Abstract: By use of non-isothermal technique in hydrogen and helium atmosphere the solid state reaction of iron(Ⅲ) oxalate and Lewis base was studied by gas chroma-tography accompanied by IR, XRDand Mossbauer spectroscopy. The results show that the solid state reaction of iron oxalate and potassium tetrasulfide starts at 200℃ and ends at 300℃, releasing CO₂ and forming KFeS₂ which is confirmed by Mossbauer spectra and XRD. The solid state reaction of iron (Ⅲ) oxalate and sodium hydroxide takes place at room temperature, which turns the reactant color to brown, resulting in the formation of alpha-Fe₂O₃ and Fe(OH)₃, with the rising of temperature the amount of alpha Fe₂O₃ is increased due to the deaquation of Fe(OH)₃, no CO₂ is released around 180℃ indicating the entirely dissappearance of iron (Ⅲ) oxalate, which confirms the completion of the solid state reaction.

Key words: Solid state reaction, Iron(Ⅲ) oxalate, Gas chromatography