The same, but different: Chromium(III) carbodiimide (see structure), the first ferromagnetic carbodiimide, was synthesized from CrCl3 and ZnNCN and was characterized by X-ray diffraction. Despite being isostructural with antiferromagnetic Cr2O3, Cr2(NCN)3 adopts a ferromagnetic ground state as shown by SQUID measurements and correlated density-functional theory. At low temperatures, the phase shows a slightly larger magnetization than maghemite.
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Tang et al. (2010) studied this question.
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