CaC2 crystallizes in the hexagonal P6/mmm space group. Ca(1) is bonded to twelve equivalent C(1) atoms to form a mixture of distorted edge and face-sharing CaC12 cuboctahedra. C(1) is bonded in a 9-coordinate geometry to six equivalent Ca(1) and three equivalent C(1) atoms.
CaC2 crystallizes in the hexagonal P6/mmm space group. Ca(1) is bonded to twelve equivalent C(1) atoms to form a mixture of distorted edge and face-sharing CaC12 cuboctahedra. All Ca(1)-C(1) bond lengths are 2.64 Å. C(1) is bonded in a 9-coordinate geometry to six equivalent Ca(1) and three equivalent C(1) atoms. All C(1)-C(1) bond lengths are 1.60 Å.