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Four isostructural lanthanide compounds formulated as {[Ln4(μ3-OH)4(L-asp)3- (H2O)10](ClO4)5·10H2O}n (Ln=Nd (1), Sm (2), Eu (3), Gd (4); asp=aspartic acid) were synthe- sized by a conventional solution reaction. Their structures were characterized by