White powder, molecular weight 441.89, relative density 8.2, melting point 1872℃±10℃. Insoluble in water and other acids, soluble in hydrofluoric acid of molten potassium bisulfate. Supply purity of 99.99% and 99.9%, used to pull lithium tantalate single crystal and manufacture high refraction low dispersion special optical glass, chemical can be used as a catalyst, is the raw material for the growth of lithium tantalate. Lithium tantalate is an important piezoelectric, thermoelectric and nonlinear optical material, and has important applications in laser and surface wave technology.