Czechoslovak Journal of Physics

, Volume 51, Issue 7, pp 719–726 | Cite as

Mechanism of solid-state oxidation of FeSO4·H2O: model of simultaneous reactions

  • R. Zboril
  • M. Mashlan
  • D. Krausova


The mechanism of the thermal transformation of FeSO4·H2O in air has been studied under isothermal conditions at temperatures (150–460)°C using mainly57Fe Mössbauer spectroscopy and X-ray powder diffraction (XRD). Two trends are typical for the thermal behaviour of FeSO4·H2O in air, a tendency toward oxidation and dehydration. We suggested a new transformation model consisting of two ways of oxidation, direct one and indirect one. Fe(OH)SO4 was identified as a product of the direct way, Fe2(SO4)3 and superparamagnetic nanoparticles ofγ-Fe2O3 as products of the indirect way. The suggested model of simultaneous reactions explains the unusual non-monotonous dependence of the oxidation level of the thermally treated samples on temperature.


FeSO4 Maghemite Oxidation Level Thermal Transformation Simultaneous Reaction 
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Copyright information

© Institute of Physics, Acad. Sci. CR 2001

Authors and Affiliations

  • R. Zboril
    • 1
  • M. Mashlan
    • 1
  • D. Krausova
    • 2
  1. 1.Department of Experimental PhysicsPalacký UniversityOlomoucCzech Republic
  2. 2.Department of Inorganic and Physical ChemistryPalacký UniversityOlomoucCzech Republic

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