The thermal behavior of tin containing oxalate, EDTA, and inositol-hexaphosphate were investigated. The end products of synthesis were identified by Mössbauer-, XRD analyses, and FTIR studies. The thermal decompose of the samples was studied by DTA-TG analysis. The simultaneously obtained DTA and TG data makes it possible to follow the thermal decomposition of the investigated samples. The tin oxalate decomposed in the temperature range of 520–625 K through tin carbonate formation and finally yielded CO2 and SnO. The tin EDTA complex first lost its hydrate bound water till 520 K. The followed thermal events related to the pyrolysis of anhydrous salt. The intense exothermic process that exists in the temperature range of 820–915 K is due to the formation of SnO2. The tin sodium inositol-hexaposphate lost its hydrate bound water (∼10%), up to 460 K. The following sharp exothermic process, in the temperature range of 680–750 K is due to the decomposition and parallel oxidation of organic part of the molecule. At the end of this process, a mixture of phosphorous pentaoxide, sodium carbonate, and tin dioxide is obtained.
1. Dollimore, D, Griffiths, DL. Differential thermal analysis study of various oxalates in oxygen and nitrogen. J Thermal Anal. 1970;2:229–250. .
Audebrand, N, Vaillant, M-L, Auffrédic, J-P, Louer, D. Synthesis, open-framework structure, and thermal behavior of ammonium, tin oxalate. Solid State Sci. 2001;3:483–494. 10.1016/S1293-2558(00)01148-1.)| false
Rak, J, Skurski, P, Gutowski, M, Blazejowski, J. Thermodynamics of the thermal decomposition of calcium oxalate monohydrate examined theoretically. J Therm Anal. 1995;43:239–246. 10.1007/BF02635991.)| false