R factor = 0.027; wR factor = 0.067; data-to-parameter ratio = 10.2. Ce2(SO4)3(H2O)4 was obtained hydrothermally from an aqueous solution of cerium(III) oxide, trimethylamine and sulfuric acid. The precision of the structure determination has been significantly improved compared with the previous result [Dereigne (1972). Bull. Soc. Fr. Mineral. Cristallogr. 95, 269– 280]. The coordination about the two Ce atoms is achieved by seven and six bridging O atoms from sulfate anions. Each S atom makes four S—O—Ce linkages through bridging O atoms. The coordination sphere of each Ce is completed by two water molecules, which act as terminal ligands. Related literatur
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