LuC2 crystallizes in the orthorhombic Immm space group. Lu(1) is bonded to eight equivalent C(1) atoms to form LuC8 hexagonal bipyramids that share corners with eight equivalent C(1)Lu4C square pyramids and edges with twelve equivalent Lu(1)C8 hexagonal bipyramids. C(1) is bonded to four equivalent Lu(1) and one C(1) atom to form distorted CLu4C square pyramids that share corners with four equivalent Lu(1)C8 hexagonal bipyramids, corners with sixteen equivalent C(1)Lu4C square pyramids, and edges with six equivalent C(1)Lu4C square pyramids.
LuC2 crystallizes in the orthorhombic Immm space group. Lu(1) is bonded to eight equivalent C(1) atoms to form LuC8 hexagonal bipyramids that share corners with eight equivalent C(1)Lu4C square pyramids and edges with twelve equivalent Lu(1)C8 hexagonal bipyramids. There are four shorter (2.45 Å) and four longer (2.52 Å) Lu(1)-C(1) bond lengths. C(1) is bonded to four equivalent Lu(1) and one C(1) atom to form distorted CLu4C square pyramids that share corners with four equivalent Lu(1)C8 hexagonal bipyramids, corners with sixteen equivalent C(1)Lu4C square pyramids, and edges with six equivalent C(1)Lu4C square pyramids. The C(1)-C(1) bond length is 1.31 Å.