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Science 22 November 1968:
Vol. 162. no. 3856, pp. 895 - 896
DOI: 10.1126/science.162.3856.895
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Articles

Composition of Aqueous Solutions in Equilibrium with Sulfides and Oxides of Iron at 350°C

Bikash C. Raymahashay 1 and Heinrich D. Holland 2

1 Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, India
2 Department of Geological and Geophysical Sciences, Princeton University, Princeton, New Jersey

Solutions of potassium chloride (pH-buffered and 1-molal) equilibrated at 350°C with pyrrhotite, pyrite, and magnetite contained approximately 1 millimole of reduced sulfur and less than 0.1 millimole of oxidized sulfur per kilogram. Similar solutions equilibrated with pyrite, magnetite, and hematite contained approximately 1 millimole of reduced sulfur, but 3 to 6 millimoles of oxidized sulfur per kilogram. Both types of solutions contained less than 0.1 millimole of iron per kilogram at pH ge 6 and approximately 100 millimoles per kilogram at pH 2.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)