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Bismutotantalite

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Formula:
BiTaO4
System:
Orthorhombic
Colour:
Light brown to ...
Lustre:
Sub-Metallic
Hardness:
5 - 5½
Name:
In allusion to the composition, containing bismuth and its relationship to tantalite.
This page provides mineralogical data about Bismutotantalite.


Classification of Bismutotantalite

Approved, 'Grandfathered' (first described prior to 1959)
4.DE.30

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
E : With medium-sized cations; with various polyhedra
8.1.6.3

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
1 : ABO4
18.1.34

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

Physical Properties of Bismutotantalite

Sub-Metallic
Colour:
Light brown to pitch-black; light smoke-grey to colourless in transmitted light
Streak:
Yellow, yellow-brown to black
Hardness (Mohs):
5 - 5½
Cleavage:
Distinct/Good
On {010}, distinct on {101} and {100}.
Fracture:
Sub-Conchoidal
Density:
8.15 - 8.89 g/cm3 (Measured)    8.9 g/cm3 (Calculated)

Optical Data of Bismutotantalite

Type:
Biaxial (+)
RI values:
nα = 2.388 - 2.395 nβ = 2.403 - 2.408 nγ = 2.426 - 2.428
2V:
Measured: 80° , Calculated: 78°
Max Birefringence:
δ = 0.038
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r < v
Comments:
The mineral is isotropic when metamict

Chemical Properties of Bismutotantalite

IMA Formula:
BiTaO4
Elements listed in formula:
Analytical Data:
Analyses of material from the type locality (1), and from Acari, Brazil (2)
         (1)      (2)

Nb2O5   (6.63)   (1.26)
Ta2O5  (40.12)  (46.45)
SiO2             (0.16)
Fe2O3   (0.11)   (0.94)
Bi2O3  (52.26)  (48.98)
Sb2O3   (0.04)   (1.76)
ZnO              (0.38)
MnO     (0.12)   (0.11)
LOI     (0.33)   (0.62) - loss on incineration

sum     99.61   100.66 wt.-%
Common Impurities:
Fe,Mn,Sb,Si,Zn

Crystallography of Bismutotantalite

Crystal System:
Orthorhombic
Cell Parameters:
a = 4.99 Å, b = 11.85 Å, c = 5.68 Å
Ratio:
a:b:c = 0.421 : 1 : 0.479
Unit Cell Volume:
V 335.87 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Stout crystals, prismatic on [001], to 10 cm; commonly irregular or misshapen; as stream-rounded pebbles in placers.
X-Ray Powder Diffraction Data:
d-spacingIntensity
3.148 (10)
2.945 (6)
3.555 (3)
1.735 (3)
1.270 (3)
2.819 (2)
2.743 (2)
Comments:
Recorded on material from Acari, Brazil

Occurrences of Bismutotantalite

Type Occurrence of Bismutotantalite

Place of Conservation of Type Material:
The Natural History Museum, London, England (No. 1929,160)
National Museum of Natural History, Washington, D.C., USA (No. 96044)
Geological Setting of Type Material:
In granite pegmatite
Associated Minerals at Type Locality:

Relationship of Bismutotantalite to other Species

Other Members of Group:
BismutocolumbiteBi(Nb,Ta)O4
CervantiteSb3+Sb5+O4
ClinocervantiteSb3+Sb5+O4
StibiocolumbiteSb(Nb,Ta)O4
StibiotantaliteSb(Ta,Nb)O4
4.DE.05DowneyiteSeO2
4.DE.10KoragoiteMn22+Mn3+Nb2(Nb,Ta)3W2O20
4.DE.15KoechliniteBi2MoO6
4.DE.15RusselliteBi2WO6
4.DE.15TungstibiteSb2WO6
4.DE.20TelluriteTeO2
4.DE.25ParatelluriteTeO2
4.DE.30BismutocolumbiteBiNbO4
4.DE.30CervantiteSb3+Sb5+O4
4.DE.30StibiotantaliteSb3+TaO4
4.DE.30StibiocolumbiteSbNbO4
4.DE.30ClinocervantiteSb3+Sb5+O4
4.DE.35BaddeleyiteZrO2
18.1.1LithiotantiteLiTa3O8
18.1.2LueshiteNaNbO3
18.1.3NatroniobiteNaNbO3
18.1.4FranconiteNaNb2O5(OH) · 3H2O
18.1.5NatrotantiteNa2Ta4O11
18.1.6IrtyshiteNa2Ta4O11
18.1.7Rankamaite(Na,K,Pb)(Ta,Nb,Al)4(O,OH)10
18.1.8Hydropyrochlore(H2O,◻)2Nb2(O,OH)6(H2O)
18.1.9CalciotantiteCaTa4O11
18.1.10RynersoniteCaTa2O6
18.1.11Microlite Group(Ca,Na)2Ta2(O,OH,F)7
18.1.12BelyankiniteCa1-2(Ti,Zr,Nb)5O12 · 9H2O
18.1.13LatrappiteCa2NbFe3+O6
18.1.14HochelagaiteCaNb4O11 · 8H2O
18.1.15Bariomicrolite (of Hogarth 1977)
18.1.16ParabariomicroliteBaTa4O10(OH)2 · 2H2O
18.1.17Bariopyrochlore (of Hogarth 1977)A2Nb2(O,OH)6Z
18.1.18AlumotantiteAlTaO4
18.1.19SimpsoniteAl4Ta3O13(OH)
18.1.20SosedkoiteK5Al2Ta22O60
18.1.21ThoreauliteSn2+Ta2O6
18.1.22Stannomicrolite (of Hogarth 1977)
18.1.23FoorditeSn2+Nb2O6
18.1.24ChangbaiitePbNb2O6
18.1.25Plumbopyrochlore (of Skorobogatova et al.)A2Nb2(O,OH)6Z
18.1.26Plumbomicrolite (of Hogarth 1977)
18.1.27StibiocolumbiteSbNbO4
18.1.28StibiotantaliteSb3+TaO4
18.1.29Natrobistantite
18.1.30CesplumtantiteCs2Pb3Ta8O24
18.1.31Stibiomicrolite (of Groat et al.)
18.1.32Cesstibtantite
18.1.35Bismutomicrolite (of Hogarth 1977)
18.1.36Tantalite-(Mn)Mn2+Ta2O6
18.1.37GerasimovskiteMn2+(Ti,Nb)5O12 · 9H2O
18.1.38Tapiolite-(Mn)Mn2+Ta2O6
18.1.39Columbite-(Mn)Mn2+Nb2O6
18.1.40WodginiteMn2+Sn4+Ta2O8
18.1.41Ixiolite(Ta,Mn,Nb)O2
18.1.42Columbite-(Fe)Fe2+Nb2O6
18.1.43Tantalite-(Fe)Fe2+Ta2O6
18.1.44Columbite
18.1.45Tantalite(Mn,Fe)(Ta,Nb)2O6
18.1.46Tapiolite(Fe,Mn)(Ta,Nb)2O6
18.1.47Tapiolite-(Fe)Fe2+Ta2O6
18.1.48Columbite-(Mg)MgNb2O6
18.1.50Strüverite(Ti,Ta,Fe)O2
18.1.51 Staringite(Fe,Mn)x(Ta,Nb)2xSn6-3xO12

Other Names for Bismutotantalite

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.

References for Bismutotantalite

Reference List:
Wayland and Spencer (1929), Mineralogical Magaizne: 22: 185.

American Mineralogist (1929), 14, 312.

American Mineralogist (1930), 15, 201.

Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 769-770.

Hurlbut, C. S., Jr. (1957): Bismutotantalite from Brazil. American Mineralogist 42, 178-183.

Vlasov, K. A., Ed. (1966): Mineralogy of rare elements, Vol. 2, 442-445.

von Knorring, O. and Fadipe, A. (1981): On the mineralogy and geochemistry of niobium and tantalum in some granite pegmatites and alkali granites of Africa. Bull. Minéral. 104, 496-507.

Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 65.

Canadian Mineralogist (2001), 39, 103-110.

Internet Links for Bismutotantalite

mindat.org URL:
https://www.mindat.org/min-663.html
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Localities for Bismutotantalite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
Argentina
 
  • Salta
    • La Poma department
      • Nevados de Palermo
        • El Quemado district
Galliski et al. (2001) Bismutotantalite from northwestern Argentina: description and crystal structure. Canadian Mineralogist Vol. 39, pp. 103-110.
Australia
 
  • Western Australia
    • Coolgardie Shire
      • Coolgardie
Grguric, B. A. & Downes, P. J. (2008): Pegmatite minerals from the Barabara mine, Coolgardie, Western Australia. Australian J. of Mineralogy 14, 55-60.
Brazil
 
  • Paraíba
    • Borborema mineral province
      • Junco do Seridó
Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 65
      • Picuí
Beurlen, H., Da Silva, M.R.R., Thomas, R., Soares, D.R., and Olivier, P. (2008): Mineralium Deposita 43, 207-228.
  • Rio Grande do Norte
    • Borborema mineral province
Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 65
Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 65
Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 65
Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 65
Canada
 
  • British Columbia
    • Revelstoke Mining Division
      • Revelstoke
DIXON,A., CEMPIREK, J. & GROAT, L.A. (2014) Mineralogy and geochemistry of pegmatites on Mount Begbie, British Columbia. Canadian Mineralogist 52, 129-164.; Dixon, A. (2014, October). Mount Begbie Pegmatite Group, British Columbia, Canada–evolution from Barren to Complex Rare-element Pegmatites. In 2014 GSA Annual Meeting in Vancouver, British Columbia.
China
 
  • Henan Province
    • Sanmenxia Prefecture
      • Lushi Co.
        • Guanpo
          • Guanpo pegmatite field
Fan G., Li G., Shen G., Xu J., Dai J. (2013): Luanshiweiite: A New Member of Lepidolite Series. Acta Mineralogica Sinica, 33, 713-721.
  • Xinjiang Autonomous Region
    • Yili Hasake Autonomous Prefecture (Ili Kazakh Autonomous Prefecture)
      • Aletai Prefecture (Altay Prefecture)
        • Fuyun Co. (Koktokay Co.)
Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 65
Italy
 
  • Lombardy
    • Brescia Province
      • Camonica Valley
        • Adamello-Brenta Natural Park
          • Adamello Massif
            • Mt. Foppa
Pezzotta, Federico and Guastoni, Alessandro, The New Discovery of a LCT Pegmatite in the Adamello Massif, Central Southern Alps, Italy; Museo Civico di Storia Naturale, Milan, Italy.
Japan
 
  • Kyushu Region
    • Fukuoka Prefecture
Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 65; Uehara, S., et al. (2014) Minerals from Kyushu and Yamaguchi. (Fukuoka Mineral Club, 355 pages)
Madagascar
 
Tony Nichisher
  • Mahajanga Province (Majunga)
    • Betsiboka Region
      • Tsaratanàna District
        • Tsaratanàna Pegmatite Field
Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 65; Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Geologique A. 1871
Mozambique
 
  • Zambezia Province
    • Alto Ligonha District
Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 65
Russia
 
  • Urals Region
    • Middle Urals
      • Sverdlovskaya Oblast'
        • Rezh District
          • Lipovka pegmatite field
Igor.V. Pekov, Lyudmila R. Memetova (2008) Minerals of the Lipovka Granite Pegmatites, Central Urals, Russia. Mineralogical Almanac 13:6-45
Uganda (TL)
 
  • Central Region
    • Wakiso District
      • Busiiro Co. (Bushiro Co.)
Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 65
Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 63
Uganda Geological Survey Bull. 4
USA
 
  • California
    • San Diego Co.
      • Pala District
        • Pala
          • Tourmaline Queen Mountain (Pala Mtn; Queen Mtn)
San Diego Mining Company (2009)
  • Connecticut
    • Middlesex Co.
      • Haddam
Eric Briggs collection
  • New Mexico
    • Taos Co.
      • Picuris District
Minerals of New Mexico 3rd ed.; Jahns, R. H. and Ewing, R. C. (1977): The Harding mine, Taos County, New Mexico. Mineralogical Record, 8 (2): 115-126.
Zimbabwe
 
  • Manicaland
Gallagher, M.J. (1967): Phosphates and other minerals in pegmatites of Rhodesia and Uganda. Mineralogical Magazine. 36, 50-59
Mineral and/or Locality  
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