Structure and magnetic properties of gadolinium hexacyanoferrate Prussian blue analogue

The structure of gadolinium, hexacyanoferrate Prussian blue analogue Gd[Fe(CN)(6)] . 4H(2)O was investigated by powder x-ray diffraction technique using the Rietveld structure refinement method. Obtained results have confirmed pseudohexagonal symmetry of the compound with lattice parameters a = 7.394(4) Angstrom, b = 12.836(6) Angstrom and c = 13.666(6) Angstrom. The negative value of IS in Mossbauer spectrum is due to the presence of cyano, groups. Magnetic susceptibility above T = 20 K obeys Curie-Weiss law. Value of effective magnetic moment mu(eff) = 7.19 mu(B) is lower than the expected value for a free Gd3+ ion (mu(eff) = 7.94 mu(B)). Differences between FC and ZFC behavior of magnetic susceptibility indicate a spin-glass like magnetic arrangement. Our results support prediction that the material orders ferrimagnetically below T-c = 2.3 K.