Results of dielectric measurements conducted on lanthanum heptamolybdate grown by a gel technique employing the system La(NO 3 )-MoO 3 -NH 4 OH-HNO 3 -Na 3 SiO 3 are presented. The variations of the dielectric constant ε , dielectric loss tan δ and conductivity σ with the temperature and frequency are critically analyzed. The dielectric constant increases with temperature at lower frequencies (10 3 Hz), reaching a maximum value of 320 at 125 °C, after which it abruptly decreases. The dielectric loss tan B and conductivity σ show both a temperature as well as a frequency dependence. The sharp increase in ε with temperature is attributed to total polarization resulting from a space charge effect. The functional relationship between the dielectric constant, conductivity and temperature is determined by fitting the observed data with the respective polymeric expressions of the typeε=a 0 + a 1 T 2 -ln σ = a + b(T - T 0 ) 2 . The non-linearities and anomalous behaviour of the dielectric constant near the transition temperature, supported by hysteresis studies, indicate the possibility of these materials being ferroelectric.