Abstract
A single crystal of NaMg(2)V(3)O(10) has been prepared by solid-state reaction at 1173 K. The [Mg(2)(V(3)O(10))](-) anions are built up from edge-sharing MgO(6) octa-hedra to form [Mg(4)O(18)] units, which are linked to each other by trivanadate groups (V(3)O(10)). The Na(+) ions are located in the tunnel space.