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Chromite

A valid IMA mineral species - grandfathered
This page kindly sponsored by Robert M. Hazen
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About ChromiteHide

Formula:
Fe2+Cr3+2O4
Colour:
Black
Lustre:
Resinous, Greasy, Metallic, Sub-Metallic, Dull
Hardness:
Specific Gravity:
4.5 - 4.8
Crystal System:
Isometric
Name:
Chromite was named in 1845 by Wilhelm Haidinger in allusion to its composition. The species was originally named fer chromate alumine by Louis Nicolas Vauquelin in 1798. Vauquelin was the discoverer of the element chromium.
Polymorph of:
Isostructural with:
Chromite is the most important chromium ore mineral.
It forms a complete solid solution series with many other members of the group, eg. in the Chromite-Hercynite Series, Chromite-Spinel Series, Chromite-Magnetite Series and the Chromite-Magnesiochromite Series. It is the iron analogue of Zincochromite, Cochromite, Manganochromite and Magnesiochromite and the Cr analogue of Hercynite, Coulsonite and Magnetite

It usually contains Mg, ferric iron [Fe(III)], Al and often trace amounts of Ti. "Ferritchromite", i.e. Fe(III) substitutions for Al and Cr, usually in grain rims, may give high total Fe contents and a false chromite identification. Of course, the definition requires dominant Fe(II)>Mg and Cr>Fe(III). (e.g. photo ID: 514894).

"Chromite" is commonly used for any Cr-rich mineral of the spinel group, particularly for the chromite-magnesiochromite series, and much of the mineral referred to as "chromite" in geological and petrological papers and mining statistics is magnesiochromite. The Fe-dominant species - chromite itself - can be FOUND, although uncommonly, in many "chromite" deposits, chromitite (rock name), and other "chromite"-bearing occurrences connected with hyperbasic rocks. As a rule of thumb, a member of the chromite-magnesiochromite series is twice as likely to be a magnesiochromite instead of a chromite. "Chromites" associated with olivine or serpentines, which are Mg-rich rocks, frequently have Mg-rich associated minerals. True chromite is common as inclusions in diamonds from kimberlites (South Africa and Yakutia). Members of the spinel group may be enriched Cr and V in marbles (Slyudyanka), massive sulphide ores (Outokumpu) and also in some types of meteorites. In any case, "chromite" always needs ANALYTICAL CONFIRMATION.
Note: Chromite, that is near end-member, has a higher specific gravity than near end-member magnesiochromite.


Unique IdentifiersHide

Mindat ID:
1036
Long-form identifier:
mindat:1:1:1036:4
GUID
(UUID V4):
7d202627-c431-4cb2-a077-2c1ebe843d1e

IMA Classification of ChromiteHide

Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Fe2+Cr2O4
First published:
1845

Classification of ChromiteHide

4.BB.05

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
7.2.3.3

7 : MULTIPLE OXIDES
2 : AB2X4
7.14.12

7 : Oxides and Hydroxides
14 : Oxides of Cr

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

SymbolSourceReference
ChrIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
ChrKretz (1983)Kretz, R. (1983) Symbols of rock-forming minerals. American Mineralogist, 68, 277–279.
ChrSiivolam & Schmid (2007)Siivolam, J. and Schmid, R. (2007) Recommendations by the IUGS Subcommission on the Systematics of Metamorphic Rocks: List of mineral abbreviations. Web-version 01.02.07. IUGS Commission on the Systematics in Petrology. download
ChrWhitney & Evans (2010)Whitney, D.L. and Evans, B.W. (2010) Abbreviations for names of rock-forming minerals. American Mineralogist, 95, 185–187 doi:10.2138/am.2010.3371
ChrThe Canadian Mineralogist (2019)The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download

Pronunciation of ChromiteHide

Pronunciation:
PlayRecorded byCountry
Jolyon RalphUnited Kingdom

Physical Properties of ChromiteHide

Resinous, Greasy, Metallic, Sub-Metallic, Dull
Transparency:
Translucent, Opaque
Colour:
Black
Streak:
Brown
Hardness:
5½ on Mohs scale
Hardness:
VHN100=1278 - 1456 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
None Observed
Parting:
Parting may develop along {111}
Fracture:
Irregular/Uneven, Hackly, Sub-Conchoidal
Comment:
Broken surfaces frequently have an angular granulated appearance.
Density:
4.5 - 4.8 g/cm3 (Measured)    5.12 g/cm3 (Calculated)

Optical Data of ChromiteHide

Type:
Isotropic
RI values:
n = 2.08 - 2.16
Birefringence:
0.0
Surface Relief:
Very High
Reflectivity:
WavelengthR
400nm13.2%
420nm13.1%
440nm13.0%
460nm12.8%
480nm12.6%
500nm12.4%
520nm12.2%
540nm12.0%
560nm11.9%
580nm11.8%
600nm11.7%
620nm11.7%
640nm11.6%
660nm11.6%
680nm11.6%
700nm11.6%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 13.2%.
Colour in reflected light:
Grey-white with brownish tint.
Internal Reflections:
Brownish red
Pleochroism:
Non-pleochroic

Chemistry of ChromiteHide

Mindat Formula:
Fe2+Cr3+2O4
Common Impurities:
Mg,Mn,Zn,Al,Ti

Crystallography of ChromiteHide

Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Fd3m
Setting:
Fd3m
Cell Parameters:
a = 8.344 Å
Unit Cell V:
580.93 ų (Calculated from Unit Cell)
Z:
8
Morphology:
Octahedral crystals uncommon, modified by {001} at times. Rarely, crystals may show small dodecahedral faces, etc. Usually massive, fine granular to compact.
Twinning:
On {111}

Crystallographic forms of ChromiteHide

Crystal Atlas:
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Chromite no.1 - Goldschmidt (1913-1926)
Chromite no.2 - Goldschmidt (1913-1926)
3d models and HTML5 code kindly provided by www.smorf.nl.

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0004961ChromiteLenaz D, Logvinova A M, Princivalle F, Sobolev N V (2009) Structural parameters of chromite included in diamond and kimberlites from Siberia: A new tool for discriminating ultramafic source American Mineralogist 94 1067-10702009Udachnaya mine, Daldyn kimberlitic field, close to Arctic Circle, Russia0293
0004962ChromiteLenaz D, Logvinova A M, Princivalle F, Sobolev N V (2009) Structural parameters of chromite included in diamond and kimberlites from Siberia: A new tool for discriminating ultramafic source American Mineralogist 94 1067-10702009Udachnaya mine, Daldyn kimberlitic field, close to Arctic Circle, Russia0293
0004963ChromiteLenaz D, Logvinova A M, Princivalle F, Sobolev N V (2009) Structural parameters of chromite included in diamond and kimberlites from Siberia: A new tool for discriminating ultramafic source American Mineralogist 94 1067-10702009Udachnaya mine, Daldyn kimberlitic field, close to Arctic Circle, Russia0293
0004964ChromiteLenaz D, Logvinova A M, Princivalle F, Sobolev N V (2009) Structural parameters of chromite included in diamond and kimberlites from Siberia: A new tool for discriminating ultramafic source American Mineralogist 94 1067-10702009Udachnaya mine, Daldyn kimberlitic field, close to Arctic Circle, Russia0293
0004965ChromiteLenaz D, Logvinova A M, Princivalle F, Sobolev N V (2009) Structural parameters of chromite included in diamond and kimberlites from Siberia: A new tool for discriminating ultramafic source American Mineralogist 94 1067-10702009Internatsionalnaya mine, Malo-Botuobiya kimberlite field, Russia0293
0004966ChromiteLenaz D, Logvinova A M, Princivalle F, Sobolev N V (2009) Structural parameters of chromite included in diamond and kimberlites from Siberia: A new tool for discriminating ultramafic source American Mineralogist 94 1067-10702009Mir mine, Malo-Botuobiya kimberlite field, Russia0293
0004967ChromiteLenaz D, Logvinova A M, Princivalle F, Sobolev N V (2009) Structural parameters of chromite included in diamond and kimberlites from Siberia: A new tool for discriminating ultramafic source American Mineralogist 94 1067-10702009Internatsionalnaya mine, Malo-Botuobiya kimberlite field, Russia0293
0006033ChromiteLenaz D, Princivalle F (2005) The crystal chemistry of detrital chromian spinel from the southeastern Alps and Outer Dinarides: The discrimination of supplies from areas of similar tectonic setting? The Canadian Mineralogist 43 1305-131420050293
0006034ChromiteLenaz D, Princivalle F (2005) The crystal chemistry of detrital chromian spinel from the southeastern Alps and Outer Dinarides: The discrimination of supplies from areas of similar tectonic setting? The Canadian Mineralogist 43 1305-131420050293
0006037ChromiteLenaz D, Princivalle F (2005) The crystal chemistry of detrital chromian spinel from the southeastern Alps and Outer Dinarides: The discrimination of supplies from areas of similar tectonic setting? The Canadian Mineralogist 43 1305-131420050293
0006047ChromiteLenaz D, Princivalle F (2005) The crystal chemistry of detrital chromian spinel from the southeastern Alps and Outer Dinarides: The discrimination of supplies from areas of similar tectonic setting? The Canadian Mineralogist 43 1305-131420050293
0007226ChromiteLenaz D, Braidotti R, Princivalle F, Garuti G, Zaccarini F (2007) Crystal chemistry and structural refinement of chromites from different chromitite layers and xenoliths of the Bushveld complex European Journal of Mineralogy 19 599-6092007Bushveld complex, South Africa0293
0007227ChromiteLenaz D, Braidotti R, Princivalle F, Garuti G, Zaccarini F (2007) Crystal chemistry and structural refinement of chromites from different chromitite layers and xenoliths of the Bushveld complex European Journal of Mineralogy 19 599-6092007Bushveld complex, South Africa0293
0007228ChromiteLenaz D, Braidotti R, Princivalle F, Garuti G, Zaccarini F (2007) Crystal chemistry and structural refinement of chromites from different chromitite layers and xenoliths of the Bushveld complex European Journal of Mineralogy 19 599-6092007Bushveld complex, South Africa0293
0007229ChromiteLenaz D, Braidotti R, Princivalle F, Garuti G, Zaccarini F (2007) Crystal chemistry and structural refinement of chromites from different chromitite layers and xenoliths of the Bushveld complex European Journal of Mineralogy 19 599-6092007Bushveld complex, South Africa0293
0007230ChromiteLenaz D, Braidotti R, Princivalle F, Garuti G, Zaccarini F (2007) Crystal chemistry and structural refinement of chromites from different chromitite layers and xenoliths of the Bushveld complex European Journal of Mineralogy 19 599-6092007Bushveld complex, South Africa0293
0007231ChromiteLenaz D, Braidotti R, Princivalle F, Garuti G, Zaccarini F (2007) Crystal chemistry and structural refinement of chromites from different chromitite layers and xenoliths of the Bushveld complex European Journal of Mineralogy 19 599-6092007Bushveld complex, South Africa0293
0007232ChromiteLenaz D, Braidotti R, Princivalle F, Garuti G, Zaccarini F (2007) Crystal chemistry and structural refinement of chromites from different chromitite layers and xenoliths of the Bushveld complex European Journal of Mineralogy 19 599-6092007Bushveld complex, South Africa0293
0007233ChromiteLenaz D, Braidotti R, Princivalle F, Garuti G, Zaccarini F (2007) Crystal chemistry and structural refinement of chromites from different chromitite layers and xenoliths of the Bushveld complex European Journal of Mineralogy 19 599-6092007Bushveld complex, South Africa0293
0007234ChromiteLenaz D, Braidotti R, Princivalle F, Garuti G, Zaccarini F (2007) Crystal chemistry and structural refinement of chromites from different chromitite layers and xenoliths of the Bushveld complex European Journal of Mineralogy 19 599-6092007Bushveld complex, South Africa0293
0007235ChromiteLenaz D, Braidotti R, Princivalle F, Garuti G, Zaccarini F (2007) Crystal chemistry and structural refinement of chromites from different chromitite layers and xenoliths of the Bushveld complex European Journal of Mineralogy 19 599-6092007Bushveld complex, South Africa0293
0007236ChromiteLenaz D, Braidotti R, Princivalle F, Garuti G, Zaccarini F (2007) Crystal chemistry and structural refinement of chromites from different chromitite layers and xenoliths of the Bushveld complex European Journal of Mineralogy 19 599-6092007Bushveld complex, South Africa0293
0007237ChromiteLenaz D, Braidotti R, Princivalle F, Garuti G, Zaccarini F (2007) Crystal chemistry and structural refinement of chromites from different chromitite layers and xenoliths of the Bushveld complex European Journal of Mineralogy 19 599-6092007Bushveld complex, South Africa0293
0007238ChromiteLenaz D, Braidotti R, Princivalle F, Garuti G, Zaccarini F (2007) Crystal chemistry and structural refinement of chromites from different chromitite layers and xenoliths of the Bushveld complex European Journal of Mineralogy 19 599-6092007Bushveld complex, South Africa0293
0007239ChromiteLenaz D, Braidotti R, Princivalle F, Garuti G, Zaccarini F (2007) Crystal chemistry and structural refinement of chromites from different chromitite layers and xenoliths of the Bushveld complex European Journal of Mineralogy 19 599-6092007Bushveld complex, South Africa0293
0007240ChromiteLenaz D, Braidotti R, Princivalle F, Garuti G, Zaccarini F (2007) Crystal chemistry and structural refinement of chromites from different chromitite layers and xenoliths of the Bushveld complex European Journal of Mineralogy 19 599-6092007Bushveld complex, South Africa0293
0007241ChromiteLenaz D, Braidotti R, Princivalle F, Garuti G, Zaccarini F (2007) Crystal chemistry and structural refinement of chromites from different chromitite layers and xenoliths of the Bushveld complex European Journal of Mineralogy 19 599-6092007Bushveld complex, South Africa0293
0007242ChromiteLenaz D, Braidotti R, Princivalle F, Garuti G, Zaccarini F (2007) Crystal chemistry and structural refinement of chromites from different chromitite layers and xenoliths of the Bushveld complex European Journal of Mineralogy 19 599-6092007Bushveld complex, South Africa0293
0007243ChromiteLenaz D, Braidotti R, Princivalle F, Garuti G, Zaccarini F (2007) Crystal chemistry and structural refinement of chromites from different chromitite layers and xenoliths of the Bushveld complex European Journal of Mineralogy 19 599-6092007Bushveld complex, South Africa0293
0007244ChromiteLenaz D, Braidotti R, Princivalle F, Garuti G, Zaccarini F (2007) Crystal chemistry and structural refinement of chromites from different chromitite layers and xenoliths of the Bushveld complex European Journal of Mineralogy 19 599-6092007Bushveld complex, South Africa0293
0007245ChromiteLenaz D, Braidotti R, Princivalle F, Garuti G, Zaccarini F (2007) Crystal chemistry and structural refinement of chromites from different chromitite layers and xenoliths of the Bushveld complex European Journal of Mineralogy 19 599-6092007Bushveld complex, South Africa0293
0008912ChromiteLenaz D, Skogby H, Princivalle F, Halenius U (2004) Structural changes and valence states in the MgCr2O4-FeCr2O4 solid solution series Physics and Chemistry of Minerals 31 633-64220040293
0008913ChromiteLenaz D, Skogby H, Princivalle F, Halenius U (2004) Structural changes and valence states in the MgCr2O4-FeCr2O4 solid solution series Physics and Chemistry of Minerals 31 633-64220040293
0008914ChromiteLenaz D, Skogby H, Princivalle F, Halenius U (2004) Structural changes and valence states in the MgCr2O4-FeCr2O4 solid solution series Physics and Chemistry of Minerals 31 633-64220040293
0008915ChromiteLenaz D, Skogby H, Princivalle F, Halenius U (2004) Structural changes and valence states in the MgCr2O4-FeCr2O4 solid solution series Physics and Chemistry of Minerals 31 633-64220040293
0008916ChromiteLenaz D, Skogby H, Princivalle F, Halenius U (2004) Structural changes and valence states in the MgCr2O4-FeCr2O4 solid solution series Physics and Chemistry of Minerals 31 633-64220040293
0008917ChromiteLenaz D, Skogby H, Princivalle F, Halenius U (2004) Structural changes and valence states in the MgCr2O4-FeCr2O4 solid solution series Physics and Chemistry of Minerals 31 633-64220040293
0008918ChromiteLenaz D, Skogby H, Princivalle F, Halenius U (2004) Structural changes and valence states in the MgCr2O4-FeCr2O4 solid solution series Physics and Chemistry of Minerals 31 633-64220040293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.84 Å(10)
2.96 Å(30)
2.53 Å(100)
2.09 Å(20)
1.61 Å(40)
1.48 Å(50)
1.09 Å(10)
0.855 Å(10)
Comments:
ICDD 34-140 (synthetic). See also GSAM 85:195 (1962) natural material.

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Pre-terrestrial "Ur-minerals">4.57
1 : Stellar atmosphere condensates
Stage 1: Primary nebular phases4.567-4.561
4 : Primary chondrule phases4.566–4.561
Stage 2: Planetesimal differentiation and alteration4.566-4.550
5 : Primary asteroid phases4.566–4.560
6 : Secondary asteroid phases4.566-4.560
Stage 3a: Earth’s earliest Hadean crust>4.50
7 : Ultramafic igneous rocks
8 : Mafic igneous rocks
Near-surface Processes
26 : Hadean detrital minerals
Stage 4b: Highly evolved igneous rocks>3.0
36 : Carbonatites, kimberlites, and related igneous rocks
37 : Layered igneous intrusions and related PGE minerals
Stage 5: Initiation of plate tectonics<3.5-2.5
38 : Ophiolites
Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere<0.6
51 : Pyrometamorphic minerals (see also #54 and #56)<0.36
Geological Setting:
As a cumulate mineral layer in ultramafic igneous rocks, in peridotites. As placer deposits. Common in meteorites except carbonaceous chondrites.

Type Occurrence of ChromiteHide

Synonyms of ChromiteHide

Other Language Names for ChromiteHide

Varieties of ChromiteHide

Aluminian ChromiteAn Al-bearing variety of chromite; Cr:Al may vary from 3:1 to 1:1.
Part of the Chromite-Hercynite Series.
AlumoberezoviteA magnesian aluminian Chromite
BerezovskiteA Magnesian Chromite
Chromferrit
Ferrian ChromiteA member of Chromite-Magnetite Series - a ferrian variety of Chromite with Fe3+ contents 0,10-0,50 apfu.
FerrichromiteA member of Chromite-Magnetite Series - a ferrian variety of Chromite with Fe3+ contents 0,50-1 apfu.
LeopardenerzA variety of chromite (ore) which shows a leopard-like pattern: black chromite patches in a brighter matrix.
Titanium-bearing ChromiteA titanium-bearing variety of chromite.

Relationship of Chromite to other SpeciesHide

Other Members of this group:
CochromiteCoCr2O4Iso. m3m (4/m 3 2/m) : Fd3m
CoulsoniteFe2+V3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
CuprospinelCu2+Fe3+2O4Iso. m3m (4/m 3 2/m)
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
Jacobsite-QMn2+(Fe3+,Mn3+)2O4Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
Maghemite(Fe3+0.670.33)Fe3+2O4Iso. 4 3 2 : P41 3 2
MagnesiochromiteMgCr2O4Iso. m3m (4/m 3 2/m) : Fd3m
MagnesiocoulsoniteMgV2O4Iso. m3m (4/m 3 2/m)
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
Titanomaghemite(Ti4+0.50.5)Fe3+2O4Iso. 4 3 2 : P43 3 2
TrevoriteNi2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
UM1994-06-O:AlCoCoAl2O4
VuorelaineniteMn2+V3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
ZincochromiteZnCr2O4Iso. m3m (4/m 3 2/m) : Fd3m
Forms a series with:

Common AssociatesHide

Associated Minerals Based on Photo Data:
63 photos of Chromite associated with Serpentine SubgroupD3[Si2O5](OH)4
56 photos of Chromite associated with Chromium-bearing ClinochloreMg5(Al,Cr)2Si3O10(OH)8
55 photos of Chromite associated with UvaroviteCa3Cr2(SiO4)3
32 photos of Chromite associated with GrossularCa3Al2(SiO4)3
23 photos of Chromite associated with DiopsideCaMgSi2O6
20 photos of Chromite associated with Fayalite-Forsterite Series
19 photos of Chromite associated with ZaratiteNi3(CO3)(OH)4 · 4H2O ?
19 photos of Chromite associated with ClinochloreMg5Al(AlSi3O10)(OH)8
15 photos of Chromite associated with StichtiteMg6Cr3+2(OH)16[CO3] · 4H2O
15 photos of Chromite associated with MagnetiteFe2+Fe3+2O4

Related Minerals - Strunz-mindat GroupingHide

4.BB.Elgoresyite(Mg5Si2)O9Mon. 2/m : B2/m
4.BB.ChenmingiteFeCr2O4Orth. mmm (2/m 2/m 2/m) : Pnma
4.BB.DellagiustaiteV2+Al2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.ThermaerogeniteCuAl2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.ChukocheniteLiAl5O8Orth. mmm (2/m 2/m 2/m) : Imma
4.BB.GarpenbergiteMn6◻AsSbO10(OH)2Orth. mmm (2/m 2/m 2/m)
4.BB.MagnéliiteTi3+2Ti4+2O7Tric. 1 : P1
4.BB.JianmuiteZrTi4+Ti3+5Al3O16Tet. 4 : I4
4.BB.05CochromiteCoCr2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05CoulsoniteFe2+V3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05CuprospinelCu2+Fe3+2O4Iso. m3m (4/m 3 2/m)
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. m3m (4/m 3 2/m)
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.05UlvöspinelTiFe2+2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05VuorelaineniteMn2+V3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05ZincochromiteZnCr2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05HarmuniteCaFe2O4Orth. mmm (2/m 2/m 2/m) : Pbcm
4.BB.05WernerkrauseiteCa(Fe3+,Mn3+)2Mn4+O6Orth. mmm (2/m 2/m 2/m) : Pnma
4.BB.05Deltalumite(Al0.670.33)Al2O4Tet. 4 2m : P4m2
4.BB.05GuiteCo2+Co3+2O4Iso.
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.10Manganostibite(Mn,Fe)7SbAsO12Orth. mmm (2/m 2/m 2/m)
4.BB.15Maghemite(Fe3+0.670.33)Fe3+2O4Iso. 4 3 2 : P41 3 2
4.BB.15Titanomaghemite(Ti4+0.50.5)Fe3+2O4Iso. 4 3 2 : P43 3 2
4.BB.20Tegengrenite(Mn3+0.5Sb5+0.5)Mg2O4Trig. 3 : R3
4.BB.25XieiteFe2+Cr2O4Orth. mmm (2/m 2/m 2/m)
4.BB.30CarmeltaziteZrAl2Ti4O11Orth. mmm (2/m 2/m 2/m) : Pnma
4.BB.35FeiiteFe2+2(Fe2+Ti4+)O5Orth. mmm (2/m 2/m 2/m) : Cmcm
4.BB.40MaohokiteMgFe2O4Orth. mmm (2/m 2/m 2/m) : Pnma
4.BB.45Tschaunerite (Fe2+)(Fe2+Ti4+)O4Orth. mmm (2/m 2/m 2/m) : Cmcm

Fluorescence of ChromiteHide

Not fluorescent in UV

Other InformationHide

Notes:
Some are weakly magnetic due to zones of magnetite composition, etc.
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:
Major ore source for chromium.

Chromite in petrologyHide

Internet Links for ChromiteHide

References for ChromiteHide

Reference List:

Localities for ChromiteHide

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 ListShow

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Mineral and/or Locality  
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