Europium(III) arsenate is an arsenate salt of europium, with the chemical formula of EuAsO<sub>4</sub>. It has good thermal stability, with its pK<sub>sp,c</sub> of 22.53ñ0.03. It is a colorless crystal with a xenotime structure.
Europium(III) arsenate can be prepared by reacting sodium arsenate (Na<sub>3</sub>AsO<sub>4</sub>) in a europium(III) chloride (EuCl<sub>3</sub>) solution:
Reacting europium(III) oxide (Eu<sub>2</sub>O<sub>3</sub>) with arsenic pentoxide (As<sub>2</sub>O<sub>5</sub>) can also obtain europium(III) arsenate.