DyMn2Si2 crystallizes in the tetragonal I4/mmm space group. Dy(1) is bonded in a 16-coordinate geometry to eight equivalent Mn(1) and eight equivalent Si(1) atoms. Mn(1) is bonded to four equivalent Dy(1) and four equivalent Si(1) atoms to form a mixture of corner, face, and edge-sharing MnDy4Si4 tetrahedra. Si(1) is bonded in a 9-coordinate geometry to four equivalent Dy(1), four equivalent Mn(1), and one Si(1) atom.
DyMn2Si2 crystallizes in the tetragonal I4/mmm space group. Dy(1) is bonded in a 16-coordinate geometry to eight equivalent Mn(1) and eight equivalent Si(1) atoms. All Dy(1)-Mn(1) bond lengths are 3.26 Å. All Dy(1)-Si(1) bond lengths are 3.00 Å. Mn(1) is bonded to four equivalent Dy(1) and four equivalent Si(1) atoms to form a mixture of corner, face, and edge-sharing MnDy4Si4 tetrahedra. All Mn(1)-Si(1) bond lengths are 2.38 Å. Si(1) is bonded in a 9-coordinate geometry to four equivalent Dy(1), four equivalent Mn(1), and one Si(1) atom. The Si(1)-Si(1) bond length is 2.46 Å.