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Tantalaeschynite-(Y)

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About Tantalaeschynite-(Y)Hide

Formula:
Y(Ta,Ti,Nb)2O6
Colour:
brownish black, black
Lustre:
Resinous
Hardness:
5½ - 6
Crystal System:
Orthorhombic
Name:
Named as the tantalian end-member of a series with aeschynite-(Y).
The Ta analogue of Aeschynite-(Y).


Classification of Tantalaeschynite-(Y)Hide

Approved
4.DF.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
F : With large (+- medium-sized) cations; dimers and trimers of edgesharing octahedra
8.3.6.4

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
3 : AB2O6
18.2.18

18 : Niobates and Tantalates
2 : Niobates and tantalates containing rare earths but not U

Physical Properties of Tantalaeschynite-(Y)Hide

Resinous
Colour:
brownish black, black
Streak:
yellowish brown
Hardness:
5½ - 6 on Mohs scale
Cleavage:
None Observed

Chemical Properties of Tantalaeschynite-(Y)Hide

Formula:
Y(Ta,Ti,Nb)2O6

Crystallography of Tantalaeschynite-(Y)Hide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:
a = 7.38 Å, b = 10.97 Å, c = 5.34 Å
Ratio:
a:b:c = 0.673 : 1 : 0.487
Unit Cell V:
432.32 ų (Calculated from Unit Cell)
Z:
4
Comment:
Space group Pmnb (non-standard setting)

Type Occurrence of Tantalaeschynite-(Y)Hide

Other Language Names for Tantalaeschynite-(Y)Hide

Relationship of Tantalaeschynite-(Y) to other SpeciesHide

Other Members of this group:
Aeschynite-(Ce)(Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6Orth. mmm (2/m 2/m 2/m) : Pmna
Aeschynite-(Nd)(Nd,Ln,Ca)(Ti,Nb)2(O,OH)6Orth. mmm (2/m 2/m 2/m)
Aeschynite-(Y)(Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6Orth. mmm (2/m 2/m 2/m) : Pmna
Nioboaeschynite-(Ce)(Ce,Ca)(Nb,Ti)2(O,OH)6Orth.
Nioboaeschynite-(Nd)(Nd,Ce,Ca,Th)(Nb,Ti,Fe,Ta)2(O,OH)6Orth.
Nioboaeschynite-(Y)(Y,REE,Ca,Th,Fe)(Nb,Ti,Ta)2(O,OH)6Orth. mmm (2/m 2/m 2/m) : Pban
RynersoniteCaTa2O6Orth. mmm (2/m 2/m 2/m)
Vigezzite(Ca,Ce)(Nb,Ta,Ti)2O6Orth.
Forms a series with:

Common AssociatesHide

Associated Minerals Based on Photo Data:
Fergusonite-(Y)1 photo of Tantalaeschynite-(Y) associated with Fergusonite-(Y) on mindat.org.
Formanite-(Y)1 photo of Tantalaeschynite-(Y) associated with Formanite-(Y) on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

4.DF.05Aeschynite-(Ce)(Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6Orth. mmm (2/m 2/m 2/m) : Pmna
4.DF.05Aeschynite-(Nd)(Nd,Ln,Ca)(Ti,Nb)2(O,OH)6Orth. mmm (2/m 2/m 2/m)
4.DF.05Aeschynite-(Y)(Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6Orth. mmm (2/m 2/m 2/m) : Pmna
4.DF.05Nioboaeschynite-(Ce)(Ce,Ca)(Nb,Ti)2(O,OH)6Orth.
4.DF.05Nioboaeschynite-(Nd)(Nd,Ce,Ca,Th)(Nb,Ti,Fe,Ta)2(O,OH)6Orth.
4.DF.05Nioboaeschynite-(Y)(Y,REE,Ca,Th,Fe)(Nb,Ti,Ta)2(O,OH)6Orth. mmm (2/m 2/m 2/m) : Pban
4.DF.05RynersoniteCaTa2O6Orth. mmm (2/m 2/m 2/m)
4.DF.05Vigezzite(Ca,Ce)(Nb,Ta,Ti)2O6Orth.
4.DF.10ChangbaiitePbNb2O6Trig.
4.DF.15Murataite-(Y)(Y,Na)6Zn(Zn,Fe3+)4(Ti,Nb,Na)12O29(O,F,OH)10F4 Iso. m3m (4/m 3 2/m) : Fm3m

Related Minerals - Dana Grouping (8th Ed.)Hide

8.3.6.1Aeschynite-(Ce)(Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6Orth. mmm (2/m 2/m 2/m) : Pmna
8.3.6.2Nioboaeschynite-(Ce)(Ce,Ca)(Nb,Ti)2(O,OH)6Orth.
8.3.6.3Aeschynite-(Y)(Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6Orth. mmm (2/m 2/m 2/m) : Pmna
8.3.6.5Aeschynite-(Nd)(Nd,Ln,Ca)(Ti,Nb)2(O,OH)6Orth. mmm (2/m 2/m 2/m)
8.3.6.7Nioboaeschynite-(Y)(Y,REE,Ca,Th,Fe)(Nb,Ti,Ta)2(O,OH)6Orth. mmm (2/m 2/m 2/m) : Pban

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

18.2.1Fergusonite-(Y)YNbO4Tet. 4/m : I41/a
18.2.2Fergusonite-(Y)-βYNbO4Mon. 2/m
18.2.3Fergusonite-(Ce)(Ce,La,Nd)NbO4
18.2.4Fergusonite-(Ce)-β(Ce,La,Nd)NbO4
18.2.5Fergusonite-(Nd)(Nd,Ce)(Nb,Ti)O4
18.2.6Fergusonite-(Nd)-β(Nd,Ce)NbO4
18.2.7Formanite-(Y)YTaO4Tet. 4/m : I41/a
18.2.8Pyrochlore GroupA2Nb2(O,OH)6Z
18.2.9Ceriopyrochlore (of Hogarth 1977)A2Nb2(O,OH)6Z
18.2.10Strontiopyrochlore (of Hogarth 1977)A2Nb2(O,OH)6Z
18.2.11Loparite-(Ce)(Na,REE)Ti2O6
18.2.12Fersmite(Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6Orth. mmm (2/m 2/m 2/m) : Pbcn
18.2.13Aeschynite-(Ce)(Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6Orth. mmm (2/m 2/m 2/m) : Pmna
18.2.14Aeschynite-(Nd)(Nd,Ln,Ca)(Ti,Nb)2(O,OH)6Orth. mmm (2/m 2/m 2/m)
18.2.15Aeschynite-(Y)(Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6Orth. mmm (2/m 2/m 2/m) : Pmna
18.2.16Nioboaeschynite-(Ce)(Ce,Ca)(Nb,Ti)2(O,OH)6Orth.
18.2.17Nioboaeschynite-(Nd)(Nd,Ce,Ca,Th)(Nb,Ti,Fe,Ta)2(O,OH)6Orth.
18.2.19Vigezzite(Ca,Ce)(Nb,Ta,Ti)2O6Orth.
18.2.20Murataite-(Y)(Y,Na)6Zn(Zn,Fe3+)4(Ti,Nb,Na)12O29(O,F,OH)10F4 Iso. m3m (4/m 3 2/m) : Fm3m

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Tantalaeschynite-(Y)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Mineralogical Magazine (1974): 39: 571-576.
American Mineralogist (1974): 59: 1331.

Internet Links for Tantalaeschynite-(Y)Hide

Localities for Tantalaeschynite-(Y)Hide

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

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Brazil (TL)
 
  • Paraíba
    • Borborema mineral province
      • São José do Sabugi
Rocks&Min.(Jan.2000)
China
 
  • Hunan Province
    • Chenzhou Prefecture
      • Yizhang Co.
        • Dongpo ore field
Yihong Sun and Xiangmei Ren (1986): Acta Mineralogica Sinica 6(2), 179-187
Poland
 
  • Lower Silesia (Dolnośląskie)
    • Jawor District
SZEŁĘG E., CIURLA A., 2004: Preliminary data on Nb-Ta oxides in pegmatites
Mineral and/or Locality  
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