. "cobalt(II/III) oxide" . "cobalt(II) dicobalt(III) oxide" . "Cobalt(II,III) oxide" . "cobalt oxide, cobalt(II,III) oxide, cobaltosic oxide, tricobalt tetroxide" . . "Co₃O₄" . . . . "cobalt tetroxide" . . "Cobalt(II,III) oxide" . "cobalt(II,III) oxide" . . "cobalt oxide" . . .