SINGLE-CRYSTAL LOW-TEMPERATURE MAGNETIZATION STUDIES OF CS2K[MN(CN)6]

The magnetisation in single monoclinic crystals of Cs2K[Mn(CN)6] has b een measured from 2 to 300 K and from 0.5 to 5 T along the [100], [010 ], [001] and [011] crystal directions. The data, with no symmetry appr oximations, can be fitted by the same general ligand-field model that was used for Cs2K[Fe(CN)6]. Hardly significant changes in the already small ligand-field parameters and appropriate changes in the metal par ameters were required. Such approximate transferability of a ligand-fi eld model, between 3d4 and 3d5 low-spin systems which have very differ ent magnetic behaviour, encourages belief in the utility and reality o f ligand-field modelling.