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Natrotantite

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Formula:
Na2Ta4O11
Colour:
Colorless with slight yellow tint
Lustre:
Adamantine
Hardness:
7
Crystal System:
Monoclinic
Name:
For the chemical composition.
Not to be confused with natrotitanite.


Hide all sections | Show all sections

Classification of NatrotantiteHide

Approved
First Published:
1981
4.DJ.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
J : With large (+- medium-sized) cations; polyhedral frameworks
8.6.2.2

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
6 : (AB)6O11·nH2O
18.1.5

18 : Niobates and Tantalates
1 : Niobates and tantalates containing neither rare earths nor U

Physical Properties of NatrotantiteHide

Adamantine
Transparency:
Transparent
Colour:
Colorless with slight yellow tint
Streak:
White
Hardness:
Hardness:
VHN40=1270 kg/mm2 - Vickers
Cleavage:
None Observed
Fracture:
Irregular/Uneven

Optical Data of NatrotantiteHide

Type:
Uniaxial
Type:
Anisotropic
Anisotropism:
Strong
Reflectivity:
486nmR1=15.0%R2= 13.6%
589nmR1=12.4%R2= 11.8%
656nmR1=12.0%R2= 12.0%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 15.0%.
R1 shown in black, R2 shown in red

Chemical Properties of NatrotantiteHide

Formula:
Na2Ta4O11

Crystallography of NatrotantiteHide

Crystal System:
Monoclinic
Cell Parameters:
a = 10.81 Å, b = 6.23 Å, c = 12.78 Å
Ratio:
a:b:c = 1.735 : 1 : 2.051
Unit Cell V:
0.00 ų (Calculated from Unit Cell)
Morphology:
Intergrown with microlite, rimming simpsonite

Type Occurrence of NatrotantiteHide

Place of Conservation of Type Material:
Mineralogical Museum, Geological Institute, Kola Branch, Acad. Sci. USSR, Apatite.
Geological Setting of Type Material:
Granite pegmatite
Associated Minerals at Type Locality:
Reference:
Voloshin, A.V., Men’shikov, Y.P., Pakhomovskii, Y.A. (1981) Alumotantite and natrotantite, new tantalum minerals in granitic pegmatites. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva: 110(3): 338-345.

Synonyms of NatrotantiteHide

Other Language Names for NatrotantiteHide

Relationship of Natrotantite to other SpeciesHide

Other Members of this group:
CalciotantiteCaTa4O11Hex.
IrtyshiteNa2(Ta,Nb)4O11Hex.

Related Minerals - Nickel-Strunz GroupingHide

4.DJ.05CalciotantiteCaTa4O11Hex.
4.DJ.05IrtyshiteNa2(Ta,Nb)4O11Hex.

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

8.6.2.1CalciotantiteCaTa4O11Hex.
8.6.2.3IrtyshiteNa2(Ta,Nb)4O11Hex.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

18.1.1LithiotantiteLiTa3O8Mon.
18.1.2LueshiteNaNbO3Orth. mmm (2/m 2/m 2/m)
18.1.3NatroniobiteNaNbO3Mon.
18.1.4FranconiteNa(Nb2O5)(OH) · 3H2OMon.
18.1.6IrtyshiteNa2(Ta,Nb)4O11Hex.
18.1.7Rankamaite(Na,K)3(Ta,Nb,Al)11(O,OH)31Orth. mmm (2/m 2/m 2/m) : Cmmm
18.1.8Hydropyrochlore(H2O,□)2Nb2(O,OH)6(H2O)Iso. m3m (4/m 3 2/m) : Fd3m
18.1.9CalciotantiteCaTa4O11Hex.
18.1.10RynersoniteCaTa2O6Orth. mmm (2/m 2/m 2/m)
18.1.11Microlite GroupA2-mTa2X6-wZ-nIso. m3m (4/m 3 2/m) : Fd3m
18.1.12BelyankiniteCa1-2(Ti,Nb)5O12 · 9H2O (?)Amor.
18.1.13LatrappiteCa2NbFe3+O6Orth. mmm (2/m 2/m 2/m) : Pnma
18.1.14Hochelagaite(Ca,Na,Sr)(Nb,Ti,Si,Al)4O11 · 8H2OMon.
18.1.15Bariomicrolite (of Hogarth 1977)Iso. m3m (4/m 3 2/m) : Fd3m
18.1.16ParabariomicroliteBaTa4O10(OH)2 · 2H2OTrig.
18.1.17Bariopyrochlore (of Hogarth 1977)A2Nb2(O,OH)6ZIso. m3m (4/m 3 2/m) : Fd3m
18.1.18AlumotantiteAlTaO4Orth. mmm (2/m 2/m 2/m) : Pbcn
18.1.19SimpsoniteAl4(Ta,Nb)3O13(OH,F)Trig. 3 : P3
18.1.20Sosedkoite(K,Na)5Al2(Ta,Nb)22O60Orth.
18.1.21Thoreaulite(Sn2+,Pb)(Ta,Nb)2O6Mon.
18.1.22Stannomicrolite (of Hogarth 1977)
18.1.23FoorditeSn2+(Nb,Ta)2O6Mon. 2/m : B2/b
18.1.24ChangbaiitePbNb2O6Trig.
18.1.25Plumbopyrochlore (of Skorobogatova et al.)A2Nb2(O,OH)6Z
18.1.26Plumbomicrolite (of Hogarth 1977)
18.1.27StibiocolumbiteSb(Nb,Ta)O4Orth. mm2
18.1.28StibiotantaliteSb(Ta,Nb)O4Orth. mm2
18.1.29NatrobistantiteIso.
18.1.30Cesplumtantite(Cs,Na)2(Pb,Sb3+)3Ta8O24Tet.
18.1.31Stibiomicrolite (of Groat et al.)
18.1.32Cesstibtantite
18.1.34BismutotantaliteBi(Ta,Nb)O4Orth.
18.1.35Bismutomicrolite (of Hogarth 1977)Iso. m3m (4/m 3 2/m) : Fd3m
18.1.36Tantalite-(Mn)Mn2+Ta2O6Orth. mmm (2/m 2/m 2/m) : Pbcn
18.1.37Gerasimovskite(Mn,Ca)(Nb,Ti)5O12 · 9H2OAmor.
18.1.38Tapiolite-(Mn)(Mn,Fe)(Ta,Nb)2O6Tet. 4/mmm (4/m 2/m 2/m) : P42/mnm
18.1.39Columbite-(Mn)Mn2+Nb2O6Orth. mmm (2/m 2/m 2/m) : Pbcn
18.1.40WodginiteMn2+Sn4+Ta2O8Mon.
18.1.41Ixiolite(Ta,Nb,Sn,Fe,Mn)4O8Orth.
18.1.42Columbite-(Fe)Fe2+Nb2O6Orth. mmm (2/m 2/m 2/m) : Pbcn
18.1.43Tantalite-(Fe)Fe2+Ta2O6Orth. mmm (2/m 2/m 2/m) : Pbcn
18.1.44ColumbiteOrth. mmm (2/m 2/m 2/m) : Pbcn
18.1.45Tantalite(Mn,Fe)(Ta,Nb)2O6
18.1.46Tapiolite(Fe,Mn)(Ta,Nb)2O6Tet. 4/mmm (4/m 2/m 2/m)
18.1.47Tapiolite-(Fe)(Fe,Mn)(Ta,Nb)2O6Tet. 4/mmm (4/m 2/m 2/m) : P42/mnm
18.1.48Columbite-(Mg)(Mg,Fe,Mn)(Nb,Ta)2O6Orth.
18.1.50Strüverite(Ti,Ta,Fe)O2
18.1.51 Staringite(Fe,Mn)x(Ta,Nb)2xSn6-3xO12

Fluorescence of NatrotantiteHide

Other InformationHide

Notes:
Strong yellow green catholuminescence.
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 NatrotantiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Voloshin, A.V., Men’shikov, Y.P., Pakhomovskii, Y.A. (1981) Alumotantite and natrotantite, new tantalum minerals in granitic pegmatites. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva: 110(3): 338-345.
Fleischer, M., Burns, R.G., Cabri, L.J., Francis, C.A., Pabst, A. (1982) New mineral names. American Mineralogist: 67: 413-418.
Ercit, T.S., Hawthorne, F.C., Černý, P. (1985) The crystal structure of synthetic natrotantite. Bulletin de Minéralogie: 108: 541-549.
Belakovskiy, D., Welch, M.D., Cámara, F., Diego Gatta, G., Tait, K.T. (2012) New mineral names. American Mineralogist: 97: 1523-1530.

Internet Links for NatrotantiteHide

Localities for NatrotantiteHide

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
 
  • Paraíba
    • Borborema mineral province
      • Junco do Seridó
Pereira das Neves, P. S, and Atencio, D. (2018) Enciclopedia dos Minerais do Brasil v. 6: Tectossilicatos, p. 279, Ed. da Ulbra. Canaos, Brazil.
  • Rio Grande do Norte
    • Borborema mineral province
      • Equador
http://rruff.geo.arizona.edu/doclib/hom/parabariomicrolite.pdf.; Canadian Mineralogist (1986): 24: 655-663.
Portugal
 
  • Vila Real
    • Chaves
      • Vidago
Pedro Alves collection. Characterized by p-XRD and EPMA
Russia (TL)
 
  • Murmansk Oblast
    • Voron'i Tundry
J. W. Anthony et al.: Handbook of Mineralogy, Vol. III (1997); Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
 
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