Although oxides containing cations exhibiting three oxidation states are rare, with only nine others reported, they have similarities to Ni 4 V 3 O 10 . The multiple state cations in most cases occupy multiple coordination environments in the structures with the only exception being Mn in the perovskite (La,Ca,K)MnO 3 . Notably, Ba 15 V 12 S 34 O 3 contains V 3+ on octahedral sites, V 4+ on a site distorted between square pyramidal ("V1a") and octahedral ("V1b") coordination, and V 5+ on a tetrahedral site. These coordination structures match the behavior of Ni 4 V 3 O 10 well. Also deserving special attention are Ni x Mn 3-x O 4 47 and Cu x Mn 3-x O 4 , 48 two occupationally disordered spinels, a structure type containing octahedral and tetrahedral coordination geometries.