Yttrium(III) phosphate

Yttrium phosphate can be obtained by reacting yttrium chloride and sodium phosphate, or by reacting yttrium nitrate and diammonium hydrogen phosphate in solution: : Yttrium chloride and phosphoric acid are mixed at 35~40°C, and then ammonia solution is added dropwise to react: : == Properties ==

Yttrium phosphate belongs to the tetragonal crystal system, and the unit cell parameters are a=0.68832 nm, c=0.60208 nm. It can exist as a monohydrate, dihydrate or the anhydrous form. The dihydrate belongs to the monoclinic crystal system, the space group is B 2/b, and the unit cell parameters are a=0.648 nm, b=1.512 nm, c=0.628 nm, β=129.4°, Z=4. Yttrium phosphate reacts with concentrated alkali to form yttrium hydroxide. == Uses ==

Yttrium phosphate is used as a catalyst and is a potential containment material for nuclear waste. Double-doped materials such as Ce3+-Tb3+ have also been reported. == References ==