Mg24Y5 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 12-coordinate geometry to three equivalent Mg(1), five equivalent Mg(2), one Y(2), and three equivalent Y(1) atoms. In the second Mg site, Mg(2) is bonded in a 13-coordinate geometry to five equivalent Mg(1), six equivalent Mg(2), and two equivalent Y(1) atoms. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 16-coordinate geometry to six equivalent Mg(2), nine equivalent Mg(1), and one Y(2) atom. In the second Y site, Y(2) is bonded in a 16-coordinate geometry to twelve equivalent Mg(1) and four equivalent Y(1) atoms.
Mg24Y5 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 12-coordinate geometry to three equivalent Mg(1), five equivalent Mg(2), one Y(2), and three equivalent Y(1) atoms. There is one shorter (2.84 Å) and two longer (3.02 Å) Mg(1)-Mg(1) bond lengths. There are a spread of Mg(1)-Mg(2) bond distances ranging from 2.94-3.43 Å. The Mg(1)-Y(2) bond length is 3.45 Å. There are two shorter (3.47 Å) and one longer (3.55 Å) Mg(1)-Y(1) bond length. In the second Mg site, Mg(2) is bonded in a 13-coordinate geometry to five equivalent Mg(1), six equivalent Mg(2), and two equivalent Y(1) atoms. There are two shorter (3.29 Å) and four longer (3.34 Å) Mg(2)-Mg(2) bond lengths. There is one shorter (3.24 Å) and one longer (3.63 Å) Mg(2)-Y(1) bond length. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 16-coordinate geometry to six equivalent Mg(2), nine equivalent Mg(1), and one Y(2) atom. The Y(1)-Y(2) bond length is 3.66 Å. In the second Y site, Y(2) is bonded in a 16-coordinate geometry to twelve equivalent Mg(1) and four equivalent Y(1) atoms.