title: Tris[tris-(1,10-phenanthroline-κN,N')iron(II)] dodeca-tungstoferrate dihydrate.
abstract: The title compound, [Fe(C(12)H(8)N(2))(3)](3)[FeW(12)O(40)]·2H(2)O, was prepared under hydro-thermal conditions. The discrete Keggin-type [FeW(12)O(40)](6-) heteropolyoxoanion has threefold symmetry, with the Fe(II) atom located on the threefold rotation axis. The central FeO(4) tetra-hedron in the anion shares its O atoms with four W(3)O(13) trinuclear units, each of which is made up of three edge-shared WO(6) octa-hedral units. The Fe(II) atom in the complex cation, viz [Fe(phen)(3)](2+) (phen is 1,10-phen-anthroline), shows a slightly distorted octa-hedral geometry defined by six N atoms from three phen ligands. The polyoxoanions pack together with the cations, with the disordered water mol-ecules located in voids; the site occupancy factor for each water O atom is 0.33.
authors.forename: Feng-Xia
authors.initials: FX
authors.lastname: Ma
authors.forename: Ya-Guang
authors.initials: YG
authors.lastname: Chen
authors.forename: Dong-Mei
authors.initials: DM
authors.lastname: Shi