Tags: Chemical Compound, Chemical Substance.
Manganese violet is the inorganic compound called ammonium manganese(III) pyrophosphate. The formula indicates that pyrophosphate (P2O74-) ammonium (NH4+) and manganese(IIII) comprise this solid. It is prepared by heating a mixture of Mn2O3 diammonium phosphate and phosphoric acid. This material is a popular inorganic pigment.
