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We report the fabrication of highly crystalline magnetite particles with a uniform morphology and a relatively uniform average size of 54 nm. Particles were fabricated by oxidation of Fe(OH) 2 by nitrate in basic aqueous media. Characterization of the particles by means of transmission electron microscopy, Raman spectroscopy, X-ray and electron diffraction, and magnetometry showed that they were octahedral magnetic monodomains of highly stoichiometric magnetite (unit formula was estimated to be Fe 2.985 O 4 ), with room-temperature ferrimagnetic behavior and a saturation magnetization of 81.6 emu/g.
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Vereda et al. (2008) studied this question.
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