Single crystals of the new compounds Sc3Al3O5C2 and ScAl2ONC were obtained by reacting Sc2O3 and C in an Al-melt at 1550 degrees C. Their crystal structures continue the row of transition metal oxide carbides with an ordered distribution of anions and cations with ScAlOC as the first representative. In the structure of Sc3Al3O5C2 (P6(3)/mmc, Z = 2, a = 3.2399(8) angstrom, c = 31.501(11) angstrom, 193 refl., 23 param., R-1(F) = 0.024, wR(2)(I) = 0.058) the anions form a closest packing with five layers of oxygen separated by two layers of carbon atoms. Sc is placed in octahedral voids and Al in tetrahedral voids thus forming layers of AlOC3 tetrahedra and ScC6- and ScO6-octahedra, respectively. Surprisingly the layers of Sc06 octahedra are connected by an additional layer of undistorted trigonal bipyramids AlO5. The structure of ScAl2ONC (space group R (3) over barm, Z =3, a = 3.2135(8) angstrom, c = 44.636(1) angstrom, 187 refl., 21 param., R-1(F) = 0.023, wR(2)(F-2) = 0.043) can directly be derived from the binary nitrides AIN (wurtzite-type) and ScN (rocksalt-type). The anions form a closest packing with alternating double layers of C and 0 separated by an additional layer of N. Again, Al and Sc occupy tetrahedral and octahedral voids, respectively. All compositions were confirmed by energy dispersive X-ray spectroscopy (EDXS) measurements on single crystals. According to band structure calculations Sc3Al3O5C2 is electron precise with a band gap of 0.3 eV. Calculations of charges and charge densities reveal that the mainly ionic bonding contains significant covalent contributions, too. As expected Sc and C show higher covalent shares than Al and O. The different coordinations of O, Al, and Sc are clearly represented in the corresponding p and d states.