Mg6LaMn is beta-derived structured and crystallizes in the orthorhombic Amm2 space group. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent La(1), and two equivalent Mn(1) atoms to form distorted MgLa2Mg8Mn2 cuboctahedra that share corners with four equivalent Mg(2)Mg10Mn2 cuboctahedra, corners with four equivalent Mn(1)La2Mg10 cuboctahedra, corners with ten equivalent Mg(1)La2Mg8Mn2 cuboctahedra, edges with two equivalent Mg(1)La2Mg8Mn2 cuboctahedra, edges with two equivalent Mg(2)Mg10Mn2 cuboctahedra, edges with two equivalent Mn(1)La2Mg10 cuboctahedra, edges with four equivalent Mg(4)La2Mg10 cuboctahedra, edges with four equivalent La(1)Mg10Mn2 cuboctahedra, faces with two equivalent Mg(4)La2Mg10 cuboctahedra, faces with two equivalent Mg(2)Mg10Mn2 cuboctahedra, faces with two equivalent La(1)Mg10Mn2 cuboctahedra, faces with two equivalent Mn(1)La2Mg10 cuboctahedra, and faces with four equivalent Mg(1)La2Mg8Mn2 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 Mn(1) atoms to form MgMg10Mn2 cuboctahedra that share corners with four equivalent Mn(1)La2Mg10 cuboctahedra, corners with six equivalent Mg(2)Mg10Mn2 cuboctahedra, corners with eight equivalent Mg(1)La2Mg8Mn2 cuboctahedra, edges with two equivalent Mn(1)La2Mg10 cuboctahedra, edges with four equivalent Mg(4)La2Mg10 cuboctahedra, edges with four equivalent Mg(1)La2Mg8Mn2 cuboctahedra, faces with two equivalent Mg(4)La2Mg10 cuboctahedra, faces with two equivalent Mg(2)Mg10Mn2 cuboctahedra, faces with two equivalent Mn(1)La2Mg10 cuboctahedra, faces with four equivalent Mg(1)La2Mg8Mn2 cuboctahedra, and faces with six equivalent La(1)Mg10Mn2 cuboctahedra. In the third Mg site, Mg(3) is bonded in a 12-coordinate geometry to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent La(1), and two equivalent Mn(1) atoms. In the fourth Mg site, Mg(4) is bonded to two equivalent Mg(2), four equivalent Mg(1), four equivalent Mg(3), and two equivalent La(1) atoms to form distorted MgLa2Mg10 cuboctahedra that share corners with four equivalent La(1)Mg10Mn2 cuboctahedra, corners with six equivalent Mg(4)La2Mg10 cuboctahedra, edges with two equivalent La(1)Mg10Mn2 cuboctahedra, edges with four equivalent Mg(2)Mg10Mn2 cuboctahedra, edges with eight equivalent Mg(1)La2Mg8Mn2 cuboctahedra, faces with two equivalent Mg(4)La2Mg10 cuboctahedra, faces with two equivalent Mg(2)Mg10Mn2 cuboctahedra, faces with two equivalent La(1)Mg10Mn2 cuboctahedra, faces with four equivalent Mg(1)La2Mg8Mn2 cuboctahedra, and faces with six equivalent Mn(1)La2Mg10 cuboctahedra. La(1) is bonded to two equivalent Mg(4), four equivalent Mg(1), four equivalent Mg(3), and two equivalent Mn(1) atoms to form LaMg10Mn2 cuboctahedra that share corners with four equivalent Mg(4)La2Mg10 cuboctahedra, corners with six equivalent La(1)Mg10Mn2 cuboctahedra, edges with two equivalent Mg(4)La2Mg10 cuboctahedra, edges with four equivalent Mn(1)La2Mg10 cuboctahedra, edges with eight equivalent Mg(1)La2Mg8Mn2 cuboctahedra, faces with two equivalent Mg(4)La2Mg10 cuboctahedra, faces with two equivalent La(1)Mg10Mn2 cuboctahedra, faces with two equivalent Mn(1)La2Mg10 cuboctahedra, faces with four equivalent Mg(1)La2Mg8Mn2 cuboctahedra, and faces with six equivalent Mg(2)Mg10Mn2 cuboctahedra. Mn(1) is bonded to two equivalent Mg(2), four equivalent Mg(1), four equivalent Mg(3), and two equivalent La(1) atoms to form MnLa2Mg10 cuboctahedra that share corners with four equivalent Mg(2)Mg10Mn2 cuboctahedra, corners with six equivalent Mn(1)La2Mg10 cuboctahedra, corners with eight equivalent Mg(1)La2Mg8Mn2 cuboctahedra, edges with two equivalent Mg(2)Mg10Mn2 cuboctahedra, edges with four equivalent Mg(1)La2Mg8Mn2 cuboctahedra, edges with four equivalent La(1)Mg10Mn2 cuboctahedra, faces with two equivalent Mg(2)Mg10Mn2 cuboctahedra, faces with two equivalent La(1)Mg10Mn2 cuboctahedra, faces with two equivalent Mn(1)La2Mg10 cuboctahedra, faces with four equivalent Mg(1)La2Mg8Mn2 cuboctahedra, and faces with six equivalent Mg(4)La2Mg10 cuboctahedra.
Mg6LaMn is beta-derived structured and crystallizes in the orthorhombic Amm2 space group. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent La(1), and two equivalent Mn(1) atoms to form distorted MgLa2Mg8Mn2 cuboctahedra that share corners with four equivalent Mg(2)Mg10Mn2 cuboctahedra, corners with four equivalent Mn(1)La2Mg10 cuboctahedra, corners with ten equivalent Mg(1)La2Mg8Mn2 cuboctahedra, edges with two equivalent Mg(1)La2Mg8Mn2 cuboctahedra, edges with two equivalent Mg(2)Mg10Mn2 cuboctahedra, edges with two equivalent Mn(1)La2Mg10 cuboctahedra, edges with four equivalent Mg(4)La2Mg10 cuboctahedra, edges with four equivalent La(1)Mg10Mn2 cuboctahedra, faces with two equivalent Mg(4)La2Mg10 cuboctahedra, faces with two equivalent Mg(2)Mg10Mn2 cuboctahedra, faces with two equivalent La(1)Mg10Mn2 cuboctahedra, faces with two equivalent Mn(1)La2Mg10 cuboctahedra, and faces with four equivalent Mg(1)La2Mg8Mn2 cuboctahedra. There is one shorter (3.17 Å) and one longer (3.46 Å) Mg(1)-Mg(1) bond length. There is one shorter (3.30 Å) and one longer (3.35 Å) Mg(1)-Mg(2) bond length. Both Mg(1)-Mg(3) bond lengths are 3.14 Å. Both Mg(1)-Mg(4) bond lengths are 3.16 Å. Both Mg(1)-La(1) bond lengths are 3.29 Å. There is one shorter (3.20 Å) and one longer (3.44 Å) Mg(1)-Mn(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 Mn(1) atoms to form MgMg10Mn2 cuboctahedra that share corners with four equivalent Mn(1)La2Mg10 cuboctahedra, corners with six equivalent Mg(2)Mg10Mn2 cuboctahedra, corners with eight equivalent Mg(1)La2Mg8Mn2 cuboctahedra, edges with two equivalent Mn(1)La2Mg10 cuboctahedra, edges with four equivalent Mg(4)La2Mg10 cuboctahedra, edges with four equivalent Mg(1)La2Mg8Mn2 cuboctahedra, faces with two equivalent Mg(4)La2Mg10 cuboctahedra, faces with two equivalent Mg(2)Mg10Mn2 cuboctahedra, faces with two equivalent Mn(1)La2Mg10 cuboctahedra, faces with four equivalent Mg(1)La2Mg8Mn2 cuboctahedra, and faces with six equivalent La(1)Mg10Mn2 cuboctahedra. Both Mg(2)-Mg(4) bond lengths are 3.23 Å. All Mg(2)-Mg(3) bond lengths are 3.24 Å. Both Mg(2)-Mn(1) bond lengths are 3.32 Å. In the third Mg site, Mg(3) is bonded in a 12-coordinate geometry to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent La(1), and two equivalent Mn(1) atoms. There is one shorter (3.17 Å) and one longer (3.46 Å) Mg(3)-Mg(3) bond length. There is one shorter (3.22 Å) and one longer (3.42 Å) Mg(3)-Mg(4) bond length. There is one shorter (3.23 Å) and one longer (3.42 Å) Mg(3)-La(1) bond length. Both Mg(3)-Mn(1) bond lengths are 3.16 Å. In the fourth Mg site, Mg(4) is bonded to two equivalent Mg(2), four equivalent Mg(1), four equivalent Mg(3), and two equivalent La(1) atoms to form distorted MgLa2Mg10 cuboctahedra that share corners with four equivalent La(1)Mg10Mn2 cuboctahedra, corners with six equivalent Mg(4)La2Mg10 cuboctahedra, edges with two equivalent La(1)Mg10Mn2 cuboctahedra, edges with four equivalent Mg(2)Mg10Mn2 cuboctahedra, edges with eight equivalent Mg(1)La2Mg8Mn2 cuboctahedra, faces with two equivalent Mg(4)La2Mg10 cuboctahedra, faces with two equivalent Mg(2)Mg10Mn2 cuboctahedra, faces with two equivalent La(1)Mg10Mn2 cuboctahedra, faces with four equivalent Mg(1)La2Mg8Mn2 cuboctahedra, and faces with six equivalent Mn(1)La2Mg10 cuboctahedra. Both Mg(4)-La(1) bond lengths are 3.32 Å. La(1) is bonded to two equivalent Mg(4), four equivalent Mg(1), four equivalent Mg(3), and two equivalent Mn(1) atoms to form LaMg10Mn2 cuboctahedra that share corners with four equivalent Mg(4)La2Mg10 cuboctahedra, corners with six equivalent La(1)Mg10Mn2 cuboctahedra, edges with two equivalent Mg(4)La2Mg10 cuboctahedra, edges with four equivalent Mn(1)La2Mg10 cuboctahedra, edges with eight equivalent Mg(1)La2Mg8Mn2 cuboctahedra, faces with two equivalent Mg(4)La2Mg10 cuboctahedra, faces with two equivalent La(1)Mg10Mn2 cuboctahedra, faces with two equivalent Mn(1)La2Mg10 cuboctahedra, faces with four equivalent Mg(1)La2Mg8Mn2 cuboctahedra, and faces with six equivalent Mg(2)Mg10Mn2 cuboctahedra. Both La(1)-Mn(1) bond lengths are 3.16 Å. Mn(1) is bonded to two equivalent Mg(2), four equivalent Mg(1), four equivalent Mg(3), and two equivalent La(1) atoms to form MnLa2Mg10 cuboctahedra that share corners with four equivalent Mg(2)Mg10Mn2 cuboctahedra, corners with six equivalent Mn(1)La2Mg10 cuboctahedra, corners with eight equivalent Mg(1)La2Mg8Mn2 cuboctahedra, edges with two equivalent Mg(2)Mg10Mn2 cuboctahedra, edges with four equivalent Mg(1)La2Mg8Mn2 cuboctahedra, edges with four equivalent La(1)Mg10Mn2 cuboctahedra, faces with two equivalent Mg(2)Mg10Mn2 cuboctahedra, faces with two equivalent La(1)Mg10Mn2 cuboctahedra, faces with two equivalent Mn(1)La2Mg10 cuboctahedra, faces with four equivalent Mg(1)La2Mg8Mn2 cuboctahedra, and faces with six equivalent Mg(4)La2Mg10 cuboctahedra.