Abstract
The present paper analyzes the valence-coordination state of iron atoms in polymer composite materials fabricated from polystyrene and iron-ore concentrates – magnetite and hematite – upon exposure to fast electrons with energy of 6.2 MeV and fluence of 1018 electrons/cm2. Changes in the phase content and valence-coordination and magnetic states of iron atoms are established. After irradiation, the hematite phase is transformed into the magnetite phase with a predominance of Fe3+ ions with [FeO4] coordination, and the magnetite phase forms the wustite-type (FeO) phase in which Fe2+ ions are arranged in [FeO6] coordination.
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