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Columbite-(Fe)

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Formula:
FeNb2O6
System:
Orthorhombic
Colour:
Black to brownish black
Hardness:
6
Member of:
Name:
Named in 1801 by Charles Hatchett (1765-1847) from a specimen collected in the mid-17th century in a place called Nautneague (now regarded as Haddam, Connecticut, USA). The specimen was from the mineral collection of John Winthrop (1606–1676), governor of Connecticut and was given to Hans Sloane by John Winthrop (1681–1747) who was the grandson of the governor with the same name. From the type specimen, Hatchett named the new element columbium (now called niobium). The current species, columbite-(Fe) retains the old root name and has the suffix -(Fe) to indicate the dominance of iron in the species. Columbite was the second species named from the USA, after celestine (q.v.)
Columbite-(Fe)-Tantalite-(Fe) Series and the Columbite-(Fe)-Columbite-(Mn) Series.
Formerly known as columbite and ferrocolumbite.

Compare also ixiolite.


Classification of Columbite-(Fe)

Approved, 'Grandfathered' (first described prior to 1959)
4.DB.35

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
B : With medium-sized cations; chains of edge-sharing octahedra
8.3.2.2

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
3 : AB2O6
18.1.42

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

Occurrences of Columbite-(Fe)

Type Occurrence of Columbite-(Fe)

Physical Properties of Columbite-(Fe)

Vitreous, Sub-Metallic
Diaphaneity (Transparency):
Opaque
Comment:
Commonly tarnishes to iridescent.
Colour:
Black to brownish black
Comment:
Reddish brown in transmitted light.
Streak:
Black to dark brown.
Hardness (Mohs):
6
Hardness (Vickers):
VHN100=652 - 739 kg/mm2
Tenacity:
Brittle
Cleavage:
Distinct/Good
Distinct on {100}, less distinct on {010}
Fracture:
Irregular/Uneven, Sub-Conchoidal
Density:
5.2 - 6.65 g/cm3 (Measured)    5.43 g/cm3 (Calculated)

Crystallography of Columbite-(Fe)

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pbcn
Cell Parameters:
a = 14.266(1) Å, b = 5.7321(4) Å, c = 5.0503(4) Å
Ratio:
a:b:c = 2.489 : 1 : 0.881
Unit Cell Volume:
V 412.98 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Short prismatic or equant also flat tabular
Twinning:
Common on {021} and {023}
Comment:
Strong subcell has a/3.
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Columbite-(Fe)

Type:
Biaxial (-)
Dispersion:
relatively strong r < v
Colour in reflected light:
Grayish white with brownish tint
Internal Reflections:
Reddish

Chemical Properties of Columbite-(Fe)

Formula:
FeNb2O6
All elements listed in formula:

Relationship of Columbite-(Fe) to other Species

Series:
Forms a series with Columbite-(Mn) (see here)
Forms a series with Tantalite-(Fe) (see here)
Member of:
Other Members of Group:
Columbite-(Mg)(Mg,Fe,Mn)(Nb,Ta)2O6
Columbite-(Mn)(Mn,Fe)(Nb,Ta)2O6
Qitianlingite(Fe,Mn)2(Nb,Ta)2WO10
Tantalite-(Fe)FeTa2O6
Tantalite-(Mg)(Mg,Fe2+)(Ta,Nb)2O6
Tantalite-(Mn)MnTa2O6
4.DB.05ArgutiteGeO2
4.DB.05CassiteriteSnO2
4.DB.05PlattneritePbO2
4.DB.05PyrolusiteMnO2
4.DB.05RutileTiO2
4.DB.05TripuhyiteFe3+Sb5+O4
4.DB.05TugarinoviteMoO2
4.DB.05Varlamoffite(Sn,Fe)(O,OH)2
4.DB.10ByströmiteMgSb2O6
4.DB.10Tapiolite-(Fe)(Fe,Mn)(Ta,Nb)2O6
4.DB.10Tapiolite-(Mn)(Mn,Fe)(Ta,Nb)2O6
4.DB.10OrdoñeziteZnSb2O6
4.DB.15bAkhtenskiteε-Mn4+O2
4.DB.15cNsutite(Mn4+,Mn2+)(O,OH)2
4.DB.15aParamontroseiteV4+O2
4.DB.15aRamsdelliteMn4+O2
4.DB.20Scrutinyiteα-PbO2
4.DB.25IshikawaiteU4+Fe2+Nb2O8
4.DB.25Ixiolite(Ta,Nb,Sn,Fe,Mn)4O8
4.DB.25Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
4.DB.25SrilankiteZrTi2O6
4.DB.25Yttrocolumbite-(Y)Y(U4+,Fe2+)Nb2O8
4.DB.25Calciosamarskite(Ca,Fe3+,Y)2(Nb,Ta,Ti)2O8
4.DB.25Samarskite-(Yb)(Yb,Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
4.DB.30FerberiteFeWO4
4.DB.30HübneriteMnWO4
4.DB.30Sanmartinite(Zn,Fe)WO4
4.DB.30KrasnoselskiteCoWO4
4.DB.30HeftetjerniteScTaO4
4.DB.30HuanzalaiteMgWO4
4.DB.35Tantalite-(Fe)FeTa2O6
4.DB.35Columbite-(Mn)(Mn,Fe)(Nb,Ta)2O6
4.DB.35Tantalite-(Mn)MnTa2O6
4.DB.35Columbite-(Mg)(Mg,Fe,Mn)(Nb,Ta)2O6
4.DB.35Qitianlingite(Fe,Mn)2(Nb,Ta)2WO10
4.DB.35Magnocolumbite(Mg,Fe,Mn)(Nb,Ta)2O6
4.DB.35Tantalite-(Mg)(Mg,Fe2+)(Ta,Nb)2O6
4.DB.40FerrowodginiteFe2+Sn4+Ta2O8
4.DB.40LithiotantiteLiTa3O8
4.DB.40LithiowodginiteLiTa3O8
4.DB.40TitanowodginiteMn2+TiTa2O8
4.DB.40WodginiteMn2+Sn4+Ta2O8
4.DB.40FerrotitanowodginiteFe2+TiTa2O8
4.DB.40WolframowodginiteMn(Mn,Sn,Fe,Ta)(W,Ta,Nb)2O8
4.DB.45TivaniteV3+TiO3(OH)
4.DB.50Carmichaelite(Ti,Cr,Fe)[O2-x(OH)x]
4.DB.55AlumotantiteAlTaO4
4.DB.60Biehlite((Sb,As)O)2[MoO4]
18.1.1LithiotantiteLiTa3O8
18.1.2LueshiteNaNbO3
18.1.3NatroniobiteNaNbO3
18.1.4FranconiteNa(Nb2O5)(OH) · 3H2O
18.1.5NatrotantiteNa2Ta4O11
18.1.6IrtyshiteNa2(Ta,Nb)4O11
18.1.7Rankamaite(Na,K)3(Ta,Nb,Al)11(O,OH)31
18.1.8Hydropyrochlore(H2O,□)2Nb2(O,OH)6(H2O)
18.1.9CalciotantiteCaTa4O11
18.1.10RynersoniteCaTa2O6
18.1.11Microlite Group
18.1.12BelyankiniteCa1-2(Ti,Nb)5O12 · 9H2O (?)
18.1.13LatrappiteCa2NbFe3+O6
18.1.14Hochelagaite(Ca,Na,Sr)(Nb,Ti,Si,Al)4O11 · 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
18.1.19SimpsoniteAl4(Ta,Nb)3O13(OH,F)
18.1.20Sosedkoite(K,Na)5Al2(Ta,Nb)22O60
18.1.21Thoreaulite(Sn2+,Pb)(Ta,Nb)2O6
18.1.22Stannomicrolite (of Hogarth 1977)
18.1.23FoorditeSn2+(Nb,Ta)2O6
18.1.24ChangbaiitePbNb2O6
18.1.25Plumbopyrochlore (of Skorobogatova et al.)A2Nb2(O,OH)6Z
18.1.26Plumbomicrolite (of Hogarth 1977)
18.1.27StibiocolumbiteSb(Nb,Ta)O4
18.1.28StibiotantaliteSb(Ta,Nb)O4
18.1.29Natrobistantite
18.1.30Cesplumtantite(Cs,Na)2(Pb,Sb3+)3Ta8O24
18.1.31Stibiomicrolite (of Groat et al.)
18.1.32Cesstibtantite
18.1.34BismutotantaliteBi(Ta,Nb)O4
18.1.35Bismutomicrolite (of Hogarth 1977)
18.1.36Tantalite-(Mn)MnTa2O6
18.1.37Gerasimovskite(Mn,Ca)(Nb,Ti)5O12 · 9H2O
18.1.38Tapiolite-(Mn)(Mn,Fe)(Ta,Nb)2O6
18.1.39Columbite-(Mn)(Mn,Fe)(Nb,Ta)2O6
18.1.40WodginiteMn2+Sn4+Ta2O8
18.1.41Ixiolite(Ta,Nb,Sn,Fe,Mn)4O8
18.1.43Tantalite-(Fe)FeTa2O6
18.1.44Columbite
18.1.45Tantalite(Fe,Mn)(Ta,Nb)2O6
18.1.46Tapiolite(Fe,Mn)(Ta,Nb)2O6
18.1.47Tapiolite-(Fe)(Fe,Mn)(Ta,Nb)2O6
18.1.48Columbite-(Mg)(Mg,Fe,Mn)(Nb,Ta)2O6
18.1.50Strüverite(Ti,Ta,Fe)O2
18.1.51 Staringite(Fe,Mn)x(Ta,Nb)2xSn6-3xO12

Other Names for Columbite-(Fe)

Name in Other Languages:
Simplified Chinese:铌铁矿
Traditional Chinese:鈮鐵礦

Other Information

Magnetism:
Paramagnetic
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Industrial Uses:
Ore source for niobium.

References for Columbite-(Fe)

Reference List:
Hatchett, Charles (1801) ) An Analysis of a Mineral Substance from North America, Containing a Metal Hitherto Unknown, Philosophical Transactions of the Royal Society of London. 92: 49–66.
American Mineralogist: 80: 613-619.
William P. Griffith and Peter J. T. Morris (2003). Charles Hatchett FRS (1765-1847), Chemist and Discoverer of Niobium". Notes and Records of the Royal Society of London. 57 (3): 299.
E. J. Kinast, O. Isnard, J. B. M. da Cunha, M. A. Z. de Vasconcellos and C. A. dos Santos (2011): A new approach for the determination of multiple cation locations and ordering, using the example of natural and heat-treated columbites. Journal of Applied Crystallography, 44, 738-746.

Internet Links for Columbite-(Fe)

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http://www.mindat.org/min-1514.html
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Specimens:
The following Columbite-(Fe) specimens are currently listed for sale on minfind.com.

Localities for Columbite-(Fe)

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.
Mineral and/or Locality  
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