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Thermoanalytical Study of β-FeOOH Obtained by Homogeneous Precipitation with Urea

  • Ma Emilia García-Clavel
  • Sara Goñi-Elizalde

Abstract

Akaganéite specimens were obtained from Fe(III) hydrochloric solutions by the technique “precipitation from homogeneous solution”, using urea as the hydrolytic reagent.

It has been studied the influence of different precipitation conditions: concentration of the iron solution, concentration of urea, temperature and time of heating.We have established the optima conditions of akaganéite obtention: [Fe(III)]=3.7×10-2M; [(NH2)2CO]=0.74M; boiling point temperature; time of heating, 30–45 minutes.If it is employed a longer time of hea ting, the akaganéite changes to hematite.

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Copyright information

© Springer Basel AG 1980

Authors and Affiliations

  • Ma Emilia García-Clavel
    • 1
  • Sara Goñi-Elizalde
    • 1
  1. 1.Sección de Termoanálisis y Reactividad de Sólidos.Departamento de Química Analitica del C.S.I.C.Facultad de Ciencias QuímicasCiudad UniversitariaMadrid-3Spain

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