Pavel M. Kartashov (n.d.) |
USA | |
| Fred E. Davis Collection |
| Buchholz et al. (2013) |
| Self-collected by Franklin Roberts. |
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Ytterby, Resarö, Vaxholm, Stockholm County, Sweden