Praseodymium(III) carbonate is an inorganic compound, with a chemical formula of Pr2(CO3)3.

The anhydrous form is olive green, and many of its hydrates such as heptahydrate and octahydrate are known.

[2] Praseodymium(III) carbonate can be obtained by the hydrolysis of praseodymium(III) chloroacetate:[2][4] It can also be obtained by reacting sodium bicarbonate saturated with carbon dioxide with a praseodymium chloride solution.

[4] Praseodymium(III) carbonate is soluble in acids, and emits carbon dioxide:[5] However, it is insoluble in water.

[2] Praseodymium(III) carbonate forms compounds with N2H4, such as Pr2(CO3)3•12N2H4•5H2O which is a pale green crystal that is slightly soluble in water but insoluble in benzene, with d20°C = 1.873 g/cm3.