ChemInform Abstract: 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