Vote for your favorite mineral in #MinCup26! - Erythrite vs. Skutterudite
Pretty pink and poisonous Erythrite is against its shiny silver and structurally-useful Skutterudite.
Log InRegister
Quick Links : The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic TimeExplore Fossils
Minerals by PropertiesMinerals by ChemistryMineral Visual ExplorerAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral QuizTime Machine
Photo SearchPhoto GalleriesSearch by ColorPhoto Colour ExplorerNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Nichromite

Valid as an unnamed mineral
This page is currently not sponsored. Click here to sponsor this page.
Formula:
(Ni,Co,Fe)(Cr,Fe,Al)2O4
Colour:
Dark green, black
Lustre:
Metallic
Hardness:
6 - 6½
Specific Gravity:
5.10 (Calculated)
Crystal System:
Isometric
Originally reported from Bon Accord Ni Deposit, Bon Accord, Barberton District, Mpumalanga Province, South Africa.


Hide all sections | Show all sections

Unique IdentifiersHide

Mindat ID:
2894
Long-form identifier:
mindat:1:1:2894:9

IMA Classification of NichromiteHide

IMA status notes:
Unnamed (probably valid)
Approval history:
Unnamed, but probably valid.

Classification of NichromiteHide

Strunz-mindat (2026):
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
Dana 8th ed.:
7.2.3.4

7 : MULTIPLE OXIDES
2 : AB2X4
Hey's CIM Ref.:
7.22.7

7 : Oxides and Hydroxides
22 : Oxides of Ni

Physical Properties of NichromiteHide

Lustre:
Metallic
Transparency:
Opaque
Colour:
Dark green, black
Streak:
Greyish green
Hardness:
6 - 6½ on Mohs scale
Fracture:
Conchoidal
Density:
5.10 g/cm3 (Calculated)

Optical Data of NichromiteHide

Type:
Isotropic

Chemistry of NichromiteHide

Mindat Formula:
(Ni,Co,Fe)(Cr,Fe,Al)2O4
Element Weights:
Element% weight
Cr45.876 %
O28.232 %
Ni25.892 %

Calculated from ideal end-member formula.
Elements listed:
Al, Co, Cr, Fe, Ni, O - search for minerals with similar chemistry

Crystallography of NichromiteHide

Crystal System:
Isometric
Class (H-M):
m3m(4/m32/m) - Hexoctahedral
Space Group:
Fd3m
Cell Parameters:
a = 8.31 Å
Unit Cell V:
573.86 ų (Calculated from Unit Cell)
Z:
8

Other Language Names for NichromiteHide

Relationship of Nichromite to other SpeciesHide

Member of:
Spinel Subgroup > Oxyspinel Group > Spinel Supergroup
Other Members of Spinel Subgroup:
ChihmingiteNiAl2O4Iso. m3m(4/m32/m) : Fd3m
ChromiteFe2+Cr3+2O4Iso. m3m(4/m32/m) : Fd3m
CochromiteCoCr2O4Iso. m3m(4/m32/m) : Fd3m
CoulsoniteFe2+V3+2O4Iso. m3m(4/m32/m) : Fd3m
CuprospinelCu2+Fe3+2O4Iso. m3m(4/m32/m) : Fd3m
DellagiustaiteV2+Al2O4Iso. m3m(4/m32/m) : Fd3m
Deltalumite(Al0.67◻0.33)Al2O4Tet. 42m : P4m2
FrankliniteZn2+Fe3+2O4Iso. m3m(4/m32/m) : Fd3m
GahniteZnAl2O4Iso. m3m(4/m32/m) : Fd3m
GalaxiteMn2+Al2O4Iso. m3m(4/m32/m) : Fd3m
GuiteCo2+Co3+2O4Iso.
HausmanniteMn2+Mn3+2O4Tet. 4/mmm(4/m2/m2/m) : I41/amd
HercyniteFe2+Al2O4Iso. m3m(4/m32/m) : Fd3m
HetaeroliteZnMn2O4Tet. 4/mmm(4/m2/m2/m) : I41/amd
JacobsiteMn2+Fe3+2O4Iso. m3m(4/m32/m) : Fd3m
'Jacobsite-Q'Mn2+(Fe3+,Mn3+)2O4Tet. 4/mmm(4/m2/m2/m) : I41/amd
Maghemite(Fe3+0.67◻0.33)Fe3+2O4Iso. 432 : P4132
MagnesiochromiteMgCr2O4Iso. m3m(4/m32/m) : Fd3m
MagnesiocoulsoniteMgV2O4Iso. m3m(4/m32/m)
MagnesioferriteMgFe3+2O4Iso. m3m(4/m32/m) : Fd3m
MagnetiteFe2+Fe3+2O4Iso. m3m(4/m32/m) : Fd3m
ManganochromiteMn2+Cr2O4Iso. m3m(4/m32/m) : Fd3m
SpinelMgAl2O4Iso. m3m(4/m32/m) : Fd3m
ThermaerogeniteCuAl2O4Iso. m3m(4/m32/m) : Fd3m
Titanomaghemite(Ti4+0.5◻0.5)Fe3+2O4Iso. 432 : P4332
TrevoriteNi2+Fe3+2O4Iso. m3m(4/m32/m) : Fd3m
'UM1994-06-O:AlCo'CoAl2O4
VuorelaineniteMn2+V3+2O4Iso. m3m(4/m32/m) : Fd3m
ZincochromiteZnCr2O4Iso. m3m(4/m32/m) : Fd3m

Related Minerals - Strunz-mindat GroupingHide

4.BB.ChenmingiteFeCr2O4Orth. mmm(2/m2/m2/m) : Pnma
4.BB.ThermaerogeniteCuAl2O4Iso. m3m(4/m32/m) : Fd3m
4.BB.ChukocheniteLiAl5O8Orth. mmm(2/m2/m2/m) : Imma
4.BB.Elgoresyite(Mg5Si2)O9Mon. 2/m : B2/m
4.BB.JianmuiteZrTi4+Ti3+5Al3O16Tet. 4 : I4
4.BB.DellagiustaiteV2+Al2O4Iso. m3m(4/m32/m) : Fd3m
4.BB.GarpenbergiteMn6◻AsSbO10(OH)2Orth. mmm(2/m2/m2/m)
4.BB.MagnéliiteTi3+2Ti4+2O7Tric. 1 : P1
4.BB.05Qandilite(Mg,Fe3+)2(Ti,Fe3+,Al)O4Iso. m3m(4/m32/m) : Fd3m
4.BB.05ChromiteFe2+Cr3+2O4Iso. m3m(4/m32/m) : Fd3m
4.BB.05Filipstadite(Fe3+0.5Sb5+0.5)Mn2O4Iso.
4.BB.05JacobsiteMn2+Fe3+2O4Iso. m3m(4/m32/m) : Fd3m
4.BB.05WernerkrauseiteCa(Fe3+,Mn3+)2Mn4+O6Orth. mmm(2/m2/m2/m) : Pnma
4.BB.05HarmuniteCaFe2O4Orth. mmm(2/m2/m2/m) : Pbcm
4.BB.05ZincochromiteZnCr2O4Iso. m3m(4/m32/m) : Fd3m
4.BB.05Deltalumite(Al0.67◻0.33)Al2O4Tet. 42m : P4m2
4.BB.05FrankliniteZn2+Fe3+2O4Iso. m3m(4/m32/m) : Fd3m
4.BB.05CochromiteCoCr2O4Iso. m3m(4/m32/m) : Fd3m
4.BB.05HercyniteFe2+Al2O4Iso. m3m(4/m32/m) : Fd3m
4.BB.05GahniteZnAl2O4Iso. m3m(4/m32/m) : Fd3m
4.BB.05GalaxiteMn2+Al2O4Iso. m3m(4/m32/m) : Fd3m
4.BB.05GuiteCo2+Co3+2O4Iso.
4.BB.05CoulsoniteFe2+V3+2O4Iso. m3m(4/m32/m) : Fd3m
4.BB.05VuorelaineniteMn2+V3+2O4Iso. m3m(4/m32/m) : Fd3m
4.BB.05SpinelMgAl2O4Iso. m3m(4/m32/m) : Fd3m
4.BB.05CuprospinelCu2+Fe3+2O4Iso. m3m(4/m32/m) : Fd3m
4.BB.05ManganochromiteMn2+Cr2O4Iso. m3m(4/m32/m) : Fd3m
4.BB.05MagnesiocoulsoniteMgV2O4Iso. m3m(4/m32/m)
4.BB.05TrevoriteNi2+Fe3+2O4Iso. m3m(4/m32/m) : Fd3m
4.BB.05MagnesiochromiteMgCr2O4Iso. m3m(4/m32/m) : Fd3m
4.BB.05MagnesioferriteMgFe3+2O4Iso. m3m(4/m32/m) : Fd3m
4.BB.05MagnetiteFe2+Fe3+2O4Iso. m3m(4/m32/m) : Fd3m
4.BB.05UlvöspinelTiFe2+2O4Iso. m3m(4/m32/m) : Fd3m
4.BB.10HausmanniteMn2+Mn3+2O4Tet. 4/mmm(4/m2/m2/m) : I41/amd
4.BB.10HetaeroliteZnMn2O4Tet. 4/mmm(4/m2/m2/m) : I41/amd
4.BB.10Manganostibite(Mn,Fe)7SbAsO12Orth. mmm(2/m2/m2/m)
4.BB.15Titanomaghemite(Ti4+0.5◻0.5)Fe3+2O4Iso. 432 : P4332
4.BB.15Maghemite(Fe3+0.67◻0.33)Fe3+2O4Iso. 432 : P4132
4.BB.20Tegengrenite(Mn3+0.5Sb5+0.5)Mg2O4Trig. 3 : R3
4.BB.25XieiteFe2+Cr2O4Orth. mmm(2/m2/m2/m)
4.BB.30CarmeltaziteZrAl2Ti4O11Orth. mmm(2/m2/m2/m) : Pnma
4.BB.35FeiiteFe2+2(Fe2+Ti4+)O5Orth. mmm(2/m2/m2/m) : Cmcm
4.BB.40MaohokiteMgFe2O4Orth. mmm(2/m2/m2/m) : Pnma
4.BB.45Tschaunerite (Fe2+)(Fe2+Ti4+)O4Orth. mmm(2/m2/m2/m) : Cmcm

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.

Internet Links for NichromiteHide

References for NichromiteHide

Localities for NichromiteHide

Showing 1 localities.

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.
Hide all sections | Show all sections

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
South Africa
 
  • Mpumalanga
    • Ehlanzeni District Municipality
      • Mbombela Local Municipality
        • Barberton
Cairncross et al. (1995)
Quick NavTopUnique IdentifiersIMA Classification Classification Physical Properties Optical Data Chemistry Crystallography Other LanguagesRelationshipsStrunz-MindatOther InformationInternet Links References Localities Locality List
 
and/or  
Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
Content on this site may not be used to train, fine-tune, or otherwise develop artificial intelligence or machine learning models without prior written permission - see our Terms & Conditions.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: September 2, 2026 01:02:50 Page updated: July 19, 2026 22:25:14
Go to top of page