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Tantalaeschynite-(Y)

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Big Photo

Paszowice (Pokutnik; Galgenberg; Poischwitz), Jawor District, Strzegom-Sobótka Massif, Lower Silesia (Dolnośląskie), Poland
© E. Szełęg

Show Tantalaeschynite-(Y) Photos (2)



Formula:
(Y,Ce,Ca)(Ta,Ti,Nb)
 
2
O
 
6
System:OrthorhombicColour:brownish black, black
Hardness:5½ - 6
Member of:Aeschynite Group
Name:Named as the tantalian end-member of a series with aeschynite-(Y).


The Ta analogue of Aeschynite-(Y).

Classification of Tantalaeschynite-(Y)

IMA status:Approved
Strunz 8th edition ID:4/D.21-80
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID:8.3.6.4

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
3 : AB2O6
Hey's CIM Ref.:18.2.18

18 : Niobates and Tantalates
2 : Niobates and tantalates containing rare earths but not U
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Type Occurrence of Tantalaeschynite-(Y)

Type Locality:Raposa pegmatite, São José do Sabugi, Borborema mineral province, Paraíba, Brazil

Physical Properties of Tantalaeschynite-(Y)

Lustre:Resinous
Colour:brownish black, black
Streak:yellowish brown
Hardness (Mohs):5½ - 6
Cleavage:None Observed

Crystallography of Tantalaeschynite-(Y)

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

Chemical Properties of Tantalaeschynite-(Y)

Formula:
(Y,Ce,Ca)(Ta,Ti,Nb)
 
2
O
 
6
Essential elements:O, Ta, Y
All elements listed in formula:Ca, Ce, Nb, O, Ta, Ti, Y

Relationship of Tantalaeschynite-(Y) to other Species

Series:Forms a series with Aeschynite-(Y) (see here)
Member of:Aeschynite Group
Other Members of Group:

- +
Aeschynite-(Ce)
(Ce,Ca,Fe,Th)(Ti,Nb)
 
2
(O,OH)
 
6
Aeschynite-(Nd)
(Nd,Ce,Ca)(Ti,Nb)
 
2
(O,OH)
 
6
Aeschynite-(Y)
(Y,Ca,Fe,Th)(Ti,Nb)
 
2
(O,OH)
 
6
Nioboaeschynite-(Ce)
(Ce,Ca,Th)(Nb,Ti)
 
2
(O,OH)
 
6
Nioboaeschynite-(Nd)
(Nd,Ce,Ca,Th)(Nb,Ti,Fe,Ta)
 
2
(O,OH)
 
6
Nioboaeschynite-(Y)
(Y,Ca,Ce,Nd,Th)(Nb,Ti,Ta)
 
2
(O,OH)
 
6
Rynersonite
Ca(Ta,Nb)
 
2
O
 
6
Vigezzite
(Ca,Ce)(Nb,Ti)
 
2
O
 
6
Related Minerals - Nickel-Strunz Grouping):

- +
4.DF.05Aeschynite-(Ce)
(Ce,Ca,Fe,Th)(Ti,Nb)
 
2
(O,OH)
 
6
4.DF.05Aeschynite-(Nd)
(Nd,Ce,Ca)(Ti,Nb)
 
2
(O,OH)
 
6
4.DF.05Aeschynite-(Y)
(Y,Ca,Fe,Th)(Ti,Nb)
 
2
(O,OH)
 
6
4.DF.05Nioboaeschynite-(Ce)
(Ce,Ca,Th)(Nb,Ti)
 
2
(O,OH)
 
6
4.DF.05Nioboaeschynite-(Nd)
(Nd,Ce,Ca,Th)(Nb,Ti,Fe,Ta)
 
2
(O,OH)
 
6
4.DF.05Nioboaeschynite-(Y)
(Y,Ca,Ce,Nd,Th)(Nb,Ti,Ta)
 
2
(O,OH)
 
6
4.DF.05Rynersonite
Ca(Ta,Nb)
 
2
O
 
6
4.DF.05Vigezzite
(Ca,Ce)(Nb,Ti)
 
2
O
 
6
4.DF.10Changbaiite
PbNb
 
2
O
 
6
4.DF.15Murataite-(Y)
(Y,Na)
 
6
Zn(Zn,Fe
3+
 
)
 
4
(Ti,Nb,Na)
 
12
O
 
29
(O,F,OH)
 
10
F
 
4
Related Minerals - Hey's Index Grouping:

- +
18.2.1Fergusonite-(Y)
YNbO
 
4
18.2.2β-Fergusonite-(Y)
YNbO
 
4
18.2.3Fergusonite-(Ce)
(Ce,La,Nd)NbO
 
4
18.2.4β-Fergusonite-(Ce)
(Ce,La,Nd)NbO
 
4
18.2.5Fergusonite-(Nd)
(Nd,Ce)(Nb,Ti)O
 
4
18.2.6β-Fergusonite-(Nd)
(Nd,Ce)NbO
 
4
18.2.7Formanite-(Y)
YTaO
 
4
18.2.8Pyrochlore Group
A
 
2
Nb
 
2
(O,OH)
 
6
Z
18.2.9Ceriopyrochlore (of Hogarth 1977)
18.2.10Strontiopyrochlore (of Hogarth 1977)
18.2.11Loparite-(Ce)
(Na,Ce,Ca,Sr,Th)(Ti,Nb,Fe)O
 
3
18.2.12Fersmite
(Ca,Y)(Nb,Ta,Ti)
 
2
(O,OH)
 
6
18.2.13Aeschynite-(Ce)
(Ce,Ca,Fe,Th)(Ti,Nb)
 
2
(O,OH)
 
6
18.2.14Aeschynite-(Nd)
(Nd,Ce,Ca)(Ti,Nb)
 
2
(O,OH)
 
6
18.2.15Aeschynite-(Y)
(Y,Ca,Fe,Th)(Ti,Nb)
 
2
(O,OH)
 
6
18.2.16Nioboaeschynite-(Ce)
(Ce,Ca,Th)(Nb,Ti)
 
2
(O,OH)
 
6
18.2.17Nioboaeschynite-(Nd)
(Nd,Ce,Ca,Th)(Nb,Ti,Fe,Ta)
 
2
(O,OH)
 
6
18.2.19Vigezzite
(Ca,Ce)(Nb,Ti)
 
2
O
 
6
18.2.20Murataite-(Y)
(Y,Na)
 
6
Zn(Zn,Fe
3+
 
)
 
4
(Ti,Nb,Na)
 
12
O
 
29
(O,F,OH)
 
10
F
 
4

Other Names for Tantalaeschynite-(Y)

Other Languages:
German:Tantalaeschynit-(Y)

Other Information

Health Warning: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)

Reference List:

- +
Mineralogical Magazine (1974): 39: 571-576.

American Mineralogist (1974): 59: 1331.

Internet Links for Tantalaeschynite-(Y)

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    • Localities for Tantalaeschynite-(Y)

    The 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.
    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Brazil
     
    • 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)
      • Strzegom-Sobótka Massif
        • Jawor District
    		SZEŁĘG E., CIURLA A., 2004: Preliminary data on Nb-Ta oxides in pegmatites
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