Ceric orthophosphate

When sodium phosphate is added to a slightly acid solution of a ceric salt, a yellow precipitate is obtained. According to Hartley, the composition of this precipitate (dried in vacuo over sulphuric acid) is in accordance with the formula 2Ce^IV₂H(PO₄)₃.25H₂O, but this cannot be considered as definitely established.

Ceric pyrophosphate, CeP₂O₇.xH₂O(?), like the corresponding thorium salt, is practically insoluble in dilute mineral acids. It is obtained as a yellow precipitate by warming a solution of cerous pyrophosphate in hydrochloric acid with bromine.