The inventive oxide material for a molten-core catcher of a nuclear reactor comprises Fe>2<O>3< and /or Fe>3<O>4< and Al>2<O>3<. The content of Al>2<O>3< and /or Fe>3<O>4 <ranges from 46 to 80 mass %, and Al>2<O>3 <from 16 to 50 mass> <%. Said material can also contain up to 4 mass % of SiO2, preferably from 1 to 4 mass %. The material can be embodied in the form of a ceramic material or concrete which additionally contains up to 20 mass % of cement binder.; The inventive oxide material for a molten-core catcher of a nuclear reactor comprises Fe2O3 and /or Fe3O4 and Al2O3. The content of Al2O3 and /or Fe3O4 ranges from 46 to 80 mass %, and Al2O3 from 16 to 50 mass %. Said material can also contain up to 4 mass % of SiO2, preferably from 1 to 4 mass %. The material can be embodied in the form of a ceramic material or concrete which additionally contains up to 20 mass % of cement binder.