ScCrC2 crystallizes in the hexagonal P6_3/mmc space group. Sc(1) is bonded to six equivalent C(1) atoms to form ScC6 octahedra that share corners with six equivalent C(1)Sc3Cr3C pentagonal bipyramids and edges with six equivalent Sc(1)C6 octahedra. Cr(1) is bonded in a 6-coordinate geometry to six equivalent C(1) atoms. C(1) is bonded to three equivalent Sc(1), three equivalent Cr(1), and one C(1) atom to form distorted CSc3Cr3C pentagonal bipyramids that share corners with three equivalent Sc(1)C6 octahedra, corners with nine equivalent C(1)Sc3Cr3C pentagonal bipyramids, edges with nine equivalent C(1)Sc3Cr3C pentagonal bipyramids, and  a faceface with one C(1)Sc3Cr3C pentagonal bipyramid. The corner-sharing octahedral tilt angles are 51°.
ScCrC2 crystallizes in the hexagonal P6_3/mmc space group. Sc(1) is bonded to six equivalent C(1) atoms to form ScC6 octahedra that share corners with six equivalent C(1)Sc3Cr3C pentagonal bipyramids and edges with six equivalent Sc(1)C6 octahedra. All Sc(1)-C(1) bond lengths are 2.40 Å. Cr(1) is bonded in a 6-coordinate geometry to six equivalent C(1) atoms. All Cr(1)-C(1) bond lengths are 2.02 Å. C(1) is bonded to three equivalent Sc(1), three equivalent Cr(1), and one C(1) atom to form distorted CSc3Cr3C pentagonal bipyramids that share corners with three equivalent Sc(1)C6 octahedra, corners with nine equivalent C(1)Sc3Cr3C pentagonal bipyramids, edges with nine equivalent C(1)Sc3Cr3C pentagonal bipyramids, and  a faceface with one C(1)Sc3Cr3C pentagonal bipyramid. The corner-sharing octahedral tilt angles are 51°. The C(1)-C(1) bond length is 1.52 Å.