Diammonium aqua­(ethyl­ene­diamine­tetra­acetato)iron(II) trihydrate

In the title compound, (NH(4))(2)[Fe(C(10)H(12)N(2)O(8))(H(2)O)]·3H(2)O, the Fe(II) center is in a distorted penta­gonal-bipyramidal geometry. Two carboxyl­ate O and two N atoms from the ethyl­enediaminetetra­acetate (EDTA) ion and one O atom from coordinated water comprise the equatorial plane. Two other carboxyl­ate O atoms from the EDTA ion occupy the apical sites. Both ammonium cations and all water mol­ecules function as hydrogen-bond donors, and ten N—H⋯O and nine O—H⋯O hydrogen bonds form a three-dimensional network between the complex anions, cations and the water mol­ecules.