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Mössbauer study of the thermal decomposition of iron(III) citrate pentahydrate

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Abstract

The thermal decomposition of iron(III) citrate pentahydrate, Fe(C6H5O7) · 5 H2O, has been investigated at different temperatures in air using Mössbauer spectroscopy, nonisothermal techniques (DTA-TG) and X-ray diffraction. The reduction of iron(III) to iron(II) takes place at 553 K. At higher temperature the formation of α-Fe2O3 and γ-Fe2O3 as the ultimate thermal decomposition products has been confirmed.

Zusammenfassung

Die thermische Zersetzung des Pentahydrates von Eisen(III)-citrat in Luft wurde bei verschiedenen Temperaturen durch Mössbauer-Spektroskopie, nicht-isotherme Techniken (DTA, TG) und Röntgendiffraktometrie untersucht. Die Reduktion von Eisen(III) zu Eisen(II) erfolgt bei 553 K. Bei höheren Temperaturen entstehen α-Fe2O3 und γ-Fe2O3 als End-produkte der thermischen Zersetzung.

Резюме

Используя неизотерм ические методы (ДТА-Т Г), мвссбауэровскую спе ктроскопию и рентгено-диффракци онный метод, было иссл едовано термическое разложе ние пятигидрата лимонно кислого железа (***) в атм осфере воздуха. При 553 К протек ает восстановление трех валентного железа до двухвалентного. Подт верждено, что при боле е высоких температура х имеет место совмест ное образование а-Fе2О3 и γ-Fe2O3. как конечных продуктов термическ ого разложения.

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Author information

Authors and Affiliations

  1. Chemistry Department, Guru Nanak Dev University, 143 005, Amritsar, India

    P. S. Bassi & B. S. Randhawa

  2. Chemistry Department, University of Jammu, 180 001, Jammu, India

    H. S. Jamwal

Authors
  1. P. S. Bassi
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  2. B. S. Randhawa
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  3. H. S. Jamwal
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Additional information

The authors are grateful to Dr. B. Mukherjee, C. G. C. R. Institute, Calcutta, for recording the X-ray diffraction pattern.

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Bassi, P.S., Randhawa, B.S. & Jamwal, H.S. Mössbauer study of the thermal decomposition of iron(III) citrate pentahydrate. Journal of Thermal Analysis 29, 439–444 (1984). https://doi.org/10.1007/BF01913454

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  • DOI: https://doi.org/10.1007/BF01913454

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