NaMg6Al is beta Cu3Ti-derived structured and crystallizes in the orthorhombic Amm2 space group. Na(1) is bonded to two equivalent Mg(4), four equivalent Mg(1), four equivalent Mg(3), and two equivalent Al(1) atoms to form NaMg10Al2 cuboctahedra that share corners with four equivalent Mg(4)Na2Mg10 cuboctahedra, corners with six equivalent Na(1)Mg10Al2 cuboctahedra, corners with eight equivalent Mg(3)Na2Mg8Al2 cuboctahedra, edges with two equivalent Mg(4)Na2Mg10 cuboctahedra, edges with four equivalent Mg(3)Na2Mg8Al2 cuboctahedra, edges with four equivalent Al(1)Na2Mg10 cuboctahedra, edges with eight equivalent Mg(1)Na2Mg8Al2 cuboctahedra, faces with two equivalent Na(1)Mg10Al2 cuboctahedra, faces with two equivalent Mg(4)Na2Mg10 cuboctahedra, faces with two equivalent Al(1)Na2Mg10 cuboctahedra, faces with four equivalent Mg(1)Na2Mg8Al2 cuboctahedra, faces with four equivalent Mg(3)Na2Mg8Al2 cuboctahedra, and faces with six equivalent Mg(2)Mg10Al2 cuboctahedra. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Na(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), and two equivalent Al(1) atoms to form distorted MgNa2Mg8Al2 cuboctahedra that share corners with four equivalent Mg(2)Mg10Al2 cuboctahedra, corners with four equivalent Al(1)Na2Mg10 cuboctahedra, corners with ten equivalent Mg(1)Na2Mg8Al2 cuboctahedra, edges with two equivalent Mg(2)Mg10Al2 cuboctahedra, edges with two equivalent Mg(1)Na2Mg8Al2 cuboctahedra, edges with two equivalent Al(1)Na2Mg10 cuboctahedra, edges with four equivalent Na(1)Mg10Al2 cuboctahedra, edges with four equivalent Mg(4)Na2Mg10 cuboctahedra, edges with four equivalent Mg(3)Na2Mg8Al2 cuboctahedra, faces with two equivalent Na(1)Mg10Al2 cuboctahedra, faces with two equivalent Mg(2)Mg10Al2 cuboctahedra, faces with two equivalent Mg(4)Na2Mg10 cuboctahedra, faces with two equivalent Al(1)Na2Mg10 cuboctahedra, faces with four equivalent Mg(1)Na2Mg8Al2 cuboctahedra, and faces with eight equivalent Mg(3)Na2Mg8Al2 cuboctahedra. In the second Mg site, Mg(2) is bonded to two equivalent Mg(4), four equivalent Mg(1), four equivalent Mg(3), and two equivalent Al(1) atoms to form MgMg10Al2 cuboctahedra that share corners with four equivalent Al(1)Na2Mg10 cuboctahedra, corners with six equivalent Mg(2)Mg10Al2 cuboctahedra, corners with eight equivalent Mg(1)Na2Mg8Al2 cuboctahedra, edges with two equivalent Al(1)Na2Mg10 cuboctahedra, edges with four equivalent Mg(4)Na2Mg10 cuboctahedra, edges with four equivalent Mg(1)Na2Mg8Al2 cuboctahedra, edges with eight equivalent Mg(3)Na2Mg8Al2 cuboctahedra, faces with two equivalent Mg(2)Mg10Al2 cuboctahedra, faces with two equivalent Mg(4)Na2Mg10 cuboctahedra, faces with two equivalent Al(1)Na2Mg10 cuboctahedra, faces with four equivalent Mg(1)Na2Mg8Al2 cuboctahedra, faces with four equivalent Mg(3)Na2Mg8Al2 cuboctahedra, and faces with six equivalent Na(1)Mg10Al2 cuboctahedra. In the third Mg site, Mg(3) is bonded to two equivalent Na(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), and two equivalent Al(1) atoms to form distorted MgNa2Mg8Al2 cuboctahedra that share corners with four equivalent Na(1)Mg10Al2 cuboctahedra, corners with four equivalent Mg(4)Na2Mg10 cuboctahedra, corners with ten equivalent Mg(3)Na2Mg8Al2 cuboctahedra, edges with two equivalent Na(1)Mg10Al2 cuboctahedra, edges with two equivalent Mg(4)Na2Mg10 cuboctahedra, edges with two equivalent Mg(3)Na2Mg8Al2 cuboctahedra, edges with four equivalent Mg(2)Mg10Al2 cuboctahedra, edges with four equivalent Mg(1)Na2Mg8Al2 cuboctahedra, edges with four equivalent Al(1)Na2Mg10 cuboctahedra, faces with two equivalent Na(1)Mg10Al2 cuboctahedra, faces with two equivalent Mg(2)Mg10Al2 cuboctahedra, faces with two equivalent Mg(4)Na2Mg10 cuboctahedra, faces with two equivalent Al(1)Na2Mg10 cuboctahedra, faces with four equivalent Mg(3)Na2Mg8Al2 cuboctahedra, and faces with eight equivalent Mg(1)Na2Mg8Al2 cuboctahedra. In the fourth Mg site, Mg(4) is bonded to two equivalent Na(1), two equivalent Mg(2), four equivalent Mg(1), and four equivalent Mg(3) atoms to form distorted MgNa2Mg10 cuboctahedra that share corners with four equivalent Na(1)Mg10Al2 cuboctahedra, corners with six equivalent Mg(4)Na2Mg10 cuboctahedra, corners with eight equivalent Mg(3)Na2Mg8Al2 cuboctahedra, edges with two equivalent Na(1)Mg10Al2 cuboctahedra, edges with four equivalent Mg(2)Mg10Al2 cuboctahedra, edges with four equivalent Mg(3)Na2Mg8Al2 cuboctahedra, edges with eight equivalent Mg(1)Na2Mg8Al2 cuboctahedra, faces with two equivalent Na(1)Mg10Al2 cuboctahedra, faces with two equivalent Mg(2)Mg10Al2 cuboctahedra, faces with two equivalent Mg(4)Na2Mg10 cuboctahedra, faces with four equivalent Mg(1)Na2Mg8Al2 cuboctahedra, faces with four equivalent Mg(3)Na2Mg8Al2 cuboctahedra, and faces with six equivalent Al(1)Na2Mg10 cuboctahedra. Al(1) is bonded to two equivalent Na(1), two equivalent Mg(2), four equivalent Mg(1), and four equivalent Mg(3) atoms to form AlNa2Mg10 cuboctahedra that share corners with four equivalent Mg(2)Mg10Al2 cuboctahedra, corners with six equivalent Al(1)Na2Mg10 cuboctahedra, corners with eight equivalent Mg(1)Na2Mg8Al2 cuboctahedra, edges with two equivalent Mg(2)Mg10Al2 cuboctahedra, edges with four equivalent Na(1)Mg10Al2 cuboctahedra, edges with four equivalent Mg(1)Na2Mg8Al2 cuboctahedra, edges with eight equivalent Mg(3)Na2Mg8Al2 cuboctahedra, faces with two equivalent Na(1)Mg10Al2 cuboctahedra, faces with two equivalent Mg(2)Mg10Al2 cuboctahedra, faces with two equivalent Al(1)Na2Mg10 cuboctahedra, faces with four equivalent Mg(1)Na2Mg8Al2 cuboctahedra, faces with four equivalent Mg(3)Na2Mg8Al2 cuboctahedra, and faces with six equivalent Mg(4)Na2Mg10 cuboctahedra.
NaMg6Al is beta Cu3Ti-derived structured and crystallizes in the orthorhombic Amm2 space group. Na(1) is bonded to two equivalent Mg(4), four equivalent Mg(1), four equivalent Mg(3), and two equivalent Al(1) atoms to form NaMg10Al2 cuboctahedra that share corners with four equivalent Mg(4)Na2Mg10 cuboctahedra, corners with six equivalent Na(1)Mg10Al2 cuboctahedra, corners with eight equivalent Mg(3)Na2Mg8Al2 cuboctahedra, edges with two equivalent Mg(4)Na2Mg10 cuboctahedra, edges with four equivalent Mg(3)Na2Mg8Al2 cuboctahedra, edges with four equivalent Al(1)Na2Mg10 cuboctahedra, edges with eight equivalent Mg(1)Na2Mg8Al2 cuboctahedra, faces with two equivalent Na(1)Mg10Al2 cuboctahedra, faces with two equivalent Mg(4)Na2Mg10 cuboctahedra, faces with two equivalent Al(1)Na2Mg10 cuboctahedra, faces with four equivalent Mg(1)Na2Mg8Al2 cuboctahedra, faces with four equivalent Mg(3)Na2Mg8Al2 cuboctahedra, and faces with six equivalent Mg(2)Mg10Al2 cuboctahedra. Both Na(1)-Mg(4) bond lengths are 3.21 Å. All Na(1)-Mg(1) bond lengths are 3.19 Å. There are two shorter (3.16 Å) and two longer (3.25 Å) Na(1)-Mg(3) bond lengths. Both Na(1)-Al(1) bond lengths are 3.18 Å. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Na(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), and two equivalent Al(1) atoms to form distorted MgNa2Mg8Al2 cuboctahedra that share corners with four equivalent Mg(2)Mg10Al2 cuboctahedra, corners with four equivalent Al(1)Na2Mg10 cuboctahedra, corners with ten equivalent Mg(1)Na2Mg8Al2 cuboctahedra, edges with two equivalent Mg(2)Mg10Al2 cuboctahedra, edges with two equivalent Mg(1)Na2Mg8Al2 cuboctahedra, edges with two equivalent Al(1)Na2Mg10 cuboctahedra, edges with four equivalent Na(1)Mg10Al2 cuboctahedra, edges with four equivalent Mg(4)Na2Mg10 cuboctahedra, edges with four equivalent Mg(3)Na2Mg8Al2 cuboctahedra, faces with two equivalent Na(1)Mg10Al2 cuboctahedra, faces with two equivalent Mg(2)Mg10Al2 cuboctahedra, faces with two equivalent Mg(4)Na2Mg10 cuboctahedra, faces with two equivalent Al(1)Na2Mg10 cuboctahedra, faces with four equivalent Mg(1)Na2Mg8Al2 cuboctahedra, and faces with eight equivalent Mg(3)Na2Mg8Al2 cuboctahedra. There is one shorter (3.16 Å) and one longer (3.26 Å) Mg(1)-Mg(1) bond length. There is one shorter (3.20 Å) and one longer (3.22 Å) Mg(1)-Mg(2) bond length. Both Mg(1)-Mg(3) bond lengths are 3.18 Å. Both Mg(1)-Mg(4) bond lengths are 3.16 Å. There is one shorter (3.16 Å) and one longer (3.25 Å) Mg(1)-Al(1) bond length. In the second Mg site, Mg(2) is bonded to two equivalent Mg(4), four equivalent Mg(1), four equivalent Mg(3), and two equivalent Al(1) atoms to form MgMg10Al2 cuboctahedra that share corners with four equivalent Al(1)Na2Mg10 cuboctahedra, corners with six equivalent Mg(2)Mg10Al2 cuboctahedra, corners with eight equivalent Mg(1)Na2Mg8Al2 cuboctahedra, edges with two equivalent Al(1)Na2Mg10 cuboctahedra, edges with four equivalent Mg(4)Na2Mg10 cuboctahedra, edges with four equivalent Mg(1)Na2Mg8Al2 cuboctahedra, edges with eight equivalent Mg(3)Na2Mg8Al2 cuboctahedra, faces with two equivalent Mg(2)Mg10Al2 cuboctahedra, faces with two equivalent Mg(4)Na2Mg10 cuboctahedra, faces with two equivalent Al(1)Na2Mg10 cuboctahedra, faces with four equivalent Mg(1)Na2Mg8Al2 cuboctahedra, faces with four equivalent Mg(3)Na2Mg8Al2 cuboctahedra, and faces with six equivalent Na(1)Mg10Al2 cuboctahedra. Both Mg(2)-Mg(4) bond lengths are 3.18 Å. All Mg(2)-Mg(3) bond lengths are 3.19 Å. Both Mg(2)-Al(1) bond lengths are 3.21 Å. In the third Mg site, Mg(3) is bonded to two equivalent Na(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), and two equivalent Al(1) atoms to form distorted MgNa2Mg8Al2 cuboctahedra that share corners with four equivalent Na(1)Mg10Al2 cuboctahedra, corners with four equivalent Mg(4)Na2Mg10 cuboctahedra, corners with ten equivalent Mg(3)Na2Mg8Al2 cuboctahedra, edges with two equivalent Na(1)Mg10Al2 cuboctahedra, edges with two equivalent Mg(4)Na2Mg10 cuboctahedra, edges with two equivalent Mg(3)Na2Mg8Al2 cuboctahedra, edges with four equivalent Mg(2)Mg10Al2 cuboctahedra, edges with four equivalent Mg(1)Na2Mg8Al2 cuboctahedra, edges with four equivalent Al(1)Na2Mg10 cuboctahedra, faces with two equivalent Na(1)Mg10Al2 cuboctahedra, faces with two equivalent Mg(2)Mg10Al2 cuboctahedra, faces with two equivalent Mg(4)Na2Mg10 cuboctahedra, faces with two equivalent Al(1)Na2Mg10 cuboctahedra, faces with four equivalent Mg(3)Na2Mg8Al2 cuboctahedra, and faces with eight equivalent Mg(1)Na2Mg8Al2 cuboctahedra. There is one shorter (3.14 Å) and one longer (3.29 Å) Mg(3)-Mg(3) bond length. There is one shorter (3.19 Å) and one longer (3.22 Å) Mg(3)-Mg(4) bond length. Both Mg(3)-Al(1) bond lengths are 3.14 Å. In the fourth Mg site, Mg(4) is bonded to two equivalent Na(1), two equivalent Mg(2), four equivalent Mg(1), and four equivalent Mg(3) atoms to form distorted MgNa2Mg10 cuboctahedra that share corners with four equivalent Na(1)Mg10Al2 cuboctahedra, corners with six equivalent Mg(4)Na2Mg10 cuboctahedra, corners with eight equivalent Mg(3)Na2Mg8Al2 cuboctahedra, edges with two equivalent Na(1)Mg10Al2 cuboctahedra, edges with four equivalent Mg(2)Mg10Al2 cuboctahedra, edges with four equivalent Mg(3)Na2Mg8Al2 cuboctahedra, edges with eight equivalent Mg(1)Na2Mg8Al2 cuboctahedra, faces with two equivalent Na(1)Mg10Al2 cuboctahedra, faces with two equivalent Mg(2)Mg10Al2 cuboctahedra, faces with two equivalent Mg(4)Na2Mg10 cuboctahedra, faces with four equivalent Mg(1)Na2Mg8Al2 cuboctahedra, faces with four equivalent Mg(3)Na2Mg8Al2 cuboctahedra, and faces with six equivalent Al(1)Na2Mg10 cuboctahedra. Al(1) is bonded to two equivalent Na(1), two equivalent Mg(2), four equivalent Mg(1), and four equivalent Mg(3) atoms to form AlNa2Mg10 cuboctahedra that share corners with four equivalent Mg(2)Mg10Al2 cuboctahedra, corners with six equivalent Al(1)Na2Mg10 cuboctahedra, corners with eight equivalent Mg(1)Na2Mg8Al2 cuboctahedra, edges with two equivalent Mg(2)Mg10Al2 cuboctahedra, edges with four equivalent Na(1)Mg10Al2 cuboctahedra, edges with four equivalent Mg(1)Na2Mg8Al2 cuboctahedra, edges with eight equivalent Mg(3)Na2Mg8Al2 cuboctahedra, faces with two equivalent Na(1)Mg10Al2 cuboctahedra, faces with two equivalent Mg(2)Mg10Al2 cuboctahedra, faces with two equivalent Al(1)Na2Mg10 cuboctahedra, faces with four equivalent Mg(1)Na2Mg8Al2 cuboctahedra, faces with four equivalent Mg(3)Na2Mg8Al2 cuboctahedra, and faces with six equivalent Mg(4)Na2Mg10 cuboctahedra.