Erbium iodate is an inorganic compound with the chemical formula Er(IO3)3.

Erbium iodate can be obtained by reacting erbium periodate and periodic acid in water at 160 °C.

The reaction will produce anhydrous and dihydrate crystals.

[2] Erbium iodate dihydrate is stable below 266 °C, loses two molecules of water at 289 °C, and decomposes at 589 °C to generate iodine and release oxygen.

[3]