Gadolinium oxide from gadolinium oxalate hydrate physicochemical characterization

Gd2(C2O4)3·10H2O was used as a parent compound for the formation of Gd2O3 at up to 800 °C in an atmosphere of air. Thermal processes occurring during the decomposition course were monitored by means of differential thermal analysis, DTA, and Thermogravimetry, TG. Intermediates and final solid products were characterized by XRD and IR Spectroscopy. The results showed that Gd2(C2O4)3.10H2O decomposes to Gd2O3 at 575 °C through different intermediates, Gd2O2CO3 was defined as a stable intermediate. The final product Gd2O3 has a surface area of 23.4 m2 g−1.