Caesium permanganate

Caesium permanganate is the permanganate salt of caesium, with the chemical formula CsMnO4.

Preparation
Caesium permanganate can be formed by the reaction of potassium permanganate and caesium nitrate:


 * CsNO3 + KMnO4 -> KNO3 + CsMnO4 ↓

Physical
Caesium permanganate is soluble in water with a solubility of 0.97 g/L at 1 °C, 2.3 g/L at 19 °C, and 12.5 g/L at 59 °C. Its crystal structure is orthorhombic, the same as rubidium permanganate, ammonium permanganate and potassium permanganate.

Chemical
Similar to potassium permanganate, the two-step decomposition of caesium permanganate leads to the formation of caesium manganate intermediates. It breaks down into manganese dioxide, caesium oxide and oxygen. The decomposition temperature is between 200 and 300 °C. Drift-away oxygen caused an 8% mass loss in the product.


 * 10CsMnO4 -> 3Cs2MnO4 + 7MnO2 + 2Cs2O + 6O2 ↑
 * 2Cs2MnO4 -> 2MnO2 + 2Cs2O + O2 ↑

Total reaction:


 * 4CsMnO4 -> 4MnO2 + 2Cs2O + 3O2 ↑