Dy3Ni6Si2 crystallizes in the cubic Im-3m space group. Dy(1) is bonded in a 12-coordinate geometry to eight equivalent Ni(1) and four equivalent Si(1) atoms. Ni(1) is bonded in a 10-coordinate geometry to four equivalent Dy(1), four equivalent Ni(1), and two equivalent Si(1) atoms. Si(1) is bonded to six equivalent Dy(1) and six equivalent Ni(1) atoms to form a mixture of corner and face-sharing SiDy6Ni6 cuboctahedra.
Dy3Ni6Si2 crystallizes in the cubic Im-3m space group. Dy(1) is bonded in a 12-coordinate geometry to eight equivalent Ni(1) and four equivalent Si(1) atoms. There are four shorter (2.79 Å) and four longer (2.90 Å) Dy(1)-Ni(1) bond lengths. All Dy(1)-Si(1) bond lengths are 3.09 Å. Ni(1) is bonded in a 10-coordinate geometry to four equivalent Dy(1), four equivalent Ni(1), and two equivalent Si(1) atoms. All Ni(1)-Ni(1) bond lengths are 2.51 Å. Both Ni(1)-Si(1) bond lengths are 2.39 Å. Si(1) is bonded to six equivalent Dy(1) and six equivalent Ni(1) atoms to form a mixture of corner and face-sharing SiDy6Ni6 cuboctahedra.