Abstract
The structural study of the compound Na4Co5,Al-63(0.91)(As0.06 [I], the first explored in the system, shows that the material forms a three dimensional framework with hexagonal tunnels running along di nicate along 10101 direction with tetragonal windows where Na+ cations are loc Complements, infrared (IR) and complex impedance (CI) spectroscopies studies were carrie Analysis by canner electronic microscope (S.E.N4) was f done for the state. The ionic onductivity mc urcmcnts wcrc performed on pellets of polycrystalline powders. The mon valent cations co duction pathways in the crystal bulks are simulated by means of the bond val nee model (DVS).