The phase group and structure properties of La(Mg1/2Ti1/2)O3 (LMT) ceramics, prepared via the mixed oxide route, were examined in this research. A single-phase La(Mg1/2Ti1/2)O3 ceramic were produced at different sintering temperature from 1250��C to 1675��C. The heating rate was 25 �� C to the sintering temperature and the cooling rate from 2 �� C per minute to room temperature. The XRD analysis determined that LMT ceramics have a cubic crystal structure with a lattice parameter a = 0.392 nm. The theoretical density of this ceramics is 6.0846 g/cm3. These materials must be sintered from 1550- 1675��C to achieve a sintering density of about 99% of theoretical density. At a temperature lower than 1500��C a density was 93% of theoretical density. The temperature coefficient of resonant frequency for LMT was -72 ppm/��C, and the Quality factor was 34000 at a frequency of 8.07 GHz