Nanoparticles of nonstoichiometric magnetite obtained by controlled oxidation of carbonyl iron (α-Fe) in water are studied. The Fe : H₂O mole ratio is 3 : 4, 4 : 4 and 3 : 10. The particles are synthesized in a high-power Activator 2S mill in an air atmosphere by 24-h milling. X-ray diffraction and spectrum analyses of the synthesized magnetite nanoparticles are performed. Formulas describing the crystal chemistry of the nanoparticles are derived using the data of Mossbauer spectroscopy. The magnetic properties and the microstructure of the nanoparticles are studied.

中文翻译：

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机械化学合成磁铁矿纳米颗粒的结构和磁性

研究了通过在水中受控氧化羰基铁 (α-Fe) 获得的非化学计量磁铁矿纳米颗粒。Fe:H ₂ O 摩尔比为 3:4、4:4 和 3:10。颗粒是在高功率 Activator 2S 研磨机中在空气气氛中通过 24 小时研磨合成的。对合成的磁铁矿纳米粒子进行 X 射线衍射和光谱分析。描述纳米粒子晶体化学的公式是使用穆斯堡尔光谱数据推导出来的。研究了纳米颗粒的磁性和微观结构。