Mg24Dy5 is alpha-derived structured and crystallizes in the cubic I-43m space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 13-coordinate geometry to five equivalent Mg(2), six equivalent Mg(1), and two equivalent Dy(1) atoms. In the second Mg site, Mg(2) is bonded in a 12-coordinate geometry to three equivalent Mg(2), five equivalent Mg(1), one Dy(2), and three equivalent Dy(1) atoms. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 16-coordinate geometry to six equivalent Mg(1), nine equivalent Mg(2), and one Dy(2) atom. In the second Dy site, Dy(2) is bonded in a 16-coordinate geometry to twelve equivalent Mg(2) and four equivalent Dy(1) atoms.
Mg24Dy5 is alpha-derived structured and crystallizes in the cubic I-43m space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 13-coordinate geometry to five equivalent Mg(2), six equivalent Mg(1), and two equivalent Dy(1) atoms. There are a spread of Mg(1)-Mg(2) bond distances ranging from 2.95-3.38 Å. There are two shorter (3.30 Å) and four longer (3.35 Å) Mg(1)-Mg(1) bond lengths. There is one shorter (3.20 Å) and one longer (3.67 Å) Mg(1)-Dy(1) bond length. In the second Mg site, Mg(2) is bonded in a 12-coordinate geometry to three equivalent Mg(2), five equivalent Mg(1), one Dy(2), and three equivalent Dy(1) atoms. There is one shorter (2.87 Å) and two longer (3.04 Å) Mg(2)-Mg(2) bond lengths. The Mg(2)-Dy(2) bond length is 3.47 Å. There are two shorter (3.45 Å) and one longer (3.56 Å) Mg(2)-Dy(1) bond length. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 16-coordinate geometry to six equivalent Mg(1), nine equivalent Mg(2), and one Dy(2) atom. The Dy(1)-Dy(2) bond length is 3.61 Å. In the second Dy site, Dy(2) is bonded in a 16-coordinate geometry to twelve equivalent Mg(2) and four equivalent Dy(1) atoms.