<p>Sc(0,1,2,3&#xa0;mol%): Ce: Fe: LiNbO₃ crystals were grown by conventional Czochralski method. The X-ray diffraction is used to determine lattice constants and analyze the internal structure of crystals. The lattice size was found to increase first and then decrease, and the doping elements do not alter the crystal structure. The concentrations of Sc³⁺, Ce⁴⁺, and Fe³⁺ ions in the crystals were measured using ICP-AES. With the increase of Sc³⁺ concentration in the melt, the effective segregation coefficient of Sc³⁺ was found to decrease, while the effective segregation coefficient of Ce⁴⁺ and Fe³⁺ increased. The birefringence gradient of the ScCeFe-3 sample measured using the birefringence gradient method was 3.3 × 10⁻⁵ ∆R/cm⁻¹, which was the best optical homogeneity.</p>