HoCu2Si2 crystallizes in the tetragonal I4/mmm space group. Ho(1) is bonded in a 16-coordinate geometry to eight equivalent Cu(1) and eight equivalent Si(1) atoms. Cu(1) is bonded to four equivalent Ho(1), four equivalent Cu(1), and four equivalent Si(1) atoms to form a mixture of distorted corner, face, and edge-sharing CuHo4Cu4Si4 cuboctahedra. Si(1) is bonded in a 9-coordinate geometry to four equivalent Ho(1), four equivalent Cu(1), and one Si(1) atom.
HoCu2Si2 crystallizes in the tetragonal I4/mmm space group. Ho(1) is bonded in a 16-coordinate geometry to eight equivalent Cu(1) and eight equivalent Si(1) atoms. All Ho(1)-Cu(1) bond lengths are 3.17 Å. All Ho(1)-Si(1) bond lengths are 3.02 Å. Cu(1) is bonded to four equivalent Ho(1), four equivalent Cu(1), and four equivalent Si(1) atoms to form a mixture of distorted corner, face, and edge-sharing CuHo4Cu4Si4 cuboctahedra. All Cu(1)-Cu(1) bond lengths are 2.78 Å. All Cu(1)-Si(1) bond lengths are 2.37 Å. Si(1) is bonded in a 9-coordinate geometry to four equivalent Ho(1), four equivalent Cu(1), and one Si(1) atom. The Si(1)-Si(1) bond length is 2.34 Å.