The yttrium sodium silicate apatite doped with terbium ions viz., Y9-xNa(SiO4)6O2: xTb (0 ≤ x ≤ 0.2 mol%) was synthesized through auto combustion method. The formation of apatite with a hexagonal structure belonging to space group p63/m was verified using PXRD analysis. The SEM micrographs show the formation of crystals, random in shape and irregular in distribution. The presence of chemical bonds between the Si–O elements of the compounds is confirmed from the analysis of transmission spectra obtained through FTIR spectroscopy. The frequency and temperature (102 Hz – 102 kHz) dependent dielectric parameters were obtained and analyzed. The dielectric constant (ɛ′) and dielectric loss (ɛ′′) showed decreasing trend with increasing values of external field frequencies due to a reduction in space charge polarization. Over a wide range of temperature and frequency, low values of ɛ′′ are sustained. The alternating conductivity showed dispersion with increasing values of frequency. The impedance analysis confirmed NTCR properties of compounds. These compounds can be utilized in electrical devices as loss components, and capacitors, etc.