Oxide chemistry. Part II. Ternary oxides containing copper in oxidation states-I, -II, -III, and -IV

Abstract

We report an investigation of the preparation, structure, and magnetic properties of ternary oxides containing copper in oxidation states-I, -II, -III, and -IV. The compounds described are: ACuO₂(A = Al or Ga); AcuCo₂(A = Ca, Sr, or Ba), A₂Cu₂O₅(A = Sc, Y, Bi, or In), and A₂CuO₄(A = La, Al, or Ga); BaCuO_2·5, ACuO₃(A = Y or La); and BaCuO_2·63 which is the only phase containing copper(IV) which could be obtained. X-Ray pcv.der patterns have been indexed wherever possible and magnetic-susceptibility measurements from 80 to 300 K are interpreted for all paramagnetic species.