Charge disproportionation, everywhere! T. Takahashi, K. Hiraki, S. Moroto, N. Tajima, Y. Takano, Y. Kubo, H. Satsukawa, R. Chiba, H.M. Yamamoto, R. Kato and T. Naito J. Phys. IV France, 131 (2005) 3-8 Published online: 18 January 2006 DOI: 10.1051/jp4:2005131002