![]() ![]() ![]() Hematite was detected only in solid residue produced during high temperature experiments. X-ray diffraction patterns and images from scanning electron microscopy reveal solid residues composed primarily of hydrated ferric iron sulfates and sporadic ferric–ferrous iron sulfates. Sulfate was the only aqueous sulfur species detected in solution, with sulfite and thiosulfate below the detection limits. No volatile sulfur species were recovered from any experiment. The dominant gaseous product was molecular oxygen. Gaseous, aqueous, and solid phases were collected and measured following sealed-tube experiments that lasted from 1 to 14 days. Oxidation of pyrite by hydrogen peroxide (H2O2) at millimolar levels has been studied from 4 to 150 ☌ in order to evaluate isotopic effects potentially associated with radiolytic oxidation of pyrite. ![]()
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