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A novel dimeric polyoxotungstate K4LaH[As2W20CuO67(H2O)3 ]Cl2·22.5H2O has been synthesized and characterized by IR, element analysis TG and cyclic voltammogram. The anion K4LaH[As2W20CuO67(H2O) 3]Cl2·22.5H2O can be characterized as two {AsIIIW9O33}9− moieties linked via a {Cu(OH)}, a {W(H2O)} and a {WO(H2O)} group which total coordination numbers are respectively 5, 5, 6. An additional lanthanide...
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