The formation of MnCO3 from Mn(CH3COO)2.4H2O is
probably due to a reduction of Mn (Mn3+ →Mn2+) [12].
Consequently, the thermal decomposition of most of Mn acetate
in air (in the temperature range 250–330◦C) leads normally
to the formation of mixed oxides of MnO2, Mn2O3
and Mn3O4. It is known that the differences in oxalate hydrate
stoichiometries and environments can result in the formation
of different Mn oxide products [13]. Therefore, the
possible formation of the prepared LSMO in our study is as
follows: