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Titanomaghemite

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Formula:
(Ti4+0.50.5)Fe2O4
Crystal System:
Isometric
Name:
In allusion to its titanium content and relationship to Maghemite.
Occurs as inclusions in hematite in sea-floor basalt (Mid-Atlantic Ridge).


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Classification of TitanomaghemiteHide

Approved
Notes:
Redefined by the IMA
Approval History:
Grandfathered (first described prior to 1959).
Marked as a questionable mineral in IMA list of Minerals as Fe(Fe,Ti)2O4.
2018: Redefined by IMA as (Ti4+0.50.5)Fe2O4 (Bosi et al. 2019)
4.BB.15

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
B : Metal: Oxygen = 3:4 and similar
B : With only medium-sized cations

Pronounciation of TitanomaghemiteHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Chemical Properties of TitanomaghemiteHide

Formula:
(Ti4+0.50.5)Fe2O4
IMA Formula:
(Ti0.50.5)Fe3+2O4

Crystallography of TitanomaghemiteHide

Crystal System:
Isometric
Class (H-M):
4 3 2 - Gyroidal
Space Group:
P43 3 2

Type Occurrence of TitanomaghemiteHide

Place of Conservation of Type Material:
Natural History Museum, London, UK, specimen BM1929,1687, is considered as the neotype (Bosi et al. 2019)

Other Language Names for TitanomaghemiteHide

Relationship of Titanomaghemite to other SpeciesHide

Other Members of this group:
ChromiteFe2+Cr3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
Cochromite(Co,Ni,Fe)(Cr,Al)2O4Iso. m3m (4/m 3 2/m) : Fd3m
CoulsoniteFe2+V3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
CuprospinelCu2+Fe3+2O4Iso.
DellagiustaiteV2+Al2O4Iso. m3m (4/m 3 2/m) : Fd3m
Deltalumite(Al0.670.33)Al2O4Tet. 4 2m : P4m2
FrankliniteZn2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
GahniteZnAl2O4Iso. m3m (4/m 3 2/m) : Fd3m
GalaxiteMn2+Al2O4Iso. m3m (4/m 3 2/m) : Fd3m
GuiteCo2+Co3+2O4Iso.
HausmanniteMn2+Mn3+2O4Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
HercyniteFe2+Al2O4Iso. m3m (4/m 3 2/m) : Fd3m
HetaeroliteZnMn2O4Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
JacobsiteMn2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
Maghemite(Fe3+0.670.33)Fe3+2O4Iso. 4 3 2 : P41 3 2
MagnesiochromiteMgCr2O4Iso. m3m (4/m 3 2/m) : Fd3m
MagnesiocoulsoniteMgV2O4Iso.
MagnesioferriteMgFe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
MagnetiteFe2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
ManganochromiteMn2+Cr2O4Iso. m3m (4/m 3 2/m) : Fd3m
Nichromite(Ni,Co,Fe)(Cr,Fe,Al)2O4Iso. m3m (4/m 3 2/m) : Fd3m
SpinelMgAl2O4Iso. m3m (4/m 3 2/m) : Fd3m
ThermaerogeniteCuAl2O4Iso. m3m (4/m 3 2/m) : Fd3m
TrevoriteNi2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
VuorelaineniteMn2+V3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
ZincochromiteZnCr2O4Iso.

Related Minerals - Nickel-Strunz GroupingHide

4.BB.ChenmingiteFeCr2O4Orth. mmm (2/m 2/m 2/m) : Pnma
4.BB.ThermaerogeniteCuAl2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05ChromiteFe2+Cr3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05Cochromite(Co,Ni,Fe)(Cr,Al)2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05CoulsoniteFe2+V3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05CuprospinelCu2+Fe3+2O4Iso.
4.BB.05Filipstadite(Fe3+0.5Sb5+0.5)Mn2O4Iso.
4.BB.05FrankliniteZn2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05GahniteZnAl2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05GalaxiteMn2+Al2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05HercyniteFe2+Al2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05JacobsiteMn2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05ManganochromiteMn2+Cr2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05MagnesiocoulsoniteMgV2O4Iso.
4.BB.05MagnesiochromiteMgCr2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05MagnesioferriteMgFe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05MagnetiteFe2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05Nichromite(Ni,Co,Fe)(Cr,Fe,Al)2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05Qandilite(Mg,Fe3+)2(Ti,Fe3+,Al)O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05SpinelMgAl2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05TrevoriteNi2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05UlvöspinelTiFe2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05VuorelaineniteMn2+V3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05ZincochromiteZnCr2O4Iso.
4.BB.10HausmanniteMn2+Mn3+2O4Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
4.BB.10HetaeroliteZnMn2O4Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
4.BB.10HydrohetaeroliteZnMn2O4 · H2OTet. 4/mmm (4/m 2/m 2/m) : I41/amd
4.BB.10Jacobsite-QT(Mn2+)M(Fe3+2)O4Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
4.BB.15Maghemite(Fe3+0.670.33)Fe3+2O4Iso. 4 3 2 : P41 3 2
4.BB.20Tegengrenite(Mn3+0.5Sb5+0.5)Mg2O4Trig.
4.BB.25XieiteFe2+Cr2O4Orth. mmm (2/m 2/m 2/m)

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 TitanomaghemiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Mineralogical Magazine 31 (1957), 624.
Economic Geology 54 (1959), 698.
Collyer, S., Grimes, N.W., Vaughan, D.J., and Longworth, G. (1988) Studies of the crystal structure and crystal chemistry of titanomaghemite. American Mineralogist: 73: 153-160.
Mineralogical Magazine 53 (1989), 299.
Bosi, F., Biagioni, C. & Pasero, M.(2019) Nomenclature and classification of the spinel supergroup. European Journal of Mineralogy. 31:183-192

Internet Links for TitanomaghemiteHide

Localities for TitanomaghemiteHide

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.
Atlantic Ocean
 
Bernard, Jan H. & Jaroslav Hyršl (2004), Minerals and their Localities, Granit, Prague: 608.
India
 
  • Andhra Pradesh
    • Prakasam District
Canadian Mineralogist (1965) 8:334-338
Poland
 
  • Silesian Voivodeship
    • Cieszyn Co.
      • Cieszyn
Harańczyk C., Mahmood A. & Narębski W. 1971: Titanomaghemite in theralitic teschenite from Pastwiska near Cieszyn (Polish Carpathians). Bull. Acad. Pol. Sc., 19, 4, 223-231.
Sierra Leone
 
  • Eastern Province
    • Kono District
Haggerty, S. E., Hargraves, R. B., & Tompkins, L. A. (1990). Oxide mineralogy and magnetic properties of the Koidu kimberlite complex, Sierra Leone, west Africa. Geophysical Journal International, 100(2), 275-283.
South Africa (TL)
 
  • Gauteng
    • Pretoria District (Tshwane District)
American Mineralogist (1988): 73: 153-160; Mineralogical Magazine 53 (1989), 299
 
Mineral and/or Locality  
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