Cobalt phosphate is the inorganic compound with the formula Co3(PO4)2.
[2] Thin films of this material are water oxidation catalysts.
[3] The tetrahydrate Co3(PO4)2•4H2O precipitates as a solid upon mixing aqueous solutions of cobalt(II) and phosphate salts.
According to X-ray crystallography, the anhydrous Co3(PO4)2 consists of discrete phosphate (PO3−4) anions that link Co2+ centres.
The cobalt ions occupy both octahedral (six-coordinate) and pentacoordinate sites in a 1:2 ratio.