EuCo2Si2 crystallizes in the tetragonal I4/mmm space group. Eu(1) is bonded in a 16-coordinate geometry to eight equivalent Co(1) and eight equivalent Si(1) atoms. Co(1) is bonded in a 4-coordinate geometry to four equivalent Eu(1) and four equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to four equivalent Eu(1), four equivalent Co(1), and one Si(1) atom.
EuCo2Si2 crystallizes in the tetragonal I4/mmm space group. Eu(1) is bonded in a 16-coordinate geometry to eight equivalent Co(1) and eight equivalent Si(1) atoms. All Eu(1)-Co(1) bond lengths are 3.20 Å. All Eu(1)-Si(1) bond lengths are 3.09 Å. Co(1) is bonded in a 4-coordinate geometry to four equivalent Eu(1) and four equivalent Si(1) atoms. All Co(1)-Si(1) bond lengths are 2.26 Å. Si(1) is bonded in a 9-coordinate geometry to four equivalent Eu(1), four equivalent Co(1), and one Si(1) atom. The Si(1)-Si(1) bond length is 2.79 Å.