Mg5Ho crystallizes in the monoclinic C2/m space group. There are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 10-coordinate geometry to two equivalent Mg(1), two equivalent Mg(3), three equivalent Mg(2), and three equivalent Ho(1) atoms. In the second Mg site, Mg(2) is bonded in a 9-coordinate geometry to two equivalent Mg(2), two equivalent Mg(3), three equivalent Mg(1), and two equivalent Ho(1) atoms. In the third Mg site, Mg(3) is bonded in a distorted q6 geometry to four equivalent Mg(1), four equivalent Mg(2), and two equivalent Ho(1) atoms. Ho(1) is bonded in a 8-coordinate geometry to two equivalent Mg(3), four equivalent Mg(2), and six equivalent Mg(1) atoms.
Mg5Ho crystallizes in the monoclinic C2/m space group. There are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 10-coordinate geometry to two equivalent Mg(1), two equivalent Mg(3), three equivalent Mg(2), and three equivalent Ho(1) atoms. Both Mg(1)-Mg(1) bond lengths are 3.11 Å. Both Mg(1)-Mg(3) bond lengths are 3.17 Å. There are two shorter (3.08 Å) and one longer (3.39 Å) Mg(1)-Mg(2) bond length. There are two shorter (3.26 Å) and one longer (3.64 Å) Mg(1)-Ho(1) bond length. In the second Mg site, Mg(2) is bonded in a 9-coordinate geometry to two equivalent Mg(2), two equivalent Mg(3), three equivalent Mg(1), and two equivalent Ho(1) atoms. Both Mg(2)-Mg(2) bond lengths are 3.00 Å. Both Mg(2)-Mg(3) bond lengths are 3.17 Å. Both Mg(2)-Ho(1) bond lengths are 3.22 Å. In the third Mg site, Mg(3) is bonded in a distorted q6 geometry to four equivalent Mg(1), four equivalent Mg(2), and two equivalent Ho(1) atoms. Both Mg(3)-Ho(1) bond lengths are 3.53 Å. Ho(1) is bonded in a 8-coordinate geometry to two equivalent Mg(3), four equivalent Mg(2), and six equivalent Mg(1) atoms.