Dy5Ni2Sb crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded to three equivalent Ni(1) and two equivalent Sb(1) atoms to form distorted DyNi3Sb2 trigonal bipyramids that share corners with four equivalent Dy(2)Ni4Sb2 octahedra, corners with twelve equivalent Dy(1)Ni3Sb2 trigonal bipyramids, edges with seven equivalent Dy(1)Ni3Sb2 trigonal bipyramids, faces with two equivalent Dy(2)Ni4Sb2 octahedra, and  a faceface with one Dy(1)Ni3Sb2 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 41-62°. In the second Dy site, Dy(2) is bonded to four equivalent Ni(1) and two equivalent Sb(1) atoms to form DyNi4Sb2 octahedra that share corners with six equivalent Dy(2)Ni4Sb2 octahedra, corners with sixteen equivalent Dy(1)Ni3Sb2 trigonal bipyramids, and faces with eight equivalent Dy(1)Ni3Sb2 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 0-51°. Ni(1) is bonded in a 8-coordinate geometry to two equivalent Dy(2) and six equivalent Dy(1) atoms. Sb(1) is bonded in a distorted q6 geometry to two equivalent Dy(2) and eight equivalent Dy(1) atoms.
Dy5Ni2Sb crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded to three equivalent Ni(1) and two equivalent Sb(1) atoms to form distorted DyNi3Sb2 trigonal bipyramids that share corners with four equivalent Dy(2)Ni4Sb2 octahedra, corners with twelve equivalent Dy(1)Ni3Sb2 trigonal bipyramids, edges with seven equivalent Dy(1)Ni3Sb2 trigonal bipyramids, faces with two equivalent Dy(2)Ni4Sb2 octahedra, and  a faceface with one Dy(1)Ni3Sb2 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 41-62°. There are two shorter (2.83 Å) and one longer (2.92 Å) Dy(1)-Ni(1) bond length. Both Dy(1)-Sb(1) bond lengths are 3.25 Å. In the second Dy site, Dy(2) is bonded to four equivalent Ni(1) and two equivalent Sb(1) atoms to form DyNi4Sb2 octahedra that share corners with six equivalent Dy(2)Ni4Sb2 octahedra, corners with sixteen equivalent Dy(1)Ni3Sb2 trigonal bipyramids, and faces with eight equivalent Dy(1)Ni3Sb2 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 0-51°. All Dy(2)-Ni(1) bond lengths are 2.99 Å. Both Dy(2)-Sb(1) bond lengths are 3.30 Å. Ni(1) is bonded in a 8-coordinate geometry to two equivalent Dy(2) and six equivalent Dy(1) atoms. Sb(1) is bonded in a distorted q6 geometry to two equivalent Dy(2) and eight equivalent Dy(1) atoms.