57Fe Mössbauer spectroscopy predicts superstructure for K0.08[Cu(II)(N,N'app)Cl]2[Fe(III)(CN)6].0.92H3O.3H2O.

The compound [Cu(N, N' app)Cl](2)[Fe(CN)(6)](.)xH(2)O, with N, N' app being bis(N, N'-3-aminopropylpiperazine), was prepared and its structure determined by single crystal X-ray analysis, confirming a ratio of two copper complexes to one iron complex; Fe-57 Mossbauer spectra showed three quadrupole doublets typical of iron(III) low spin species which call for the presence of a superstructure.