Praseodymium (III,IV) oxide is the inorganic compound with the formula Pr6O11 that is insoluble in water. It has a cubic fluorite structure.
Molar mass： 1021.44 g/mol
Appearance： dark brown powder
Density： 6.5 g/mL
Melting point： 2,183 °C (3,961 °F; 2,456 K).
Boiling point： 3,760 °C (6,800 °F; 4,030 K)
Praseodymium(III, IV) oxide is used in pigment in glass, optic and ceramic industries. Praseodymium-doped glass, called didymium glass is used in welding, blacksmithing, and glass-blowing goggles due to its blocking property of infrared radiation. It is employed in the solid state synthesis of praseodymium molybdenum oxide, which is used as a semiconductor.