μ-Oxido-bis­[bis­(phenanthroline-κ(2) N,N′)(sulfato-κO)iron(III)] octa­hydrate

The title complex, [Fe(2)O(SO(4))(2)(C(12)H(8)N(2))(4)]·8H(2)O, contains two unique Fe(III) cations, one oxide anion, four 1,10-phenanthroline (phen) ligands, two coordinated sulfate anions and eight lattice water mol­ecules. Each Fe(III) ion has an approximate octa­hedral geometry, coordinated by four N atoms from two phen mol­ecules, two O atoms from oxide and sulfate anions, respectively. The parallel phen mol­ecules form two-dimensional supermolecules through π–π stacking inter­actions [centroid–centroid distances = 3.684 (3), 3.711 (3), 3.790 (3), 3.847 (3), 3.746 (3), 3.732 (3) and 3.729 (3) Å]. This architecture is further stabilized by O—H⋯O hydrogen bonds involving the lattice water mol­ecules and sulfate O atoms.