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5. First reported as an octatungstate [R. Ripan and A. Botar,Rev. Roum. Chirp., 15, 1529 (1970);16, 807 (1971)1 but later shown to be isomorphous with [CeW10O36]8?] L.C.W. Baker, C. O. Quicksall and I. Todorut, personal communication, 19731.