Tags: Chemical Compound, Chemical Substance.
Potassium dimanganate(III) K6Mn2O6 is a manganese(III) compound. Unlike lithium and sodium manganites MMnO2 which are best described as mixed oxides potassium dimanganite contains discrete Mn2O6−6 anions in the solid state. It rapidly hydrolyzes in air.K6Mn2O6 is prepared as ruby-red crystals by the reaction of excess potassium oxide with manganese(II) oxide in a sealed nickel bomb at 610 °C for ten days. The Mn2O6−6 anion has an Al2Cl6-type structure.