Mineralogy Database

Modderite Mineral Data

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General Modderite Information

Help on Chemical  Formula: Chemical Formula: (Co,Fe)As
Help on Composition: Composition: Molecular Weight = 133.08 gm
   Iron     10.49 %  Fe
   Cobalt   33.21 %  Co
   Arsenic  56.30 %  As
           100.00 % 
Help on Empirical Formula: Empirical Formula: Co0.75Fe2+0.25As
Help on Environment: Environment: In heavy mineral concentrates.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1924
Help on Locality: Locality: Modderfontein mine, Witwatersrand, Transvaal, South Africa. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Modderite + Pronunciation Say MODDERITE
Help on Synonym: Synonym: ICSD 48026
  PDF Sep-94