[en] The composition of the products of carbothermal reduction of Sc₂O₃ is examined by X-ray diffraction and chemical analysis and by the hydrolysis method. At pressures of 10^-2-1 Pa, the reaction starts in the temperature region of 1000 - 1200 ^oC. The first product is Sc₂OC of NaCl type; at 1 Pa and 1400 - 1500 ^oC this substance is formed quantitatively (according to stoichiometry) within 50 - 100 h, repeated homogenization, however, is necessary, or else Sc₂OC reacts locally with Sc₂O₃ giving Sc₂O_1+xC_1-x. The lattice parameter of Sc₂OC in the presence of Sc₁₅C₁₉ is 457.6₃pm. At temperatures above 1500 ^oC, Sc₁₅C₁₉ is incompletely formed by subsequent reaction with carbon. The product melts at cca. 1800 ^oC; carbon dissolves and the final composition approaches ScC₂. Carbon separates during solidification. The phase fractionsin the products are affected by evaporation, the vapour pressures above both Sc₂OC and Sc₁₅C₁₉ being comparable with the pressure requisite for the carboreduction process. The results are discussed with respect to the often ambiguous published data. (Author)