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The structure of NaZr 2 (AsO 4 ) 3 , which belongs to the Nasicon-type family, was solved by the Rietveld method in the R3c space group, from X-ray powder diffraction data. The hexagonal unit cell parameters are a h =9.1518(2)A and c h =23.1097(4)A. The structure is formed by a three-dimensional network of AsO 4 tetrahedra and ZrO 6 octahedra...