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Chromium doped gallium oxynitrides having the wurtzite structure were prepared by ammonia nitridation of oxide precursors derived via the citrate route. The solid solution limits of less than 1 at.% Cr 3+ were confirmed by both XRD and EXAFS on the nitrided product at 750 ∘ C in the wurtzite-type crystal lattice. The doped product was paramagnetic with a small amount of an antiferromagnetic...
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