TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Component: Titanium, zirconium, and hafnium in the composition formula are partially replaced by, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, scandium, yttrium, thorium, uranium, and/or lanthanides. The cobalt in the composition formula is partially replaced by, nickel, palladium, platinum, iron, ruthenium, and/or osmium. The antimony in the composition formula is partially replaced by, bismuth, lead, selenium, tellurium, germanium, and/or tin (preferably tellurium, germanium, or tin).Preferred Condition: The titanium, zirconium, and hafnium are partially replaced at a ratio of less than or equal to30 atom% of the total quantity of titanium, zirconium, and hafnium. The cobalt is partially replaced at a ratio of less than or equal to30 atom% of cobalt. The antimony is partially replaced at a ratio of less than or equal to30 atom% of antimony.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Component: Titanium, zirconium, and hafnium in the composition formula are partially replaced by, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, scandium, yttrium, thorium, uranium, and/or lanthanides. The cobalt in the composition formula is partially replaced by, nickel, palladium, platinum, iron, ruthenium, and/or osmium. The antimony in the composition formula is partially replaced by, bismuth, lead, selenium, tellurium, germanium, and/or tin (preferably tellurium, germanium, or tin).Preferred Condition: The titanium, zirconium, and hafnium are partially replaced at a ratio of less than or equal to30 atom% of the total quantity of titanium, zirconium, and hafnium. The cobalt is partially replaced at a ratio of less than or equal to30 atom% of cobalt. The antimony is partially replaced at a ratio of less than or equal to30 atom% of antimony. Preferred Definitions:    a1=greater than 0.2 but less than 0.8, preferably 0.3;    b1, c1=greater than 0.2 but less than 0.8, preferably 0.35;    x, y=33-34.    EXAMPLE - A thermoelectric material was prepared from 99.9% pure titanium, 99.9% pure zirconium, 99.9% pure hafnium, 99.99% pure cobalt, and 99.99% pure antimony as raw materials. The raw materials were respectively weighed to meet a composition formula of (Ti0.3Zr0.35Hf0.35)CoSb. The raw materials were mixed and placed in a water-cooled copper hearth. The hearth was placed inside an arc furnace. The interior of the hearth was evacuated to a vacuum degree of 2x10-3 Pa. High purity argon (99.999% pure) was introduced into the hearth up to -0.04 MPa to form a reduced-pressure argon atmosphere to subject the raw materials to arc melting and obtain a metallic lump. The lump was pulverized and molded using a mold having an inner diameter of 20 mm under a pressure of 50 MPa. The molded body was placed inside a carbon mold having an inner diameter of 20 mm and was subjected to a pressure sintering for 1 hour in an argon atmosphere at 80 MPa and 1200degreesC, obtaining a disc-like sintered body having a diameter of 20 mm. The sintered body was examined using a powder X-ray diffractometer and showed a main phase having a magnesium-silver-arsenic-type crystal structure.