DyRhCoSi2 crystallizes in the tetragonal I-4m2 space group. Dy(1) is bonded in a 16-coordinate geometry to four equivalent Rh(1), four equivalent Co(1), and eight equivalent Si(1) atoms. Rh(1) is bonded to four equivalent Dy(1), four equivalent Co(1), and four equivalent Si(1) atoms to form distorted RhDy4Co4Si4 tetrahedra that share corners with four equivalent Co(1)Dy4Si4Rh4 cuboctahedra, corners with twelve equivalent Rh(1)Dy4Co4Si4 tetrahedra, edges with two equivalent Co(1)Dy4Si4Rh4 cuboctahedra, faces with four equivalent Co(1)Dy4Si4Rh4 cuboctahedra, and faces with four equivalent Rh(1)Dy4Co4Si4 tetrahedra. Co(1) is bonded to four equivalent Dy(1), four equivalent Rh(1), and four equivalent Si(1) atoms to form CoDy4Si4Rh4 cuboctahedra that share corners with twelve equivalent Co(1)Dy4Si4Rh4 cuboctahedra, corners with four equivalent Rh(1)Dy4Co4Si4 tetrahedra, edges with two equivalent Rh(1)Dy4Co4Si4 tetrahedra, faces with four equivalent Co(1)Dy4Si4Rh4 cuboctahedra, and faces with four equivalent Rh(1)Dy4Co4Si4 tetrahedra. Si(1) is bonded in a 9-coordinate geometry to four equivalent Dy(1), two equivalent Rh(1), two equivalent Co(1), and one Si(1) atom.
DyRhCoSi2 crystallizes in the tetragonal I-4m2 space group. Dy(1) is bonded in a 16-coordinate geometry to four equivalent Rh(1), four equivalent Co(1), and eight equivalent Si(1) atoms. All Dy(1)-Rh(1) bond lengths are 3.18 Å. All Dy(1)-Co(1) bond lengths are 3.18 Å. All Dy(1)-Si(1) bond lengths are 3.07 Å. Rh(1) is bonded to four equivalent Dy(1), four equivalent Co(1), and four equivalent Si(1) atoms to form distorted RhDy4Co4Si4 tetrahedra that share corners with four equivalent Co(1)Dy4Si4Rh4 cuboctahedra, corners with twelve equivalent Rh(1)Dy4Co4Si4 tetrahedra, edges with two equivalent Co(1)Dy4Si4Rh4 cuboctahedra, faces with four equivalent Co(1)Dy4Si4Rh4 cuboctahedra, and faces with four equivalent Rh(1)Dy4Co4Si4 tetrahedra. All Rh(1)-Co(1) bond lengths are 2.81 Å. All Rh(1)-Si(1) bond lengths are 2.35 Å. Co(1) is bonded to four equivalent Dy(1), four equivalent Rh(1), and four equivalent Si(1) atoms to form CoDy4Si4Rh4 cuboctahedra that share corners with twelve equivalent Co(1)Dy4Si4Rh4 cuboctahedra, corners with four equivalent Rh(1)Dy4Co4Si4 tetrahedra, edges with two equivalent Rh(1)Dy4Co4Si4 tetrahedra, faces with four equivalent Co(1)Dy4Si4Rh4 cuboctahedra, and faces with four equivalent Rh(1)Dy4Co4Si4 tetrahedra. All Co(1)-Si(1) bond lengths are 2.35 Å. Si(1) is bonded in a 9-coordinate geometry to four equivalent Dy(1), two equivalent Rh(1), two equivalent Co(1), and one Si(1) atom. The Si(1)-Si(1) bond length is 2.45 Å.