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Crystal structure of [M(H2O)3(GeW10)2]n– (n = 9 for M = CeIII, NdIII, ErIII; n = 8 for M = ZrIV) showing the polyhedral frontal view of the anion with the three aqua ligands bound to the corresponding metal. Blue and red spheres represent the M - and oxygen ions, respectively. Orange for GeIV and yellow polyhedra for {WO6}.
