The article shows the possibility of synthesizing new double holmium-calcium tellurite by solid phase method from oxides of holmium (III), tellurium (IV) and calcium carbonate. X-ray analysis shows that tellurite HoCaTeO 4.5 crystallizes in the tetragonal structure. The parameters of the tellurite's unit cell, X-ray and pycnometric densities were determined by X-ray analysis as well.