Manganese violet


Manganese violet is the common name for ammonium manganese pyrophosphate, an inorganic compound composed of ammonium, manganese in the +3 oxidation state, and the pyrophosphate anion. It is prepared by heating a mixture of manganese oxide, diammonium phosphate, and phosphoric acid. This material is a popular inorganic pigment.

Chemical structure

Two polymorphs are known, referred to as the α- and β-forms, but in each case the structures are similar. The Mn centres occupy distorted octahedral sites, being surrounded by six oxygens provided by the pyrophosphate ligands.

Spectra

IR-spectra, reflectance, and fluorescence spectra can be found at ColourLex.

Use

Manganese violet is used in eye liner pencils, eye shadow, lipstick, nail enamel, and oil paint.