HoCoC crystallizes in the tetragonal P4_2/mmc space group. Ho(1) is bonded in a 4-coordinate geometry to four equivalent C(1) atoms. Co(1) is bonded in a linear geometry to two equivalent C(1) atoms. C(1) is bonded to four equivalent Ho(1) and two equivalent Co(1) atoms to form a mixture of corner and edge-sharing CHo4Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-62°.
HoCoC crystallizes in the tetragonal P4_2/mmc space group. Ho(1) is bonded in a 4-coordinate geometry to four equivalent C(1) atoms. All Ho(1)-C(1) bond lengths are 2.48 Å. Co(1) is bonded in a linear geometry to two equivalent C(1) atoms. Both Co(1)-C(1) bond lengths are 1.81 Å. C(1) is bonded to four equivalent Ho(1) and two equivalent Co(1) atoms to form a mixture of corner and edge-sharing CHo4Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-62°.