Physicochemical studies on thermal analysis of magnesium tris(malonato) ferrate(III) decahydrate

Abstract

Thermal decomposition of magnesium tris(malonato)ferrate(III) decahydrate, i.e. Mg₃[Fe(CH₂C₂O₄)₃]₂.10H₂O has been studied in the temperature range of 300-1073 K in static air atmosphere using Mossbauer, IR, TGDTA- DTG and XRD techniques. Thermolysis of the above salt proceeds without the salt undergoing reduction to Fe(II) intermediate, The particle size of ɑ-Fe₂O₃, formed as an intermediate increases with increase in decomposition temperature from 473 K to 773 K, At higher temperature, fine particles of magnesium ferrite, MgFe₂O₄ are formed as a result of solid state reaction between ɑ-Fe₂O₃ and magnesium oxide.