Monocrystalline Mn:SrTiO3 was prepared from the compounds MnO2, TiO2, and SrCO3, which had equivalent weights of 2.52 g. Mn was doped in this sample at 60 mol%. The sample was heated half hour, and annealed at 1223 K ( 950 °C ). The sample had an orientation of (100). The study was performed at room temperature ( T = 300 K = 27 °C ). The structure of this crystal was investigated using X-ray diffraction and found to be cubic ( 3 ̅ ). The lattice parameter of the Mn:SrTiO3 crystal was 3.269 Å. The grain size of this crystal was magnified 5,000-100,000 times using scanning electron microscopy and found to be in range of 1.33µm-91.4nm.

-Mn:SrTiO3 monocrystal was prepared from these compounds MnO2, TiO2, SrCO3 by equivalent weight at 2.52g.Mn doped to sample by 60% mole. The sample under studied had size of 3mm thickness, and 12mm diameter at room temperature T=300K=27 0 C which has annealing temperature equal to1223K= 950 0 C for 24 h. The structure studied for this crystal by XRD way. The lattice constant for Mn: SrTiO3 crystal was calculated where a=3.269ᵒA. It structure was cubic type ( 3 ̅ ). The grain size of this crystal investigated by (SEM), it was 5µm at 5000 time magnified.