Dy5CoBi2 crystallizes in the orthorhombic Pnma space group. There are four inequivalent Dy sites. In the first Dy site, Dy(1) is bonded to one Co(1) and four equivalent Bi(1) atoms to form a mixture of distorted corner, face, and edge-sharing DyCoBi4 trigonal bipyramids. In the second Dy site, Dy(2) is bonded in a 5-coordinate geometry to one Co(1) and four equivalent Bi(1) atoms. In the third Dy site, Dy(3) is bonded to one Co(1) and four equivalent Bi(1) atoms to form a mixture of distorted corner, face, and edge-sharing DyCoBi4 trigonal bipyramids. In the fourth Dy site, Dy(4) is bonded in a 5-coordinate geometry to two equivalent Co(1) and three equivalent Bi(1) atoms. Co(1) is bonded to one Dy(1), one Dy(2), one Dy(3), and four equivalent Dy(4) atoms to form distorted edge-sharing CoDy7 pentagonal bipyramids. Bi(1) is bonded in a 9-coordinate geometry to two equivalent Dy(1), two equivalent Dy(2), two equivalent Dy(3), and three equivalent Dy(4) atoms.
Dy5CoBi2 crystallizes in the orthorhombic Pnma space group. There are four inequivalent Dy sites. In the first Dy site, Dy(1) is bonded to one Co(1) and four equivalent Bi(1) atoms to form a mixture of distorted corner, face, and edge-sharing DyCoBi4 trigonal bipyramids. The Dy(1)-Co(1) bond length is 2.65 Å. All Dy(1)-Bi(1) bond lengths are 3.20 Å. In the second Dy site, Dy(2) is bonded in a 5-coordinate geometry to one Co(1) and four equivalent Bi(1) atoms. The Dy(2)-Co(1) bond length is 2.65 Å. There are two shorter (3.22 Å) and two longer (3.30 Å) Dy(2)-Bi(1) bond lengths. In the third Dy site, Dy(3) is bonded to one Co(1) and four equivalent Bi(1) atoms to form a mixture of distorted corner, face, and edge-sharing DyCoBi4 trigonal bipyramids. The Dy(3)-Co(1) bond length is 3.11 Å. All Dy(3)-Bi(1) bond lengths are 3.15 Å. In the fourth Dy site, Dy(4) is bonded in a 5-coordinate geometry to two equivalent Co(1) and three equivalent Bi(1) atoms. There is one shorter (2.76 Å) and one longer (2.82 Å) Dy(4)-Co(1) bond length. There are a spread of Dy(4)-Bi(1) bond distances ranging from 3.37-3.58 Å. Co(1) is bonded to one Dy(1), one Dy(2), one Dy(3), and four equivalent Dy(4) atoms to form distorted edge-sharing CoDy7 pentagonal bipyramids. Bi(1) is bonded in a 9-coordinate geometry to two equivalent Dy(1), two equivalent Dy(2), two equivalent Dy(3), and three equivalent Dy(4) atoms.