E. Knaepen, J. Mullens, J. Yperman
Jul 25, 1996
Citations
0
Influential Citations
39
Citations
Journal
Thermochimica Acta
Abstract
Abstract Strontium oxalate exists in two different forms: the neutral strontium oxalate hydrate, SrC 2 O 4 · x H 2 O, and the acid salt of strontium oxalate, SrC 2 O 4 · y H 2 C 2 O 4 · x H 2 O. Depending on the concentration of oxalic acid and ammonium oxalate as precipitating agents, both forms can be obtained. At a sufficiently low pH, the stoichiometric compound SrC 2 O 4 ·1 2 H 2 C 2 O 4 · H 2 O is formed. The thermal decomposition of the different strontium oxalates is studied in different atmospheres using DSC, and TGA coupled with FTIR and MS. The TGA-EGA spectra indicate that the anhydrous acid oxalate decomposes with the release of H 2 O, CO, CO 2 and formic acid.