SILVER INSERTION MODE IN BETA-AGXV2O5 TUNNEL STRUCTURE

The beta-AgxV2O5 phase of silver vanadate has a large homogeneity rang e, 0.29 less-than-or-equal-to x less-than-or-equal-to 0.41; the (V2O5) , network of its crystal structure is typical of the beta phase of the vanadium oxide bronzes with its oxygenated tunnels running along [010 ]. Ag atoms are inserted in a novel manner, being distributed onto two distinct crystallographic sites, which explains the overstepping of t he theoretical boundary limit of the beta phases, x = 0.33.