The chemical thermodynamic data of fission product compounds found in literature are surveyed. The data of S°, -ΔHf°, -ΔSf° and -ΔGf° at 298.15K are tabulated for compounds of uranates, molybdates and chromates of cesium, rubidium and barium. The phase relations of Cs-U-O, Cs-Mo-O and Cs-Cr-O systems at 1, 000K are also shown in the oxygen potential-cesium potential diagram.