Structural and vibrational studies of NaZr2(AsO4)3

The structure of NaZr2(AsO4)3, which belongs to the Nasicon-type family, was solved by the Rietveld method in the R3̄c space group, from X-ray powder diffraction data. The hexagonal unit cell parameters are ah=9.1518(2) Å and ch=23.1097(4) Å. The structure is formed by a three-dimensional network of AsO4 tetrahedra and ZrO6 octahedra sharing corners. Na atoms occupy totally the M1 site. Raman and infrared spectra were recorded and assignments of the AsO stretching and bending modes were made.