HoCo5 crystallizes in the hexagonal P6/mmm space group. Ho(1) is bonded in a 18-coordinate geometry to six equivalent Co(1) and twelve equivalent Co(2) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 9-coordinate geometry to three equivalent Ho(1) and six equivalent Co(2) atoms. In the second Co site, Co(2) is bonded to four equivalent Ho(1), four equivalent Co(1), and four equivalent Co(2) atoms to form a mixture of edge, face, and corner-sharing CoHo4Co8 cuboctahedra.
HoCo5 crystallizes in the hexagonal P6/mmm space group. Ho(1) is bonded in a 18-coordinate geometry to six equivalent Co(1) and twelve equivalent Co(2) atoms. All Ho(1)-Co(1) bond lengths are 2.83 Å. All Ho(1)-Co(2) bond lengths are 3.14 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 9-coordinate geometry to three equivalent Ho(1) and six equivalent Co(2) atoms. All Co(1)-Co(2) bond lengths are 2.41 Å. In the second Co site, Co(2) is bonded to four equivalent Ho(1), four equivalent Co(1), and four equivalent Co(2) atoms to form a mixture of edge, face, and corner-sharing CoHo4Co8 cuboctahedra. All Co(2)-Co(2) bond lengths are 2.45 Å.