Valence States of Copper and Cation Distribution in Submicron Copper Ferrite Spinels CuxFe3-xO4(0≤x≤1) E. Kester, B. Gillot, P. Perriat, C. Villette, Ph. Tailhades et A. Rousset J. Phys. IV France, 07 C1 (1997) C1-261-C1-262 DOI: 10.1051/jp4:19971101