Na ordering imprints a metallic kagomé lattice onto the Co planes of Na2/3CoO2 H. Alloul, I. R. Mukhamedshin, T. A. Platova and A. V. Dooglav EPL, 85 4 (2009) 47006 Published online: 04 March 2009 DOI: 10.1209/0295-5075/85/47006