The Magnetic Investigation of Mn⁺⁺, Co⁺⁺, Ni⁺⁺, Cu⁺⁺ Ammine and Anhydrate Salts

Abstract

The object of this paper is to investigate how the magnetic interaction and the crystalline field depend on the number of coordinations in the complex salts. As the results of our measurements, it is found that the magnetic susceptibilities of Mn(NH₃)₆Cl₂, Mn(NH₃)₂Cl₂, Mn(NH₃)Cl₂, MnCl₂, Co(NH₃)₆Cl₂, Co(NH₃)₂Cl₂, Co(NH₃)Cl₂, CoCl₂; Ni(NH₃)₆Cl₂, Ni(NH₃)₂Cl₂, Ni(NH₃)Cl₂, NiCl₂; Cu(NH₃)₄SO₄·H₂O, Cu(NH₃)₂SO₄, CuSO₄ follow well the Curie-Weiss law in the temperature range from 90°K to 600°K. Any appreciable deviation from the Curie-Weiss law has not been observed, and it seems that the Curie constant C and the Weiss temperature θ in the equation χ_m=C⁄T+θ generally increase as the coordination number proceeds lower.