The TGA curve of the [Mn(O4C2)2H2O] is shown in Fig. 1. It can
be seen that there are two distinct weight loss steps. The first
weight loss occurs at 130 C, which corresponds to the evaporation
of crystallized water, that is to say, manganese oxalate dehydrate
in the stage. The second weight loss step occurs at the temperature
range 300–400 C. The weight loss at 300–400 C may be ascribed
to the decomposition of the oxalate. The weight loss of two steps is
about 19.60% and 49.41%, which is close to the theoretical value