Magnetic Spongelike Behavior of 3D Ferrimagnetic {[Mn<sup>II</sup>(imH)]<sub>2</sub>[Nb<sup>IV</sup>(CN)<sub>8</sub>]}<sub><i>n</i></sub> with <i>T</i><sub>c</sub> = 62 K PinkowiczDawid PodgajnyRobert BałandaMaria MakarewiczMagdalena GawełBartłomiej ŁasochaWiesław SiekluckaBarbara 2008 Fully reversible room temperature dehydration of 3D {Mn<sup>II</sup><sub>2</sub>(imH)<sub>2</sub>(H<sub>2</sub>O)<sub>4</sub>[Nb<sup>IV</sup>(CN)<sub>8</sub>]·4H<sub>2</sub>O}<sub><i>n</i></sub> (<b>1</b>; imH = imidazole) of <i>T</i><sub>c</sub> = 25 K results in the formation of 3D ferrimagnet {[Mn<sup>II</sup>(imH)]<sub>2</sub>[Nb<sup>IV</sup>(CN)<sub>8</sub>]}<sub><i>n</i></sub> (<b>2</b>), with <i>T</i><sub>c</sub> = 62 K, the highest ever known for octacyanometalate-based compounds. The dramatic magnetostructural modifications in <b>2</b> provide the first example of magnetic spongelike behavior in an octacyanometallate-based assembly.