Figure 1.

Polyhedral representation of {X₃W₄₃} (X = Sb^III and Bi^III) showing the polyanion in a frontal view (A) as well as the central {W₃O₁₃} moiety (B) which is connected to a defect pentagonal {(W^VIO₇)W^VI₄} unit (C). Six single {WO₆} linkers (D) complete the structure by connecting the {(W^VIO₇)W^VI₄} unit to {XW₉} building blocks. Black and red spheres represent the X = Sb^III and Bi^III and oxygen ions, respectively. Magenta, ice gray, turquoise, and royal blue transparent polyhedra represent the {XW₉} building blocks, the {W₃O₁₃} unit, single {WO₆} linkers, and {(W^VIO₇)W^VI₄} unit, respectively.