Ceramics with composition belonging to the SrSnO 3 –NaNbO 3 system were sintered in the temperature range 1100–1350°C. The symmetry, dielectric properties and Raman spectroscopy were investigated. X-ray diffraction results demonstrate that a region with the cubic or tetragonal phases lies in the composition range x<0.89 and x≥0.89, respectively.The thermal behavior of the dielectric permittivity suggests the existence of two phases: cubic—paraelectric and tetragonal—ferroelectric or ferroelectric relaxor.The Raman spectra was recorded at room temperature and their evolution related to the chemical composition.