HoCoC2 crystallizes in the orthorhombic Amm2 space group. Ho(1) is bonded in a 8-coordinate geometry to eight equivalent C(1) atoms. Co(1) is bonded in a 4-coordinate geometry to four equivalent C(1) atoms. C(1) is bonded in a 7-coordinate geometry to four equivalent Ho(1), two equivalent Co(1), and one C(1) atom.
HoCoC2 crystallizes in the orthorhombic Amm2 space group. Ho(1) is bonded in a 8-coordinate geometry to eight equivalent C(1) atoms. There are four shorter (2.61 Å) and four longer (2.63 Å) Ho(1)-C(1) bond lengths. Co(1) is bonded in a 4-coordinate geometry to four equivalent C(1) atoms. There are two shorter (1.92 Å) and two longer (1.96 Å) Co(1)-C(1) bond lengths. C(1) is bonded in a 7-coordinate geometry to four equivalent Ho(1), two equivalent Co(1), and one C(1) atom. The C(1)-C(1) bond length is 1.38 Å.