NaMg6La crystallizes in the orthorhombic Amm2 space group. Na(1) is bonded to two equivalent Mg(4); four Mg(1,1); four Mg(3,3,3); and two equivalent La(1) atoms to form NaLa2Mg10 cuboctahedra that share corners with four equivalent Mg(4)Na2Mg10 cuboctahedra; corners with six equivalent Na(1)La2Mg10 cuboctahedra; corners with eight Mg(3,3,3)Na2La2Mg8 cuboctahedra; edges with two equivalent Mg(4)Na2Mg10 cuboctahedra; edges with four Mg(3,3,3)Na2La2Mg8 cuboctahedra; edges with four equivalent La(1)Na2Mg10 cuboctahedra; faces with two equivalent Na(1)La2Mg10 cuboctahedra; faces with two equivalent Mg(4)Na2Mg10 cuboctahedra; faces with two equivalent La(1)Na2Mg10 cuboctahedra; faces with four Mg(3,3,3)Na2La2Mg8 cuboctahedra; and faces with six equivalent Mg(2)La2Mg10 cuboctahedra. There are seven inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 12-coordinate geometry to two equivalent Na(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), and two equivalent La(1) atoms. In the second Mg site, Mg(1) is bonded in a 12-coordinate geometry to two equivalent Na(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), and two equivalent La(1) atoms. In the third Mg site, Mg(2) is bonded to two equivalent Mg(4); four Mg(1,1); four Mg(3,3); and two equivalent La(1) atoms to form distorted MgLa2Mg10 cuboctahedra that share corners with four equivalent La(1)Na2Mg10 cuboctahedra; corners with six equivalent Mg(2)La2Mg10 cuboctahedra; edges with two equivalent La(1)Na2Mg10 cuboctahedra; edges with four equivalent Mg(4)Na2Mg10 cuboctahedra; edges with eight Mg(3,3,3)Na2La2Mg8 cuboctahedra; faces with two equivalent Mg(2)La2Mg10 cuboctahedra; faces with two equivalent Mg(4)Na2Mg10 cuboctahedra; faces with two equivalent La(1)Na2Mg10 cuboctahedra; faces with four Mg(3,3)Na2La2Mg8 cuboctahedra; and faces with six equivalent Na(1)La2Mg10 cuboctahedra. In the fourth 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 La(1) atoms to form distorted MgNa2La2Mg8 cuboctahedra that share corners with four equivalent Na(1)La2Mg10 cuboctahedra; corners with four equivalent Mg(4)Na2Mg10 cuboctahedra; corners with ten Mg(3,3,3)Na2La2Mg8 cuboctahedra; edges with two equivalent Na(1)La2Mg10 cuboctahedra; edges with two equivalent Mg(3)Na2La2Mg8 cuboctahedra; edges with two equivalent Mg(4)Na2Mg10 cuboctahedra; edges with four equivalent Mg(2)La2Mg10 cuboctahedra; edges with four equivalent La(1)Na2Mg10 cuboctahedra; faces with two equivalent Na(1)La2Mg10 cuboctahedra; faces with two equivalent Mg(2)La2Mg10 cuboctahedra; faces with two equivalent Mg(4)Na2Mg10 cuboctahedra; faces with two equivalent La(1)Na2Mg10 cuboctahedra; and faces with four Mg(3,3)Na2La2Mg8 cuboctahedra. In the fifth 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 La(1) atoms to form distorted MgNa2La2Mg8 cuboctahedra that share corners with four equivalent Na(1)La2Mg10 cuboctahedra; corners with four equivalent Mg(4)Na2Mg10 cuboctahedra; corners with ten Mg(3,3)Na2La2Mg8 cuboctahedra; edges with two equivalent Na(1)La2Mg10 cuboctahedra; edges with two equivalent Mg(3)Na2La2Mg8 cuboctahedra; edges with two equivalent Mg(4)Na2Mg10 cuboctahedra; edges with four equivalent Mg(2)La2Mg10 cuboctahedra; edges with four equivalent La(1)Na2Mg10 cuboctahedra; faces with two equivalent Na(1)La2Mg10 cuboctahedra; faces with two equivalent Mg(2)La2Mg10 cuboctahedra; faces with two equivalent Mg(4)Na2Mg10 cuboctahedra; faces with two equivalent La(1)Na2Mg10 cuboctahedra; and faces with four Mg(3,3)Na2La2Mg8 cuboctahedra. In the sixth Mg site, Mg(4) is bonded to two equivalent Na(1); two equivalent Mg(2); four Mg(1,1); and four Mg(3,3,3) atoms to form distorted MgNa2Mg10 cuboctahedra that share corners with four equivalent Na(1)La2Mg10 cuboctahedra; corners with six equivalent Mg(4)Na2Mg10 cuboctahedra; corners with eight Mg(3,3,3)Na2La2Mg8 cuboctahedra; edges with two equivalent Na(1)La2Mg10 cuboctahedra; edges with four equivalent Mg(2)La2Mg10 cuboctahedra; edges with four Mg(3,3,3)Na2La2Mg8 cuboctahedra; faces with two equivalent Na(1)La2Mg10 cuboctahedra; faces with two equivalent Mg(2)La2Mg10 cuboctahedra; faces with two equivalent Mg(4)Na2Mg10 cuboctahedra; faces with four Mg(3,3,3)Na2La2Mg8 cuboctahedra; and faces with six equivalent La(1)Na2Mg10 cuboctahedra. In the seventh 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 La(1) atoms to form distorted MgNa2La2Mg8 cuboctahedra that share corners with four equivalent Na(1)La2Mg10 cuboctahedra; corners with four equivalent Mg(4)Na2Mg10 cuboctahedra; corners with ten Mg(3,3)Na2La2Mg8 cuboctahedra; edges with two equivalent Na(1)La2Mg10 cuboctahedra; edges with two equivalent Mg(3)Na2La2Mg8 cuboctahedra; edges with two equivalent Mg(4)Na2Mg10 cuboctahedra; edges with four equivalent Mg(2)La2Mg10 cuboctahedra; edges with four equivalent La(1)Na2Mg10 cuboctahedra; faces with two equivalent Na(1)La2Mg10 cuboctahedra; faces with two equivalent Mg(2)La2Mg10 cuboctahedra; faces with two equivalent Mg(4)Na2Mg10 cuboctahedra; faces with two equivalent La(1)Na2Mg10 cuboctahedra; and faces with four Mg(3,3)Na2La2Mg8 cuboctahedra. La(1) is bonded to two equivalent Na(1); two equivalent Mg(2); four Mg(1,1); and four Mg(3,3) atoms to form LaNa2Mg10 cuboctahedra that share corners with four equivalent Mg(2)La2Mg10 cuboctahedra; corners with six equivalent La(1)Na2Mg10 cuboctahedra; edges with two equivalent Mg(2)La2Mg10 cuboctahedra; edges with four equivalent Na(1)La2Mg10 cuboctahedra; edges with eight Mg(3,3,3)Na2La2Mg8 cuboctahedra; faces with two equivalent Na(1)La2Mg10 cuboctahedra; faces with two equivalent Mg(2)La2Mg10 cuboctahedra; faces with two equivalent La(1)Na2Mg10 cuboctahedra; faces with four Mg(3,3)Na2La2Mg8 cuboctahedra; and faces with six equivalent Mg(4)Na2Mg10 cuboctahedra.
NaMg6La crystallizes in the orthorhombic Amm2 space group. Na(1) is bonded to two equivalent Mg(4); four Mg(1,1); four Mg(3,3,3); and two equivalent La(1) atoms to form NaLa2Mg10 cuboctahedra that share corners with four equivalent Mg(4)Na2Mg10 cuboctahedra; corners with six equivalent Na(1)La2Mg10 cuboctahedra; corners with eight Mg(3,3,3)Na2La2Mg8 cuboctahedra; edges with two equivalent Mg(4)Na2Mg10 cuboctahedra; edges with four Mg(3,3,3)Na2La2Mg8 cuboctahedra; edges with four equivalent La(1)Na2Mg10 cuboctahedra; faces with two equivalent Na(1)La2Mg10 cuboctahedra; faces with two equivalent Mg(4)Na2Mg10 cuboctahedra; faces with two equivalent La(1)Na2Mg10 cuboctahedra; faces with four Mg(3,3,3)Na2La2Mg8 cuboctahedra; and faces with six equivalent Mg(2)La2Mg10 cuboctahedra. Both Na(1)-Mg(4) bond lengths are 3.39 Å. All Na(1)-Mg(1,1) bond lengths are 3.29 Å. There are two shorter (3.29 Å) and two longer (3.53 Å) Na(1)-Mg(3,3,3) bond lengths. Both Na(1)-La(1) bond lengths are 3.38 Å. There are seven inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 12-coordinate geometry to two equivalent Na(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), and two equivalent La(1) atoms. There is one shorter (3.38 Å) and one longer (3.40 Å) Mg(1)-Mg(1) bond length. There is one shorter (3.34 Å) and one longer (3.48 Å) Mg(1)-Mg(2) bond length. Both Mg(1)-Mg(3) bond lengths are 3.27 Å. Both Mg(1)-Mg(4) bond lengths are 3.32 Å. There is one shorter (3.36 Å) and one longer (3.46 Å) Mg(1)-La(1) bond length. In the second Mg site, Mg(1) is bonded in a 12-coordinate geometry to two equivalent Na(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), and two equivalent La(1) atoms. There is one shorter (3.34 Å) and one longer (3.48 Å) Mg(1)-Mg(2) bond length. Both Mg(1)-Mg(3) bond lengths are 3.27 Å. Both Mg(1)-Mg(4) bond lengths are 3.32 Å. There is one shorter (3.36 Å) and one longer (3.46 Å) Mg(1)-La(1) bond length. In the third Mg site, Mg(2) is bonded to two equivalent Mg(4); four Mg(1,1); four Mg(3,3); and two equivalent La(1) atoms to form distorted MgLa2Mg10 cuboctahedra that share corners with four equivalent La(1)Na2Mg10 cuboctahedra; corners with six equivalent Mg(2)La2Mg10 cuboctahedra; edges with two equivalent La(1)Na2Mg10 cuboctahedra; edges with four equivalent Mg(4)Na2Mg10 cuboctahedra; edges with eight Mg(3,3,3)Na2La2Mg8 cuboctahedra; faces with two equivalent Mg(2)La2Mg10 cuboctahedra; faces with two equivalent Mg(4)Na2Mg10 cuboctahedra; faces with two equivalent La(1)Na2Mg10 cuboctahedra; faces with four Mg(3,3)Na2La2Mg8 cuboctahedra; and faces with six equivalent Na(1)La2Mg10 cuboctahedra. Both Mg(2)-Mg(4) bond lengths are 3.34 Å. All Mg(2)-Mg(3,3) bond lengths are 3.28 Å. Both Mg(2)-La(1) bond lengths are 3.39 Å. In the fourth 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 La(1) atoms to form distorted MgNa2La2Mg8 cuboctahedra that share corners with four equivalent Na(1)La2Mg10 cuboctahedra; corners with four equivalent Mg(4)Na2Mg10 cuboctahedra; corners with ten Mg(3,3,3)Na2La2Mg8 cuboctahedra; edges with two equivalent Na(1)La2Mg10 cuboctahedra; edges with two equivalent Mg(3)Na2La2Mg8 cuboctahedra; edges with two equivalent Mg(4)Na2Mg10 cuboctahedra; edges with four equivalent Mg(2)La2Mg10 cuboctahedra; edges with four equivalent La(1)Na2Mg10 cuboctahedra; faces with two equivalent Na(1)La2Mg10 cuboctahedra; faces with two equivalent Mg(2)La2Mg10 cuboctahedra; faces with two equivalent Mg(4)Na2Mg10 cuboctahedra; faces with two equivalent La(1)Na2Mg10 cuboctahedra; and faces with four Mg(3,3)Na2La2Mg8 cuboctahedra. Both Mg(3)-Mg(1) bond lengths are 3.27 Å. There is one shorter (3.32 Å) and one longer (3.46 Å) Mg(3)-Mg(3) bond length. There is one shorter (3.40 Å) and one longer (3.42 Å) Mg(3)-Mg(4) bond length. Both Mg(3)-La(1) bond lengths are 3.32 Å. In the fifth 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 La(1) atoms to form distorted MgNa2La2Mg8 cuboctahedra that share corners with four equivalent Na(1)La2Mg10 cuboctahedra; corners with four equivalent Mg(4)Na2Mg10 cuboctahedra; corners with ten Mg(3,3)Na2La2Mg8 cuboctahedra; edges with two equivalent Na(1)La2Mg10 cuboctahedra; edges with two equivalent Mg(3)Na2La2Mg8 cuboctahedra; edges with two equivalent Mg(4)Na2Mg10 cuboctahedra; edges with four equivalent Mg(2)La2Mg10 cuboctahedra; edges with four equivalent La(1)Na2Mg10 cuboctahedra; faces with two equivalent Na(1)La2Mg10 cuboctahedra; faces with two equivalent Mg(2)La2Mg10 cuboctahedra; faces with two equivalent Mg(4)Na2Mg10 cuboctahedra; faces with two equivalent La(1)Na2Mg10 cuboctahedra; and faces with four Mg(3,3)Na2La2Mg8 cuboctahedra. Both Mg(3)-Mg(1) bond lengths are 3.27 Å. There is one shorter (3.40 Å) and one longer (3.42 Å) Mg(3)-Mg(4) bond length. Both Mg(3)-La(1) bond lengths are 3.32 Å. In the sixth Mg site, Mg(4) is bonded to two equivalent Na(1); two equivalent Mg(2); four Mg(1,1); and four Mg(3,3,3) atoms to form distorted MgNa2Mg10 cuboctahedra that share corners with four equivalent Na(1)La2Mg10 cuboctahedra; corners with six equivalent Mg(4)Na2Mg10 cuboctahedra; corners with eight Mg(3,3,3)Na2La2Mg8 cuboctahedra; edges with two equivalent Na(1)La2Mg10 cuboctahedra; edges with four equivalent Mg(2)La2Mg10 cuboctahedra; edges with four Mg(3,3,3)Na2La2Mg8 cuboctahedra; faces with two equivalent Na(1)La2Mg10 cuboctahedra; faces with two equivalent Mg(2)La2Mg10 cuboctahedra; faces with two equivalent Mg(4)Na2Mg10 cuboctahedra; faces with four Mg(3,3,3)Na2La2Mg8 cuboctahedra; and faces with six equivalent La(1)Na2Mg10 cuboctahedra. The Mg(4)-Mg(3) bond length is 3.40 Å. In the seventh 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 La(1) atoms to form distorted MgNa2La2Mg8 cuboctahedra that share corners with four equivalent Na(1)La2Mg10 cuboctahedra; corners with four equivalent Mg(4)Na2Mg10 cuboctahedra; corners with ten Mg(3,3)Na2La2Mg8 cuboctahedra; edges with two equivalent Na(1)La2Mg10 cuboctahedra; edges with two equivalent Mg(3)Na2La2Mg8 cuboctahedra; edges with two equivalent Mg(4)Na2Mg10 cuboctahedra; edges with four equivalent Mg(2)La2Mg10 cuboctahedra; edges with four equivalent La(1)Na2Mg10 cuboctahedra; faces with two equivalent Na(1)La2Mg10 cuboctahedra; faces with two equivalent Mg(2)La2Mg10 cuboctahedra; faces with two equivalent Mg(4)Na2Mg10 cuboctahedra; faces with two equivalent La(1)Na2Mg10 cuboctahedra; and faces with four Mg(3,3)Na2La2Mg8 cuboctahedra. Both Mg(3)-Mg(2) bond lengths are 3.28 Å. There is one shorter (3.32 Å) and one longer (3.46 Å) Mg(3)-Mg(3) bond length. Both Mg(3)-La(1) bond lengths are 3.32 Å. La(1) is bonded to two equivalent Na(1); two equivalent Mg(2); four Mg(1,1); and four Mg(3,3) atoms to form LaNa2Mg10 cuboctahedra that share corners with four equivalent Mg(2)La2Mg10 cuboctahedra; corners with six equivalent La(1)Na2Mg10 cuboctahedra; edges with two equivalent Mg(2)La2Mg10 cuboctahedra; edges with four equivalent Na(1)La2Mg10 cuboctahedra; edges with eight Mg(3,3,3)Na2La2Mg8 cuboctahedra; faces with two equivalent Na(1)La2Mg10 cuboctahedra; faces with two equivalent Mg(2)La2Mg10 cuboctahedra; faces with two equivalent La(1)Na2Mg10 cuboctahedra; faces with four Mg(3,3)Na2La2Mg8 cuboctahedra; and faces with six equivalent Mg(4)Na2Mg10 cuboctahedra.