Mineralogy Database

Cochromite Mineral Data

Search Webmineral :
  

General Cochromite Information

Help on Chemical Formula: Chemical Formula: (Co,Ni,Fe++)(Cr,Al)2O4
Help on Composition: Composition: Molecular Weight = 207.97 gm
   Magnesium   1.17 %  Mg    1.94 % MgO
   Aluminum    5.19 %  Al    9.81 % Al2O3
   Chromium   35.00 %  Cr   51.16 % Cr2O3
   Iron        8.06 %  Fe    6.91 % FeO /  3.84 % Fe2O3
   Cobalt     14.17 %  Co   18.01 % CoO
   Nickel      5.64 %  Ni    7.18 % NiO
   Oxygen     30.77 %  O
             ______        ______ 
             100.00 %       98.85 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Co0.5Ni0.2Fe2+0.2Mg0.1Cr1.4Al0.4Fe3+0.1O4
Help on Environment: Environment: Replacing chromite in a small tabular nickel deposit in a contact between quartzite and serpentinized ultramafics.
Help on IMA Status: IMA Status: Approved IMA 1978
Help on Locality: Locality: Bon Accord deposit, Barberton, Transvaal, South Africa. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for a chromite with essential cobalt.
Help on Synonym: Synonym: ICSD 69503
  PDF 22-1084