LaRh2Si2 crystallizes in the tetragonal I4/mmm space group. La(1) is bonded in a 16-coordinate geometry to eight equivalent Rh(1) and eight equivalent Si(1) atoms. Rh(1) is bonded to four equivalent La(1) and four equivalent Si(1) atoms to form a mixture of distorted face, corner, and edge-sharing RhLa4Si4 tetrahedra. Si(1) is bonded in a 9-coordinate geometry to four equivalent La(1), four equivalent Rh(1), and one Si(1) atom.
LaRh2Si2 crystallizes in the tetragonal I4/mmm space group. La(1) is bonded in a 16-coordinate geometry to eight equivalent Rh(1) and eight equivalent Si(1) atoms. All La(1)-Rh(1) bond lengths are 3.31 Å. All La(1)-Si(1) bond lengths are 3.21 Å. Rh(1) is bonded to four equivalent La(1) and four equivalent Si(1) atoms to form a mixture of distorted face, corner, and edge-sharing RhLa4Si4 tetrahedra. All Rh(1)-Si(1) bond lengths are 2.41 Å. Si(1) is bonded in a 9-coordinate geometry to four equivalent La(1), four equivalent Rh(1), and one Si(1) atom. The Si(1)-Si(1) bond length is 2.68 Å.