Mindat Logo

Cochromite

This page is currently not sponsored. Click here to sponsor this page.



Formula:
(Co,Ni,Fe)(Cr,Al)
 
2
O
 
4
Hardness:7
Member of:Spinel Group
Name:For cobalt and chromium in the composition.
This page provides mineralogical data about Cochromite.

Classification of Cochromite

IMA status:Approved
Strunz 8th edition ID:4/B.03-40
Nickel-Strunz 10th (pending) edition ID: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 edition ID:7.2.3.5

7 : MULTIPLE OXIDES
2 : AB2X4
Hey's CIM Ref.:7.21.3

7 : Oxides and Hydroxides
21 : Oxides of Co
mindat.org URL:http://www.mindat.org/min-1101.html
Please feel free to link to this page.

Type Occurrence of Cochromite

Type Locality:Bon Accord Ni Deposit, Bon Accord, Barberton, Ehlanzeni District, Mpumalanga Province, South Africa
Year of Discovery:1978

Physical Properties of Cochromite

Hardness (Mohs):7

Chemical Properties of Cochromite

Formula:
(Co,Ni,Fe)(Cr,Al)
 
2
O
 
4
Simplified for copy/paste:(Co,Ni,Fe)(Cr,Al)2O4
Essential elements:Co, Cr, O
All elements listed in formula:Al, Co, Cr, Fe, Ni, O

Relationship of Cochromite to other Species

Member of:Spinel Group
Other Members of Group:

- +
Ceylonite
Chromite
Fe
2+
 
Cr
3+
2
O
 
4
Coulsonite
Fe
2+
 
V
3+
2
O
 
4
Cuprospinel
Cu
2+
 
Fe
3+
2
O
 
4
Filipstadite
(Sb
 
0.5
Fe
 
0.5
)Mn
 
2
O
 
4
Franklinite
Zn
2+
 
Fe
3+
2
O
 
4
Gahnite
ZnAl
 
2
O
 
4
Galaxite
(Mn,Fe,Mg)(Al,Fe)
 
2
O
 
4
Hercynite
Fe
2+
 
Al
 
2
O
 
4
Jacobsite
Mn
2+
 
Fe
3+
2
O
 
4
Magnesiochromite
Mg(Cr,Al,Fe)
 
2
O
 
4
Magnesiocoulsonite
MgV
 
2
O
 
4
Magnesioferrite
MgFe
3+
2
O
 
4
Magnetite
Fe
2+
 
Fe
3+
2
O
 
4
Manganochromite
(Mn,Fe)(Cr,V)
 
2
O
 
4
Nichromite
(Ni,Co,Fe)(Cr,Fe,Al)
 
2
O
 
4
Qandilite
(Mg,Fe)
 
2
(Ti,Fe,Al)O
 
4
Spinel
MgAl
 
2
O
 
4
Trevorite
Ni
2+
 
Fe
3+
2
O
 
4
Ulvöspinel
Fe
 
2
TiO
 
4
Vuorelainenite
(Mn,Fe)(V,Cr)
 
2
O
 
4
Zincochromite
ZnCr
 
2
O
 
4
Related Minerals - Nickel-Strunz Grouping):

- +
4.BB.05Chromite
Fe
2+
 
Cr
3+
2
O
 
4
4.BB.05Coulsonite
Fe
2+
 
V
3+
2
O
 
4
4.BB.05Cuprospinel
Cu
2+
 
Fe
3+
2
O
 
4
4.BB.05Filipstadite
(Sb
 
0.5
Fe
 
0.5
)Mn
 
2
O
 
4
4.BB.05Franklinite
Zn
2+
 
Fe
3+
2
O
 
4
4.BB.05Gahnite
ZnAl
 
2
O
 
4
4.BB.05Galaxite
(Mn,Fe,Mg)(Al,Fe)
 
2
O
 
4
4.BB.05Hercynite
Fe
2+
 
Al
 
2
O
 
4
4.BB.05Jacobsite
Mn
2+
 
Fe
3+
2
O
 
4
4.BB.05Manganochromite
(Mn,Fe)(Cr,V)
 
2
O
 
4
4.BB.05Magnesiocoulsonite
MgV
 
2
O
 
4
4.BB.05Magnesiochromite
Mg(Cr,Al,Fe)
 
2
O
 
4
4.BB.05Magnesioferrite
MgFe
3+
2
O
 
4
4.BB.05Magnetite
Fe
2+
 
Fe
3+
2
O
 
4
4.BB.05Nichromite
(Ni,Co,Fe)(Cr,Fe,Al)
 
2
O
 
4
4.BB.05Qandilite
(Mg,Fe)
 
2
(Ti,Fe,Al)O
 
4
4.BB.05Spinel
MgAl
 
2
O
 
4
4.BB.05Trevorite
Ni
2+
 
Fe
3+
2
O
 
4
4.BB.05Ulvöspinel
Fe
 
2
TiO
 
4
4.BB.05Vuorelainenite
(Mn,Fe)(V,Cr)
 
2
O
 
4
4.BB.05Zincochromite
ZnCr
 
2
O
 
4
4.BB.10Hausmannite
MnMn
 
2
O
 
4
4.BB.10Hetaerolite
ZnMn
 
2
O
 
4
4.BB.10Hydrohetaerolite
ZnMn
 
2
O
 
4
· H
 
2
O
4.BB.10Iwakiite
Mn(Fe,Mn)
 
2
O
 
4
4.BB.15Maghemite
Fe
3+
2
O
 
3
4.BB.15Titanomaghemite
Fe
3+
 
(Fe
3+
 
,Ti
4+
 
,Fe
2+
 
,◻)
 
2
O
 
4
4.BB.20Tegengrenite
(Mg,Mn
2+
 
)
 
2
Sb
5+
0.5
(Mn
3+
 
,Si,Ti)
 
0.5
O
 
4
4.BB.25Xieite
Fe
2+
 
Cr
 
2
O
 
4
Related Minerals - Hey's Index Grouping:

- +
7.21.1Heterogenite
CoO(OH)
7.21.4Asbolane
(Ni,Co)
 
2-x
Mn
4+
 
(O,OH)
 
4
· nH
 
2
O

Other Names for Cochromite

Synonyms:
IMA1978-049
Other Languages:
German:Cochromit
Russian:Кохромит
Spanish:Cochromita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Cochromite

Reference List:

- +
Bulletin du BRGM (deuxième série), Section II (1978): 225-230.

Internet Links for Cochromite

Search Engines:
  • Look for Cochromite on Google
  • Look for Cochromite images on Google
  • External Links:
  • Look for Cochromite on Webmineral
  • Look for Cochromite on Athena Mineralogy
  • Look for Cochromite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Cochromite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
  • Buy RARE Minerals from Rocks of Africa
  • Fine and rare minerals from mintreasure.com
  • Fine minerals from bisbeeborn.com
  • Buy from McDougall Minerals
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • SpiriferMinerals.com - high quality low prices
  • The Arkenstone - Fine Minerals
  • Buy minerals from YourMineralCollection
  • Find Cochromite on www.crystalclassics.co.uk
  • Buy from David K Joyce minerals
  • rare and unusual minerals mainly crystallized
  • Localities for Cochromite

    (TL) indicates type locality. ? 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.
    South Africa
     
    • Mpumalanga Province
      • Ehlanzeni District
        • Barberton
          • Bon Accord
    Am Min 65 (1980), 811
    Mineral and/or Locality  
    Search Google  
    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
    Current server date and time: September 14, 2014 08:45:33
    Mineral and Locality Search
    Mineral:
    and/or Locality:
    Options
    Fade toolbar when not in focusFix toolbar to bottom of page
    Hide Social Media Links
    Slideshow frame delay seconds