抄録
A wet method was applied to prepare a spinel type MMn2O4 (M=Mn, Mg, Zn, Cu, Fe, Co, Ni and Cd) in alkaline water solution below 100°C. When M is Mn, Zn or Co, a stoichiometric spinel is prepared. When M is Mg, Fe or Cd, a partially substituted spinel is obtainable, and chemical compositions of the spinels which have the maximum foreign atom contents are given by Mg0.2Mn2.8O4, Fe0.4Mn2.6O4 and Cd0.6Mn2.4O4, respectively. Cu and Ni-substituted spinels are not obtainable by the method. Neutron diffraction measurements show that ZnMn2O4 and CoMn2O4 have their ionic distributions of (Zn2+) [Mn2]O4 and (Co0.842+Mn0.162+)[Co0.16II+Mn1.843+]O4, respectively.
