Abstract
The formation of a copper-cobaltite spinel, Cu 0.9Co 2.1O 4, during simultaneous decomposition of copper and cobaltous nitrates has been investigated by magnetic, EPR and DTA methods and diffusive reflectance spectroscopy. It has been shown that the spinel appears as a result of a solid-state reaction between basic copper nitrate and anhydrous cobaltous nitrate which are intermediate products of the decomposition of the initial nitrate salts. During the solid-state reaction, an intermediate pre-spinel structure containing copper ions in the tetrahedral sites only is formed. This structure transforms into a spinel with partially inverse distribution of the copper cations in the tetrahedral and octahedral sites.
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