CeCo2BSi crystallizes in the tetragonal I4mm space group. Ce(1) is bonded to four equivalent Co(1), four equivalent B(1), and four equivalent Si(1) atoms to form a mixture of distorted face and edge-sharing CeCo4Si4B4 cuboctahedra. Co(1) is bonded in a 6-coordinate geometry to two equivalent Ce(1), two equivalent B(1), and two equivalent Si(1) atoms. B(1) is bonded in a 4-coordinate geometry to four equivalent Ce(1), four equivalent Co(1), and one Si(1) atom. Si(1) is bonded in a 9-coordinate geometry to four equivalent Ce(1), four equivalent Co(1), and one B(1) atom.
CeCo2BSi crystallizes in the tetragonal I4mm space group. Ce(1) is bonded to four equivalent Co(1), four equivalent B(1), and four equivalent Si(1) atoms to form a mixture of distorted face and edge-sharing CeCo4Si4B4 cuboctahedra. All Ce(1)-Co(1) bond lengths are 2.87 Å. All Ce(1)-B(1) bond lengths are 2.92 Å. All Ce(1)-Si(1) bond lengths are 2.98 Å. Co(1) is bonded in a 6-coordinate geometry to two equivalent Ce(1), two equivalent B(1), and two equivalent Si(1) atoms. Both Co(1)-B(1) bond lengths are 2.07 Å. Both Co(1)-Si(1) bond lengths are 2.26 Å. B(1) is bonded in a 4-coordinate geometry to four equivalent Ce(1), four equivalent Co(1), and one Si(1) atom. The B(1)-Si(1) bond length is 2.69 Å. Si(1) is bonded in a 9-coordinate geometry to four equivalent Ce(1), four equivalent Co(1), and one B(1) atom.