Cupric ferrite

Copper ferrites have been included in the model, but have as yet not been found to be equilibrium controls on copper or iron solubility. The calculated activity products for the two minerals, cuprous ferrite and cupric ferrite, are characteristically several orders of magnitude oversaturated when compared to their respective equilibrium constants in a wide variety of surface waters. 

We then define an initial fluid representing the unreacted drainage. We set the fluid s iron content by assuming equilibrium with jarosite [NaFe3(SO4)2(OH)6] and prescribe a high content of dissolved arsenite, arsenate, cupric copper, lead, and zinc. Finally, we suppress hematite and goethite (which are more stable than ferric hydroxide) and two ferrite minerals (e.g., ZnFe2O4), which we consider unlikely to form. The procedure is... 

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