Phase-equilibrium relationships in the systems CuO–P2O5 and Cu2O–P2O5

Abstract

The CuO–P₂O₅ system up to 50 moles % CuO shows compound formation at the ortho-, pyro-, and meta-phosphate compositions, while the Cu₂O–P₂O₅ systems shows only metaphosphate formation up to 33 moles % P₂O₅. The thermal behaviour of these systems has been studied in oxygen, air, and argon. The copper(II) compounds are unstable under all conditions studied, but the copper(I) compound melts congruently in argon at 1245°. X-Ray diffraction data are given.