Praseodymium(III) phosphate

Praseodymium(III) phosphate is an inorganic compound with the chemical formula PrPO₄.

Preparation

Praseodymium(III) phosphate hemihydrate can be obtained by reacting praseodymium chloride and phosphoric acid:

It can also be produced by reacting silicon pyrophosphate (SiP₂O₇) and praseodymium(III,IV) oxide (Pr₆O₁₁) at 1200 Ã‚°C.

Properties

Praseodymium(III) phosphate forms light green crystals in the monoclinic crystal system, with space group P2₁/n and cell parameters a = 0.676 nm, b = 0.695 nm, c = 0.641 nm, β = 103.25°, Z = 4.

It forms a crystal hydrate of the composition PrPO₄·nH₂O, where n < 0.5, with light green crystals of hexagonal crystal system, space group P6₂22, and cell parameters a = 0.700 nm, c = 0.643 nm, Z = 3.

Praseodymium(III) phosphate reacts with sodium fluoride to obtain Na₂PrF₂(PO₄).

References