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Ferrimagnetism - 1 of 2


One hundred milliliters of 0.1 molar iron(III) ammonium sulfate are added to fifty milliliters of 0.1 molar iron(II) ammonium sulfate. Addition of aqueous ammonia to the iron(III) solution gives brown iron(III) oxide, called hematite. Addition of ammonia to the iron(II)/iron(III) mixture gives black Fe3O4, called magnetite.

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