Neutron and X-ray diffraction studies on powders and single crystals of compounds structurally related to Prussian Blue:: CsMnIICrIII(CN)6•D2O, NMe4MnII(Cr0,06Mn0,94) III(CN)6•8H2O, NMe4MnIICoIII(CN)6•8H2O, Mn3II[MnIII(CN)6]2•15H2O and Cd3[FeIII(CN)6]2•15H2O

The results of a Rietveld refinement of CsMnCr(CN)(6). D2O neutron powder data (a = 1083.3(1) pm, F (4) over bar 3m, Z = 4) and of a neutron single crystal structure refinement of tetragonal NMe4MnII (Cr0,06Mn0,94)(III)(CN)(6). 8H(2)O (a = 1065.8(21), c = 1064.6(26) pm, P4/n, Z = 2) at ambient temperature are reported. Single crystal X-ray analyses of the isostructural octahydrate NMe4MnCo(CN)(6). 8H(2)O (a = 1062.1 (1), c = 1046.2(1) pm) and of gel-grown crystals of cubic Mn-3(II)[Mn-III(CN)(6)](2). 15H(2)O (a = 1062.6(3) pm, Fm (3) over bar m, Z = 4/3) and Cd-3[Fe(CN)(6)](2). 15H(2)O (a = 1067.7(3) pm) were performed as well. The latter "Prussian Blues" are highly disordered and intermediate with respect to cyano-bridging between the above three-dimensional cesium and one-dimensional tetramethylammonium compounds.