The old but evergreen family of bimetallic oxalates still offers innovative and intetesting results. When (Me4N)(3)[Cr(ox)(3)]center dot 3H(2)O is reacted with Mn-II ions in a noriaqueous solvent, A novel three-dimensional magnet Of the formula [N(CH3)(4)](6)[Mn(3)Ct(4)(ox)(12)]center dot 6CH(3)OH is obtained instead of the one-dimensional compound obtained in water. This new material exhibits an unprecedented stoichiometry with a binodal (3,4) net topology and the highest critical temperature (T-C = 7 K) obsetved so fat in a iananese-chromium oxalate based magnet.