Mg14YV crystallizes in the orthorhombic Amm2 space group. There are seven inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Mg(2), two equivalent Mg(6), four equivalent Mg(4), and four equivalent Mg(5) atoms to form MgMg12 cuboctahedra that share corners with four equivalent V(1)Y2Mg10 cuboctahedra, corners with six equivalent Mg(1)Mg12 cuboctahedra, corners with eight equivalent Mg(3)Y2Mg8V2 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(6)YMg11 cuboctahedra, edges with eight equivalent Mg(5)YMg10V cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with two equivalent Mg(6)YMg11 cuboctahedra, faces with two equivalent Y(1)Mg10V2 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, and faces with four equivalent Mg(5)YMg10V cuboctahedra. In the second Mg site, Mg(2) is bonded to two equivalent Mg(1), two equivalent Mg(7), four equivalent Mg(4), and four equivalent Mg(5) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Y(1)Mg10V2 cuboctahedra, corners with six equivalent Mg(2)Mg12 cuboctahedra, corners with eight equivalent Mg(3)Y2Mg8V2 cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with eight equivalent Mg(5)YMg10V cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with two equivalent V(1)Y2Mg10 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, faces with four equivalent Mg(5)YMg10V cuboctahedra, and faces with six equivalent Mg(6)YMg11 cuboctahedra. In the third Mg site, Mg(3) is bonded to two equivalent Mg(3), two equivalent Mg(5), two equivalent Mg(6), two equivalent Mg(7), two equivalent Y(1), and two equivalent V(1) atoms to form distorted MgY2Mg8V2 cuboctahedra that share corners with four equivalent Mg(1)Mg12 cuboctahedra, corners with four equivalent Mg(2)Mg12 cuboctahedra, corners with four equivalent Mg(4)Mg12 cuboctahedra, corners with six equivalent Mg(3)Y2Mg8V2 cuboctahedra, edges with two equivalent Mg(3)Y2Mg8V2 cuboctahedra, edges with two equivalent Y(1)Mg10V2 cuboctahedra, edges with two equivalent V(1)Y2Mg10 cuboctahedra, edges with four equivalent Mg(5)YMg10V cuboctahedra, edges with four equivalent Mg(6)YMg11 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Y2Mg8V2 cuboctahedra, faces with two equivalent Mg(6)YMg11 cuboctahedra, faces with two equivalent Y(1)Mg10V2 cuboctahedra, faces with two equivalent V(1)Y2Mg10 cuboctahedra, and faces with eight equivalent Mg(5)YMg10V cuboctahedra. In the fourth Mg site, Mg(4) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(4), two equivalent Mg(5), two equivalent Mg(6), and two equivalent Mg(7) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Mg(3)Y2Mg8V2 cuboctahedra, corners with four equivalent Y(1)Mg10V2 cuboctahedra, corners with four equivalent V(1)Y2Mg10 cuboctahedra, corners with six equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with two equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(5)YMg10V cuboctahedra, edges with four equivalent Mg(6)YMg11 cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Y2Mg8V2 cuboctahedra, faces with two equivalent Mg(6)YMg11 cuboctahedra, and faces with eight equivalent Mg(5)YMg10V cuboctahedra. In the fifth Mg site, Mg(5) is bonded to one Mg(1), one Mg(2), one Mg(3), one Mg(4), two equivalent Mg(5), two equivalent Mg(6), two equivalent Mg(7), one Y(1), and one V(1) atom to form distorted MgYMg10V cuboctahedra that share corners with four equivalent Mg(6)YMg11 cuboctahedra, corners with ten equivalent Mg(5)YMg10V cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with two equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Mg(3)Y2Mg8V2 cuboctahedra, edges with two equivalent Mg(5)YMg10V cuboctahedra, edges with two equivalent Mg(6)YMg11 cuboctahedra, edges with two equivalent Y(1)Mg10V2 cuboctahedra, edges with two equivalent V(1)Y2Mg10 cuboctahedra,  a faceface with one Mg(1)Mg12 cuboctahedra,  a faceface with one Mg(2)Mg12 cuboctahedra,  a faceface with one Y(1)Mg10V2 cuboctahedra,  a faceface with one V(1)Y2Mg10 cuboctahedra, faces with two equivalent Mg(6)YMg11 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, faces with four equivalent Mg(3)Y2Mg8V2 cuboctahedra, and faces with four equivalent Mg(5)YMg10V cuboctahedra. In the sixth Mg site, Mg(6) is bonded to one Mg(1), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mg(7), four equivalent Mg(5), and one Y(1) atom to form MgYMg11 cuboctahedra that share corners with six equivalent Mg(6)YMg11 cuboctahedra, corners with eight equivalent Mg(5)YMg10V cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with two equivalent Y(1)Mg10V2 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(3)Y2Mg8V2 cuboctahedra, edges with four equivalent Mg(5)YMg10V cuboctahedra,  a faceface with one Mg(1)Mg12 cuboctahedra,  a faceface with one Y(1)Mg10V2 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Y2Mg8V2 cuboctahedra, faces with two equivalent Mg(6)YMg11 cuboctahedra, faces with three equivalent Mg(2)Mg12 cuboctahedra, faces with three equivalent V(1)Y2Mg10 cuboctahedra, and faces with four equivalent Mg(5)YMg10V cuboctahedra. In the seventh Mg site, Mg(7) is bonded in a distorted single-bond geometry to one Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mg(6), four equivalent Mg(5), and one V(1) atom. Y(1) is bonded to two equivalent Mg(6), four equivalent Mg(3), four equivalent Mg(5), and two equivalent V(1) atoms to form YMg10V2 cuboctahedra that share corners with four equivalent Mg(2)Mg12 cuboctahedra, corners with six equivalent Y(1)Mg10V2 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent V(1)Y2Mg10 cuboctahedra, edges with four equivalent Mg(3)Y2Mg8V2 cuboctahedra, edges with four equivalent Mg(6)YMg11 cuboctahedra, edges with eight equivalent Mg(5)YMg10V cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with two equivalent Mg(6)YMg11 cuboctahedra, faces with two equivalent V(1)Y2Mg10 cuboctahedra, faces with four equivalent Mg(3)Y2Mg8V2 cuboctahedra, and faces with four equivalent Mg(5)YMg10V cuboctahedra. V(1) is bonded to two equivalent Mg(7), four equivalent Mg(3), four equivalent Mg(5), and two equivalent Y(1) atoms to form VY2Mg10 cuboctahedra that share corners with four equivalent Mg(1)Mg12 cuboctahedra, corners with six equivalent V(1)Y2Mg10 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Y(1)Mg10V2 cuboctahedra, edges with four equivalent Mg(3)Y2Mg8V2 cuboctahedra, edges with eight equivalent Mg(5)YMg10V cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with two equivalent Y(1)Mg10V2 cuboctahedra, faces with four equivalent Mg(3)Y2Mg8V2 cuboctahedra, faces with four equivalent Mg(5)YMg10V cuboctahedra, and faces with six equivalent Mg(6)YMg11 cuboctahedra.
Mg14YV crystallizes in the orthorhombic Amm2 space group. There are seven inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Mg(2), two equivalent Mg(6), four equivalent Mg(4), and four equivalent Mg(5) atoms to form MgMg12 cuboctahedra that share corners with four equivalent V(1)Y2Mg10 cuboctahedra, corners with six equivalent Mg(1)Mg12 cuboctahedra, corners with eight equivalent Mg(3)Y2Mg8V2 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(6)YMg11 cuboctahedra, edges with eight equivalent Mg(5)YMg10V cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with two equivalent Mg(6)YMg11 cuboctahedra, faces with two equivalent Y(1)Mg10V2 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, and faces with four equivalent Mg(5)YMg10V cuboctahedra. Both Mg(1)-Mg(2) bond lengths are 3.17 Å. Both Mg(1)-Mg(6) bond lengths are 3.12 Å. There are two shorter (3.20 Å) and two longer (3.23 Å) Mg(1)-Mg(4) bond lengths. All Mg(1)-Mg(5) bond lengths are 3.18 Å. In the second Mg site, Mg(2) is bonded to two equivalent Mg(1), two equivalent Mg(7), four equivalent Mg(4), and four equivalent Mg(5) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Y(1)Mg10V2 cuboctahedra, corners with six equivalent Mg(2)Mg12 cuboctahedra, corners with eight equivalent Mg(3)Y2Mg8V2 cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with eight equivalent Mg(5)YMg10V cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with two equivalent V(1)Y2Mg10 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, faces with four equivalent Mg(5)YMg10V cuboctahedra, and faces with six equivalent Mg(6)YMg11 cuboctahedra. Both Mg(2)-Mg(7) bond lengths are 3.25 Å. There are two shorter (3.19 Å) and two longer (3.24 Å) Mg(2)-Mg(4) bond lengths. All Mg(2)-Mg(5) bond lengths are 3.16 Å. In the third Mg site, Mg(3) is bonded to two equivalent Mg(3), two equivalent Mg(5), two equivalent Mg(6), two equivalent Mg(7), two equivalent Y(1), and two equivalent V(1) atoms to form distorted MgY2Mg8V2 cuboctahedra that share corners with four equivalent Mg(1)Mg12 cuboctahedra, corners with four equivalent Mg(2)Mg12 cuboctahedra, corners with four equivalent Mg(4)Mg12 cuboctahedra, corners with six equivalent Mg(3)Y2Mg8V2 cuboctahedra, edges with two equivalent Mg(3)Y2Mg8V2 cuboctahedra, edges with two equivalent Y(1)Mg10V2 cuboctahedra, edges with two equivalent V(1)Y2Mg10 cuboctahedra, edges with four equivalent Mg(5)YMg10V cuboctahedra, edges with four equivalent Mg(6)YMg11 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Y2Mg8V2 cuboctahedra, faces with two equivalent Mg(6)YMg11 cuboctahedra, faces with two equivalent Y(1)Mg10V2 cuboctahedra, faces with two equivalent V(1)Y2Mg10 cuboctahedra, and faces with eight equivalent Mg(5)YMg10V cuboctahedra. There is one shorter (3.08 Å) and one longer (3.26 Å) Mg(3)-Mg(3) bond length. Both Mg(3)-Mg(5) bond lengths are 3.16 Å. Both Mg(3)-Mg(6) bond lengths are 3.24 Å. Both Mg(3)-Mg(7) bond lengths are 3.14 Å. There is one shorter (3.21 Å) and one longer (3.22 Å) Mg(3)-Y(1) bond length. There is one shorter (3.13 Å) and one longer (3.30 Å) Mg(3)-V(1) bond length. In the fourth Mg site, Mg(4) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(4), two equivalent Mg(5), two equivalent Mg(6), and two equivalent Mg(7) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Mg(3)Y2Mg8V2 cuboctahedra, corners with four equivalent Y(1)Mg10V2 cuboctahedra, corners with four equivalent V(1)Y2Mg10 cuboctahedra, corners with six equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with two equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(5)YMg10V cuboctahedra, edges with four equivalent Mg(6)YMg11 cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Y2Mg8V2 cuboctahedra, faces with two equivalent Mg(6)YMg11 cuboctahedra, and faces with eight equivalent Mg(5)YMg10V cuboctahedra. There is one shorter (3.13 Å) and one longer (3.21 Å) Mg(4)-Mg(4) bond length. Both Mg(4)-Mg(5) bond lengths are 3.17 Å. Both Mg(4)-Mg(6) bond lengths are 3.13 Å. Both Mg(4)-Mg(7) bond lengths are 3.28 Å. In the fifth Mg site, Mg(5) is bonded to one Mg(1), one Mg(2), one Mg(3), one Mg(4), two equivalent Mg(5), two equivalent Mg(6), two equivalent Mg(7), one Y(1), and one V(1) atom to form distorted MgYMg10V cuboctahedra that share corners with four equivalent Mg(6)YMg11 cuboctahedra, corners with ten equivalent Mg(5)YMg10V cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with two equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Mg(3)Y2Mg8V2 cuboctahedra, edges with two equivalent Mg(5)YMg10V cuboctahedra, edges with two equivalent Mg(6)YMg11 cuboctahedra, edges with two equivalent Y(1)Mg10V2 cuboctahedra, edges with two equivalent V(1)Y2Mg10 cuboctahedra,  a faceface with one Mg(1)Mg12 cuboctahedra,  a faceface with one Mg(2)Mg12 cuboctahedra,  a faceface with one Y(1)Mg10V2 cuboctahedra,  a faceface with one V(1)Y2Mg10 cuboctahedra, faces with two equivalent Mg(6)YMg11 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, faces with four equivalent Mg(3)Y2Mg8V2 cuboctahedra, and faces with four equivalent Mg(5)YMg10V cuboctahedra. There is one shorter (3.11 Å) and one longer (3.23 Å) Mg(5)-Mg(5) bond length. There is one shorter (3.20 Å) and one longer (3.23 Å) Mg(5)-Mg(6) bond length. There is one shorter (3.17 Å) and one longer (3.27 Å) Mg(5)-Mg(7) bond length. The Mg(5)-Y(1) bond length is 3.21 Å. The Mg(5)-V(1) bond length is 3.17 Å. In the sixth Mg site, Mg(6) is bonded to one Mg(1), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mg(7), four equivalent Mg(5), and one Y(1) atom to form MgYMg11 cuboctahedra that share corners with six equivalent Mg(6)YMg11 cuboctahedra, corners with eight equivalent Mg(5)YMg10V cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with two equivalent Y(1)Mg10V2 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(3)Y2Mg8V2 cuboctahedra, edges with four equivalent Mg(5)YMg10V cuboctahedra,  a faceface with one Mg(1)Mg12 cuboctahedra,  a faceface with one Y(1)Mg10V2 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Y2Mg8V2 cuboctahedra, faces with two equivalent Mg(6)YMg11 cuboctahedra, faces with three equivalent Mg(2)Mg12 cuboctahedra, faces with three equivalent V(1)Y2Mg10 cuboctahedra, and faces with four equivalent Mg(5)YMg10V cuboctahedra. Both Mg(6)-Mg(7) bond lengths are 3.18 Å. The Mg(6)-Y(1) bond length is 3.23 Å. In the seventh Mg site, Mg(7) is bonded in a distorted single-bond geometry to one Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mg(6), four equivalent Mg(5), and one V(1) atom. The Mg(7)-V(1) bond length is 3.07 Å. Y(1) is bonded to two equivalent Mg(6), four equivalent Mg(3), four equivalent Mg(5), and two equivalent V(1) atoms to form YMg10V2 cuboctahedra that share corners with four equivalent Mg(2)Mg12 cuboctahedra, corners with six equivalent Y(1)Mg10V2 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent V(1)Y2Mg10 cuboctahedra, edges with four equivalent Mg(3)Y2Mg8V2 cuboctahedra, edges with four equivalent Mg(6)YMg11 cuboctahedra, edges with eight equivalent Mg(5)YMg10V cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with two equivalent Mg(6)YMg11 cuboctahedra, faces with two equivalent V(1)Y2Mg10 cuboctahedra, faces with four equivalent Mg(3)Y2Mg8V2 cuboctahedra, and faces with four equivalent Mg(5)YMg10V cuboctahedra. Both Y(1)-V(1) bond lengths are 3.17 Å. V(1) is bonded to two equivalent Mg(7), four equivalent Mg(3), four equivalent Mg(5), and two equivalent Y(1) atoms to form VY2Mg10 cuboctahedra that share corners with four equivalent Mg(1)Mg12 cuboctahedra, corners with six equivalent V(1)Y2Mg10 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Y(1)Mg10V2 cuboctahedra, edges with four equivalent Mg(3)Y2Mg8V2 cuboctahedra, edges with eight equivalent Mg(5)YMg10V cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with two equivalent Y(1)Mg10V2 cuboctahedra, faces with four equivalent Mg(3)Y2Mg8V2 cuboctahedra, faces with four equivalent Mg(5)YMg10V cuboctahedra, and faces with six equivalent Mg(6)YMg11 cuboctahedra.