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Mechanism of thermal decomposition of K2FeO4 and BaFeO4: A review

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Abstract

This paper presents thermal decomposition of potassium ferrate(VI) (K2FeO4) and barium ferrate(VI) (BaFeO4) in air and nitrogen atmosphere. Mössbauer spectroscopy and nuclear forward scattering (NFS) synchrotron radiation approaches are reviewed to advance understanding of electron-transfer processes involved in reduction of ferrate(VI) to Fe(III) phases. Direct evidences of Fe V and Fe IV as intermediate iron species using the applied techniques are given. Thermal decomposition of K2FeO4 involved Fe V, Fe IV, and K3FeO3 as intermediate species while BaFeO3 (i.e. Fe IV) was the only intermediate species during the decomposition of BaFeO4. Nature of ferrite species, formed as final Fe(III) species, of thermal decomposition of K2FeO4 and BaFeO4 under different conditions are evaluated. Steps of the mechanisms of thermal decomposition of ferrate(VI), which reasonably explained experimental observations of applied approaches in conjunction with thermal and surface techniques, are summarized.

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Authors and Affiliations

  1. Department of Environmental and Occupational Health, School of Public Health, Texas A&M University, 1266 TAMU, College Station, Texas, 77843, USA

    Virender K. Sharma

  2. Regional Centre of Advanced Technologies and Materials, Departments of Experimental Physics and Physical Chemistry, Faculty of Science, Palacky University, Olomouc, Czech Republic

    Virender K. Sharma & Libor Machala

Authors
  1. Virender K. Sharma
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  2. Libor Machala
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Correspondence to Virender K. Sharma.

Additional information

This article is part of the Topical Collection on Proceedings of the 2nd Mediterranean Conference on the Applications of the Mössbauer Effect (MECAME 2016), Cavtat, Croatia, 31 May-3 June 2016

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Sharma, V.K., Machala, L. Mechanism of thermal decomposition of K2FeO4 and BaFeO4: A review. Hyperfine Interact 237, 128 (2016). https://doi.org/10.1007/s10751-016-1338-x

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  • DOI: https://doi.org/10.1007/s10751-016-1338-x

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