Ferromagnetic complex oxides of manganese with both cobalt and nickel in the crystallattice and having the ilmenite-type crystal structure

Claim 2

PROCESS FOR PREPARING A FERROMAGNETIC CRYSTALLINE COMPLEX OXIDE OF MANGANESE, COBALT AND NICKEL WHICH COMPRISES HEATING, AT A TEMPERATURE OF 500 TO 800*C. AND UNDER A PRESSURE OF 1000 TO 5000 ATMS., IN CONTACT WITH AN AQUEOUS MEDIUM, A MIXTURE OF MANGANESE DIOXIDE, NICKEL OXIDE AND COBALTOUS COBALTIC OXIDE IN WHICH THE MANGANESE DIOXIDE IS BETWEEN 15 AND 85 MOLE PERCENT OF THE TOTAL OXIDE MIXTURE AND IN WHICH THE NICKEL OXIDE AND THE COBALTOUS COBALTIC OXIDE EACH IS AT LEAST 0.1 MOLE PERCENT OF THE TOTAL OXIDE MIXTURE, AND SEPARATING AS THE RESULTING PRODUCT A CRYSTALLINE COMPLEX OXIDE OF MANGANESE WITH BOTH COBALT AND NICKEL IN THE CRYSTAL LATTICE CORRESPONDING TO THE FORMULA COXNI(1-X)MNO3 WHEREIN X IS BETWEEN 0.01 AND 0.99, CHARACTERIZED BY HAVING A DEFINITE SINGLE CURIE TEMPERATURE WITHIN THE RANGE OF 125* C. TO 158* C., HAVING A CRYSTAL STRUCTURE OF THE ILMENITE-TYPE, AND BY BEING FERROMAGNETIC.