  A novel alluaudite type vanadate has been successfully synthesized in its
single crystal and polycrystalline forms. Its crystal structure was determined
by means of X ray diffraction measurements. This new vanadate crystallizes in
monoclinic system. The crystal structure of this vanadate displays an open
transition metals based framework enclosing two kind of tunnels where the
sodium cations are located. Moreover, the purity of the obtained powder was
confirmed by X ray powder diffraction analysis. Furthermore, this new vanadate
was characterized by scanning electron microscopy, Infrared spectroscopy and by
magnetic measurements. The magnetic susceptibility showed the antiferromagnetic
behavior of this vanadate with negatve Curie- Weiss temperature consistently
with the expected magnetic interactions between iron cations.
