Ho2CoGe2 crystallizes in the monoclinic C2/m space group. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded in a 8-coordinate geometry to two equivalent Co(1), one Ge(2), and five equivalent Ge(1) atoms. In the second Ho site, Ho(2) is bonded in a 11-coordinate geometry to four equivalent Co(1), two equivalent Ge(1), and five equivalent Ge(2) atoms. Co(1) is bonded in a 10-coordinate geometry to two equivalent Ho(1), four equivalent Ho(2), one Ge(1), and three equivalent Ge(2) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to two equivalent Ho(2), five equivalent Ho(1), one Co(1), and one Ge(1) atom. In the second Ge site, Ge(2) is bonded in a 10-coordinate geometry to one Ho(1), five equivalent Ho(2), three equivalent Co(1), and one Ge(2) atom.
Ho2CoGe2 crystallizes in the monoclinic C2/m space group. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded in a 8-coordinate geometry to two equivalent Co(1), one Ge(2), and five equivalent Ge(1) atoms. Both Ho(1)-Co(1) bond lengths are 2.97 Å. The Ho(1)-Ge(2) bond length is 2.89 Å. There are a spread of Ho(1)-Ge(1) bond distances ranging from 2.97-3.06 Å. In the second Ho site, Ho(2) is bonded in a 11-coordinate geometry to four equivalent Co(1), two equivalent Ge(1), and five equivalent Ge(2) atoms. There are a spread of Ho(2)-Co(1) bond distances ranging from 2.94-3.16 Å. Both Ho(2)-Ge(1) bond lengths are 2.92 Å. There are a spread of Ho(2)-Ge(2) bond distances ranging from 2.95-3.18 Å. Co(1) is bonded in a 10-coordinate geometry to two equivalent Ho(1), four equivalent Ho(2), one Ge(1), and three equivalent Ge(2) atoms. The Co(1)-Ge(1) bond length is 2.46 Å. There are two shorter (2.37 Å) and one longer (2.60 Å) Co(1)-Ge(2) bond length. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to two equivalent Ho(2), five equivalent Ho(1), one Co(1), and one Ge(1) atom. The Ge(1)-Ge(1) bond length is 2.60 Å. In the second Ge site, Ge(2) is bonded in a 10-coordinate geometry to one Ho(1), five equivalent Ho(2), three equivalent Co(1), and one Ge(2) atom. The Ge(2)-Ge(2) bond length is 2.93 Å.