HoCo2Ge2 crystallizes in the tetragonal I4/mmm space group. Ho(1) is bonded in a 16-coordinate geometry to eight equivalent Co(1) and eight equivalent Ge(1) atoms. Co(1) is bonded to four equivalent Ho(1) and four equivalent Ge(1) atoms to form a mixture of distorted face, corner, and edge-sharing CoHo4Ge4 tetrahedra. Ge(1) is bonded in a 9-coordinate geometry to four equivalent Ho(1), four equivalent Co(1), and one Ge(1) atom.
HoCo2Ge2 crystallizes in the tetragonal I4/mmm space group. Ho(1) is bonded in a 16-coordinate geometry to eight equivalent Co(1) and eight equivalent Ge(1) atoms. All Ho(1)-Co(1) bond lengths are 3.18 Å. All Ho(1)-Ge(1) bond lengths are 3.05 Å. Co(1) is bonded to four equivalent Ho(1) and four equivalent Ge(1) atoms to form a mixture of distorted face, corner, and edge-sharing CoHo4Ge4 tetrahedra. All Co(1)-Ge(1) bond lengths are 2.31 Å. Ge(1) is bonded in a 9-coordinate geometry to four equivalent Ho(1), four equivalent Co(1), and one Ge(1) atom. The Ge(1)-Ge(1) bond length is 2.56 Å.