Ammonium bis­(tetra­ethyl­ammonium) hexa­cyanido­ferrate(III) trihydrate

In the structure of the title salt, (NH₄)(C₈H₂₀N)₂[Fe(CN)₆]·3H₂O, the O atom of one of the water mol­ecules shares its crystallographic site with the N atom of the ammonium cation in a 1:1 ratio. The second O atom from the two crystallographically independent water mol­ecules is disordered over two positions separated by 0.551 (1) Å. The water mol­ecules and ammonium cations form tetra­meric hydrogen-bonded units that, along with the complex anion, form the hydro­philic part of the structure. The hydro­phobic part of the structure, represented by the tetra­ethyl­ammonium cation, is located in cube-like cavities of the hydro­philic framework.