Structural and vibrational properties of carbonophosphates: Na3MCO3PO4 (M = Mn, Fe, Co and Ni)

Abstract In this paper we present a Raman spectroscopy study of Na 3 MCO 3 PO 4 (M = Mn, Fe, Co e Ni) carbonophosphates. The insertion of different metals with distinct ionic radii in the MO 6 octahedra leads to changes in unit cell volume, thus leading to blueshifts in the energies of the Raman active modes. The experimental data are supported by lattice dynamic calculations and the vibrational properties of the carbonophosphates Na 3 MCO 3 PO 4 are properly described.