Citation: Ulrich Kortz; Noha K. Al-Kassem; Masha G. Savelieff; Nisrine A. Al Kadi; Masahiro Sadakane (2001). Synthesis and Characterization of Copper-, Zinc-, Manganese-, and Cobalt-Substituted Dimeric Heteropolyanions, [(\a-XW~9~O~33~)~2~M~3~(H~2~O)~3~]^n-^ (n = 12, X = As^III^, Sb^III^, M = Cu^2+^, Zn^2+^; n = 10, X = Se^IV^, Te^IV^, M = Cu^2+^) and [(\a-AsW~9~O~33~)~2~WO(H~2~O)M~2~(H~2~O)~2~]^10-^ (M = Zn^2+^, Mn^2+^, Co^2+^). Inorganic Chemistry, 40, pp. 4742-4749.