Mg5Dy crystallizes in the monoclinic Cm space group. There are five inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 8-coordinate geometry to two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(5), and two equivalent Dy(1) atoms. In the second Mg site, Mg(2) is bonded in a distorted body-centered cubic geometry to two equivalent Mg(1), two equivalent Mg(3), two equivalent Mg(4), and two equivalent Dy(1) atoms. In the third Mg site, Mg(3) is bonded in a distorted q6 geometry to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(4), two equivalent Mg(5), and two equivalent Dy(1) atoms. In the fourth Mg site, Mg(4) is bonded in a distorted body-centered cubic geometry to two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(5), and two equivalent Dy(1) atoms. In the fifth Mg site, Mg(5) is bonded in a 8-coordinate geometry to two equivalent Mg(1), two equivalent Mg(3), two equivalent Mg(4), and two equivalent Dy(1) atoms. Dy(1) is bonded in a 8-coordinate geometry to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), and two equivalent Mg(5) atoms.
Mg5Dy crystallizes in the monoclinic Cm space group. There are five inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 8-coordinate geometry to two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(5), and two equivalent Dy(1) atoms. Both Mg(1)-Mg(2) bond lengths are 3.08 Å. Both Mg(1)-Mg(3) bond lengths are 3.20 Å. Both Mg(1)-Mg(5) bond lengths are 3.13 Å. Both Mg(1)-Dy(1) bond lengths are 3.28 Å. In the second Mg site, Mg(2) is bonded in a distorted body-centered cubic geometry to two equivalent Mg(1), two equivalent Mg(3), two equivalent Mg(4), and two equivalent Dy(1) atoms. Both Mg(2)-Mg(3) bond lengths are 3.19 Å. Both Mg(2)-Mg(4) bond lengths are 3.03 Å. Both Mg(2)-Dy(1) bond lengths are 3.24 Å. In the third Mg site, Mg(3) is bonded in a distorted q6 geometry to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(4), two equivalent Mg(5), and two equivalent Dy(1) atoms. Both Mg(3)-Mg(4) bond lengths are 3.20 Å. Both Mg(3)-Mg(5) bond lengths are 3.20 Å. There is one shorter (3.58 Å) and one longer (3.59 Å) Mg(3)-Dy(1) bond length. In the fourth Mg site, Mg(4) is bonded in a distorted body-centered cubic geometry to two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(5), and two equivalent Dy(1) atoms. Both Mg(4)-Mg(5) bond lengths are 3.09 Å. Both Mg(4)-Dy(1) bond lengths are 3.25 Å. In the fifth Mg site, Mg(5) is bonded in a 8-coordinate geometry to two equivalent Mg(1), two equivalent Mg(3), two equivalent Mg(4), and two equivalent Dy(1) atoms. Both Mg(5)-Dy(1) bond lengths are 3.28 Å. Dy(1) is bonded in a 8-coordinate geometry to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), and two equivalent Mg(5) atoms.