[en] Formation of individual congruently melting at 1205 deg C chemical compound of 2CdWO₄·Ho₂(WO₄)₃ composition, crystallizing in tetragonal syngony (sheelite structural type, sp.gr. I 4_1/a was established in CdWO₄-Ho₂(WO₄)₃ system. The region of existence of solid solutions on the basis of holmium tungstate, crystallizing in rhombic syngony (structural type of scandium tungstate, sp.gr. P_nca), was also revealed in the system. Concentration range of solid solution formation doesn't exceed ≅6% at 1100 deg C