Samarium(III) phosphate is an inorganic compound, with the chemical formula of SmPO<sub>4</sub>. It is one of the phosphates of samarium.
Samarium(III) phosphate can be obtained by reacting sodium metaphosphate with any soluble samarium(III) salt:
Samarium(III) phosphate can also be obtained by reacting phosphoric acid and samarium(III) chloride.
Samarium(III) phosphate reacts with sodium fluoride at 750 ðC to form Na<sub>2</sub>SmF<sub>2</sub>PO<sub>4</sub>. Samarium(III) phosphate forms crystals of the monoclinic crystal system, with space group P2<sub>1</sub>/n, and lattice parameters a = 0.6669 nm, b = 0.6868 nm, c = 0.6351 nm, ò = 103.92 ð, Z = 4.