The Thermal Decomposition of Manganese(III) Phosphate Monohydrate

Abstract Manganese(III) phosphate monohydrate begins to decompose at 200 °C by the dehydration accompanying the reduction of manganese(III) and changes completely to manganese(II) pyrophosphate at 500 °C. The reaction order and activation energy for the reduction process are 1.3 and 176.8 kJ mol−1, respectively.