Abstract: | The structure of the hydrothermally synthesized compound AgCo3PO4(HPO4)2, silver tricobalt phosphate bis(hydrogen phosphate), consists of edge‐sharing CoO6 chains linked together by the phosphate groups and hydrogen bonds. The three‐dimensional framework delimits two types of tunnels which accommodate Ag+ cations and OH groups. The title compound is isostructural with the compounds AM3H2(XO4)3 (A = Na or Ag, M = Co or Mn, and X = P or As) of the alluaudite structure type. |