Ho2AlSi2 crystallizes in the orthorhombic Immm space group. Ho(1) is bonded in a 6-coordinate geometry to six equivalent Si(1) atoms. Al(1) is bonded in a 4-coordinate geometry to four equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to six equivalent Ho(1), two equivalent Al(1), and one Si(1) atom.
Ho2AlSi2 crystallizes in the orthorhombic Immm space group. Ho(1) is bonded in a 6-coordinate geometry to six equivalent Si(1) atoms. There are four shorter (2.98 Å) and two longer (2.99 Å) Ho(1)-Si(1) bond lengths. Al(1) is bonded in a 4-coordinate geometry to four equivalent Si(1) atoms. All Al(1)-Si(1) bond lengths are 2.61 Å. Si(1) is bonded in a 9-coordinate geometry to six equivalent Ho(1), two equivalent Al(1), and one Si(1) atom. The Si(1)-Si(1) bond length is 2.37 Å.