A series of new oxides Li(4-x)/3Ti(5-2x)/3MnxO4 (0.1 <= x <= 0.9) have been synthesized by solid state reactions and characterized by thermal analysis and X-ray and neutron diffraction. In all phases, Li+ cations mainly occupy tetrahedral sites and transition metals cations are located on the octahedral ones. These phases show a structural disorder-order transition associated to the proportion of manganese in the samples and to its oxidation state. All these factors have a marked influence on the electrochemical properties and the phase x = 0.1 shows the best characteristics to be used as anode in a solid state battery. (C) 2013 Elsevier B.V. All rights reserved.