Close inspection of the Zr(EA)4 coordination environment in the various MOFs reveals distinct differences between MOFs even with the same Zr(IV) coordination number and coordination polyhedron. The local structures of the various Zr(EA)4 in MOFs with square antiprism ZrO8 coordination polyhedra are compared in Fig. . Despite all having square antiprism coordination geometries, the orientations of the ellagate ligands differ, resulting in numerous distinct isomers of Zr(EA)4.