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Maghemite (γ-Fe 2 O 3 ) nanopowder was prepared by the thermal decomposition of Fe–urea complex ([Fe(CON 2 H 4 ) 6 ](NO 3 ) 3 ) that was synthesized by various routes including wet and dry synthetic methods. Then the effects of synthetic routes of the [Fe(CON 2 H 4 ) 6 ](NO 3 ) 3 on resulting iron oxide...