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Journal of Radioanalytical and Nuclear Chemistry

, Volume 214, Issue 6, pp 469–478 | Cite as

Mössbauer studies on thermal decomposition of some alkali tris (malonato) ferrate (III) tetrahydrates

  • B. S. Randhawa
  • Sandeep Kaur
  • P. S. Bassi
Article

Abstract

Thermal decomposition of some alkali tris (malonato) ferrate (III) tetrahydrates, i. e. M3 [Fe(CH2C2O4)3]·4H2O (M=Na, K) has been studied in the temperature range of 433–973 K in static air atmosphere using Mössbauer, IR and TG-DTG-DTA techniques. Mössbauer spectra are reported at different stages to study the mechanism of decomposition. The anhydrous complex decomposed into α-Fe2O3 of varying particle sizes and alkali metal malonate/carbonate in successive stages. In the final stage of remixing of cations, a solid state reaction between α-Fe2O3 and alkali metal carbonate/oxide gives fine particles of the respective ferrites at temperatures lower than for oxalate precursor or even for ceramic method. Thermal stability obeys the order: sodium > potassium > lithium tris(malonato) ferrate (III).

Keywords

Particle Size 4H2O Lithium Ferrite Thermal Stability 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Akadémiai Kiadó 1996

Authors and Affiliations

  • B. S. Randhawa
    • 1
  • Sandeep Kaur
    • 1
  • P. S. Bassi
    • 1
  1. 1.Department of ChemistryGuru Nanak Dev UniversityAmritsarIndia

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