Structure, Intrinsic properties and Vibrational Spectra of Pr(Mg(1/2)Sn(1/2))O(3) Ceramic Crystal

Pr(Mg(1/2)Sn(1/2))O(3) (PMS) ceramic was prepared through a conventional solid-state reaction method. Crystal structure was investigated through X-ray diffraction (XRD), which certificates that the main phase is PMS with monoclinic P2 (1)/n1 symmetry. Lattice vibrational modes were obtained through Raman scattering spectroscopy and Fourier transform far-infrared reflection spectroscopy. The Raman spectrum active modes were assigned and illustrated, respectively, and then fitted with Lorentzian function. The four modes within the range of 110–200 cm(−1) are derived from the F (2g) vibrations (A-site cations), and the other three modes (300–430 cm(−1)) are derived from the F (2g) vibrations (B-site cations).The mode with highest frequency above 650 cm(−1) is attributed to A (1g)-like mode that corresponds to the symmetric breathing of oxygen octahedral. The far-infrared spectrum with seven infrared active modes was fitted using four-parameter semi-quantum models to calculate intrinsic properties (permittivity and loss). F (2u) ((2)) yielded the greatest contribution to dielectric constant and loss, which is mainly performed as the inverted translational vibration of Pr-MgO(6) octahedron.