LiCaMg14 crystallizes in the orthorhombic Amm2 space group. Li(1) is bonded to two equivalent Ca(1), two equivalent Mg(7), four equivalent Mg(3), and four equivalent Mg(5) atoms to form LiCa2Mg10 cuboctahedra that share corners with four equivalent Mg(1)Mg12 cuboctahedra, corners with six equivalent Li(1)Ca2Mg10 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Ca(1)Li2Mg10 cuboctahedra, edges with four equivalent Mg(3)Li2Ca2Mg8 cuboctahedra, edges with four equivalent Mg(7)LiMg11 cuboctahedra, edges with eight equivalent Mg(5)LiCaMg10 cuboctahedra, faces with two equivalent Ca(1)Li2Mg10 cuboctahedra, faces with two equivalent Mg(7)LiMg11 cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with four equivalent Mg(3)Li2Ca2Mg8 cuboctahedra, faces with four equivalent Mg(5)LiCaMg10 cuboctahedra, and faces with six equivalent Mg(6)CaMg11 cuboctahedra. Ca(1) is bonded to two equivalent Li(1), two equivalent Mg(6), four equivalent Mg(3), and four equivalent Mg(5) atoms to form CaLi2Mg10 cuboctahedra that share corners with four equivalent Mg(2)Mg12 cuboctahedra, corners with six equivalent Ca(1)Li2Mg10 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Li(1)Ca2Mg10 cuboctahedra, edges with four equivalent Mg(6)CaMg11 cuboctahedra, edges with four equivalent Mg(3)Li2Ca2Mg8 cuboctahedra, edges with eight equivalent Mg(5)LiCaMg10 cuboctahedra, faces with two equivalent Li(1)Ca2Mg10 cuboctahedra, faces with two equivalent Mg(6)CaMg11 cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with four equivalent Mg(3)Li2Ca2Mg8 cuboctahedra, faces with four equivalent Mg(5)LiCaMg10 cuboctahedra, and faces with six equivalent Mg(7)LiMg11 cuboctahedra. 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 Li(1)Ca2Mg10 cuboctahedra, corners with six equivalent Mg(1)Mg12 cuboctahedra, corners with eight equivalent Mg(3)Li2Ca2Mg8 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with four equivalent Mg(6)CaMg11 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with eight equivalent Mg(5)LiCaMg10 cuboctahedra, faces with two equivalent Ca(1)Li2Mg10 cuboctahedra, faces with two equivalent Mg(6)CaMg11 cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with four equivalent Mg(5)LiCaMg10 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, and faces with six equivalent Mg(7)LiMg11 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 Ca(1)Li2Mg10 cuboctahedra, corners with six equivalent Mg(2)Mg12 cuboctahedra, corners with eight equivalent Mg(3)Li2Ca2Mg8 cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with four equivalent Mg(7)LiMg11 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with eight equivalent Mg(5)LiCaMg10 cuboctahedra, faces with two equivalent Li(1)Ca2Mg10 cuboctahedra, faces with two equivalent Mg(7)LiMg11 cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with four equivalent Mg(5)LiCaMg10 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, and faces with six equivalent Mg(6)CaMg11 cuboctahedra. In the third Mg site, Mg(3) is bonded to two equivalent Li(1), two equivalent Ca(1), two equivalent Mg(3), two equivalent Mg(5), two equivalent Mg(6), and two equivalent Mg(7) atoms to form distorted MgLi2Ca2Mg8 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)Li2Ca2Mg8 cuboctahedra, edges with two equivalent Li(1)Ca2Mg10 cuboctahedra, edges with two equivalent Ca(1)Li2Mg10 cuboctahedra, edges with two equivalent Mg(3)Li2Ca2Mg8 cuboctahedra, edges with four equivalent Mg(6)CaMg11 cuboctahedra, edges with four equivalent Mg(5)LiCaMg10 cuboctahedra, edges with four equivalent Mg(7)LiMg11 cuboctahedra, faces with two equivalent Li(1)Ca2Mg10 cuboctahedra, faces with two equivalent Ca(1)Li2Mg10 cuboctahedra, faces with two equivalent Mg(6)CaMg11 cuboctahedra, faces with two equivalent Mg(3)Li2Ca2Mg8 cuboctahedra, faces with two equivalent Mg(7)LiMg11 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, and faces with eight equivalent Mg(5)LiCaMg10 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 Li(1)Ca2Mg10 cuboctahedra, corners with four equivalent Ca(1)Li2Mg10 cuboctahedra, corners with four equivalent Mg(3)Li2Ca2Mg8 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(6)CaMg11 cuboctahedra, edges with four equivalent Mg(5)LiCaMg10 cuboctahedra, edges with four equivalent Mg(7)LiMg11 cuboctahedra, faces with two equivalent Mg(6)CaMg11 cuboctahedra, faces with two equivalent Mg(3)Li2Ca2Mg8 cuboctahedra, faces with two equivalent Mg(7)LiMg11 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, and faces with eight equivalent Mg(5)LiCaMg10 cuboctahedra. In the fifth Mg site, Mg(5) is bonded to one Li(1), one Ca(1), one Mg(1), one Mg(2), one Mg(3), one Mg(4), two equivalent Mg(5), two equivalent Mg(6), and two equivalent Mg(7) atoms to form MgLiCaMg10 cuboctahedra that share corners with four equivalent Mg(6)CaMg11 cuboctahedra, corners with four equivalent Mg(7)LiMg11 cuboctahedra, corners with ten equivalent Mg(5)LiCaMg10 cuboctahedra, edges with two equivalent Li(1)Ca2Mg10 cuboctahedra, edges with two equivalent Ca(1)Li2Mg10 cuboctahedra, edges with two equivalent Mg(6)CaMg11 cuboctahedra, edges with two equivalent Mg(3)Li2Ca2Mg8 cuboctahedra, edges with two equivalent Mg(5)LiCaMg10 cuboctahedra, edges with two equivalent Mg(7)LiMg11 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,  a faceface with one Li(1)Ca2Mg10 cuboctahedra,  a faceface with one Ca(1)Li2Mg10 cuboctahedra,  a faceface with one Mg(1)Mg12 cuboctahedra,  a faceface with one Mg(2)Mg12 cuboctahedra, faces with two equivalent Mg(6)CaMg11 cuboctahedra, faces with two equivalent Mg(7)LiMg11 cuboctahedra, faces with four equivalent Mg(3)Li2Ca2Mg8 cuboctahedra, faces with four equivalent Mg(5)LiCaMg10 cuboctahedra, and faces with four equivalent Mg(4)Mg12 cuboctahedra. In the sixth Mg site, Mg(6) is bonded to one Ca(1), one Mg(1), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mg(7), and four equivalent Mg(5) atoms to form MgCaMg11 cuboctahedra that share corners with four equivalent Mg(7)LiMg11 cuboctahedra, corners with six equivalent Mg(6)CaMg11 cuboctahedra, corners with eight equivalent Mg(5)LiCaMg10 cuboctahedra, edges with two equivalent Ca(1)Li2Mg10 cuboctahedra, edges with two equivalent Mg(7)LiMg11 cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with four equivalent Mg(3)Li2Ca2Mg8 cuboctahedra, edges with four equivalent Mg(5)LiCaMg10 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra,  a faceface with one Ca(1)Li2Mg10 cuboctahedra,  a faceface with one Mg(1)Mg12 cuboctahedra, faces with two equivalent Mg(6)CaMg11 cuboctahedra, faces with two equivalent Mg(3)Li2Ca2Mg8 cuboctahedra, faces with two equivalent Mg(7)LiMg11 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with three equivalent Li(1)Ca2Mg10 cuboctahedra, faces with three equivalent Mg(2)Mg12 cuboctahedra, and faces with four equivalent Mg(5)LiCaMg10 cuboctahedra. In the seventh Mg site, Mg(7) is bonded to one Li(1), one Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mg(6), and four equivalent Mg(5) atoms to form distorted MgLiMg11 cuboctahedra that share corners with four equivalent Mg(6)CaMg11 cuboctahedra, corners with six equivalent Mg(7)LiMg11 cuboctahedra, corners with eight equivalent Mg(5)LiCaMg10 cuboctahedra, edges with two equivalent Li(1)Ca2Mg10 cuboctahedra, edges with two equivalent Mg(6)CaMg11 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with four equivalent Mg(3)Li2Ca2Mg8 cuboctahedra, edges with four equivalent Mg(5)LiCaMg10 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra,  a faceface with one Li(1)Ca2Mg10 cuboctahedra,  a faceface with one Mg(2)Mg12 cuboctahedra, faces with two equivalent Mg(6)CaMg11 cuboctahedra, faces with two equivalent Mg(3)Li2Ca2Mg8 cuboctahedra, faces with two equivalent Mg(7)LiMg11 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with three equivalent Ca(1)Li2Mg10 cuboctahedra, faces with three equivalent Mg(1)Mg12 cuboctahedra, and faces with four equivalent Mg(5)LiCaMg10 cuboctahedra.
LiCaMg14 crystallizes in the orthorhombic Amm2 space group. Li(1) is bonded to two equivalent Ca(1), two equivalent Mg(7), four equivalent Mg(3), and four equivalent Mg(5) atoms to form LiCa2Mg10 cuboctahedra that share corners with four equivalent Mg(1)Mg12 cuboctahedra, corners with six equivalent Li(1)Ca2Mg10 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Ca(1)Li2Mg10 cuboctahedra, edges with four equivalent Mg(3)Li2Ca2Mg8 cuboctahedra, edges with four equivalent Mg(7)LiMg11 cuboctahedra, edges with eight equivalent Mg(5)LiCaMg10 cuboctahedra, faces with two equivalent Ca(1)Li2Mg10 cuboctahedra, faces with two equivalent Mg(7)LiMg11 cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with four equivalent Mg(3)Li2Ca2Mg8 cuboctahedra, faces with four equivalent Mg(5)LiCaMg10 cuboctahedra, and faces with six equivalent Mg(6)CaMg11 cuboctahedra. Both Li(1)-Ca(1) bond lengths are 3.22 Å. Both Li(1)-Mg(7) bond lengths are 3.18 Å. There are two shorter (3.19 Å) and two longer (3.30 Å) Li(1)-Mg(3) bond lengths. All Li(1)-Mg(5) bond lengths are 3.25 Å. Ca(1) is bonded to two equivalent Li(1), two equivalent Mg(6), four equivalent Mg(3), and four equivalent Mg(5) atoms to form CaLi2Mg10 cuboctahedra that share corners with four equivalent Mg(2)Mg12 cuboctahedra, corners with six equivalent Ca(1)Li2Mg10 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Li(1)Ca2Mg10 cuboctahedra, edges with four equivalent Mg(6)CaMg11 cuboctahedra, edges with four equivalent Mg(3)Li2Ca2Mg8 cuboctahedra, edges with eight equivalent Mg(5)LiCaMg10 cuboctahedra, faces with two equivalent Li(1)Ca2Mg10 cuboctahedra, faces with two equivalent Mg(6)CaMg11 cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with four equivalent Mg(3)Li2Ca2Mg8 cuboctahedra, faces with four equivalent Mg(5)LiCaMg10 cuboctahedra, and faces with six equivalent Mg(7)LiMg11 cuboctahedra. Both Ca(1)-Mg(6) bond lengths are 3.28 Å. There are two shorter (3.24 Å) and two longer (3.25 Å) Ca(1)-Mg(3) bond lengths. All Ca(1)-Mg(5) bond lengths are 3.28 Å. 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 Li(1)Ca2Mg10 cuboctahedra, corners with six equivalent Mg(1)Mg12 cuboctahedra, corners with eight equivalent Mg(3)Li2Ca2Mg8 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with four equivalent Mg(6)CaMg11 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with eight equivalent Mg(5)LiCaMg10 cuboctahedra, faces with two equivalent Ca(1)Li2Mg10 cuboctahedra, faces with two equivalent Mg(6)CaMg11 cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with four equivalent Mg(5)LiCaMg10 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, and faces with six equivalent Mg(7)LiMg11 cuboctahedra. Both Mg(1)-Mg(2) bond lengths are 3.22 Å. Both Mg(1)-Mg(6) bond lengths are 3.17 Å. There are two shorter (3.24 Å) and two longer (3.25 Å) Mg(1)-Mg(4) bond lengths. All Mg(1)-Mg(5) bond lengths are 3.17 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 Ca(1)Li2Mg10 cuboctahedra, corners with six equivalent Mg(2)Mg12 cuboctahedra, corners with eight equivalent Mg(3)Li2Ca2Mg8 cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with four equivalent Mg(7)LiMg11 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with eight equivalent Mg(5)LiCaMg10 cuboctahedra, faces with two equivalent Li(1)Ca2Mg10 cuboctahedra, faces with two equivalent Mg(7)LiMg11 cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with four equivalent Mg(5)LiCaMg10 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, and faces with six equivalent Mg(6)CaMg11 cuboctahedra. Both Mg(2)-Mg(7) bond lengths are 3.25 Å. All Mg(2)-Mg(4) bond lengths are 3.24 Å. All Mg(2)-Mg(5) bond lengths are 3.15 Å. In the third Mg site, Mg(3) is bonded to two equivalent Li(1), two equivalent Ca(1), two equivalent Mg(3), two equivalent Mg(5), two equivalent Mg(6), and two equivalent Mg(7) atoms to form distorted MgLi2Ca2Mg8 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)Li2Ca2Mg8 cuboctahedra, edges with two equivalent Li(1)Ca2Mg10 cuboctahedra, edges with two equivalent Ca(1)Li2Mg10 cuboctahedra, edges with two equivalent Mg(3)Li2Ca2Mg8 cuboctahedra, edges with four equivalent Mg(6)CaMg11 cuboctahedra, edges with four equivalent Mg(5)LiCaMg10 cuboctahedra, edges with four equivalent Mg(7)LiMg11 cuboctahedra, faces with two equivalent Li(1)Ca2Mg10 cuboctahedra, faces with two equivalent Ca(1)Li2Mg10 cuboctahedra, faces with two equivalent Mg(6)CaMg11 cuboctahedra, faces with two equivalent Mg(3)Li2Ca2Mg8 cuboctahedra, faces with two equivalent Mg(7)LiMg11 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, and faces with eight equivalent Mg(5)LiCaMg10 cuboctahedra. There is one shorter (3.16 Å) and one longer (3.27 Å) Mg(3)-Mg(3) bond length. Both Mg(3)-Mg(5) bond lengths are 3.25 Å. Both Mg(3)-Mg(6) bond lengths are 3.25 Å. Both Mg(3)-Mg(7) bond lengths are 3.19 Å. 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 Li(1)Ca2Mg10 cuboctahedra, corners with four equivalent Ca(1)Li2Mg10 cuboctahedra, corners with four equivalent Mg(3)Li2Ca2Mg8 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(6)CaMg11 cuboctahedra, edges with four equivalent Mg(5)LiCaMg10 cuboctahedra, edges with four equivalent Mg(7)LiMg11 cuboctahedra, faces with two equivalent Mg(6)CaMg11 cuboctahedra, faces with two equivalent Mg(3)Li2Ca2Mg8 cuboctahedra, faces with two equivalent Mg(7)LiMg11 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, and faces with eight equivalent Mg(5)LiCaMg10 cuboctahedra. Both Mg(4)-Mg(4) bond lengths are 3.22 Å. Both Mg(4)-Mg(5) bond lengths are 3.15 Å. Both Mg(4)-Mg(6) bond lengths are 3.14 Å. Both Mg(4)-Mg(7) bond lengths are 3.25 Å. In the fifth Mg site, Mg(5) is bonded to one Li(1), one Ca(1), one Mg(1), one Mg(2), one Mg(3), one Mg(4), two equivalent Mg(5), two equivalent Mg(6), and two equivalent Mg(7) atoms to form MgLiCaMg10 cuboctahedra that share corners with four equivalent Mg(6)CaMg11 cuboctahedra, corners with four equivalent Mg(7)LiMg11 cuboctahedra, corners with ten equivalent Mg(5)LiCaMg10 cuboctahedra, edges with two equivalent Li(1)Ca2Mg10 cuboctahedra, edges with two equivalent Ca(1)Li2Mg10 cuboctahedra, edges with two equivalent Mg(6)CaMg11 cuboctahedra, edges with two equivalent Mg(3)Li2Ca2Mg8 cuboctahedra, edges with two equivalent Mg(5)LiCaMg10 cuboctahedra, edges with two equivalent Mg(7)LiMg11 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,  a faceface with one Li(1)Ca2Mg10 cuboctahedra,  a faceface with one Ca(1)Li2Mg10 cuboctahedra,  a faceface with one Mg(1)Mg12 cuboctahedra,  a faceface with one Mg(2)Mg12 cuboctahedra, faces with two equivalent Mg(6)CaMg11 cuboctahedra, faces with two equivalent Mg(7)LiMg11 cuboctahedra, faces with four equivalent Mg(3)Li2Ca2Mg8 cuboctahedra, faces with four equivalent Mg(5)LiCaMg10 cuboctahedra, and faces with four equivalent Mg(4)Mg12 cuboctahedra. There is one shorter (3.18 Å) and one longer (3.26 Å) Mg(5)-Mg(5) bond length. There is one shorter (3.20 Å) and one longer (3.29 Å) Mg(5)-Mg(6) bond length. There is one shorter (3.24 Å) and one longer (3.25 Å) Mg(5)-Mg(7) bond length. In the sixth Mg site, Mg(6) is bonded to one Ca(1), one Mg(1), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mg(7), and four equivalent Mg(5) atoms to form MgCaMg11 cuboctahedra that share corners with four equivalent Mg(7)LiMg11 cuboctahedra, corners with six equivalent Mg(6)CaMg11 cuboctahedra, corners with eight equivalent Mg(5)LiCaMg10 cuboctahedra, edges with two equivalent Ca(1)Li2Mg10 cuboctahedra, edges with two equivalent Mg(7)LiMg11 cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with four equivalent Mg(3)Li2Ca2Mg8 cuboctahedra, edges with four equivalent Mg(5)LiCaMg10 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra,  a faceface with one Ca(1)Li2Mg10 cuboctahedra,  a faceface with one Mg(1)Mg12 cuboctahedra, faces with two equivalent Mg(6)CaMg11 cuboctahedra, faces with two equivalent Mg(3)Li2Ca2Mg8 cuboctahedra, faces with two equivalent Mg(7)LiMg11 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with three equivalent Li(1)Ca2Mg10 cuboctahedra, faces with three equivalent Mg(2)Mg12 cuboctahedra, and faces with four equivalent Mg(5)LiCaMg10 cuboctahedra. Both Mg(6)-Mg(7) bond lengths are 3.22 Å. In the seventh Mg site, Mg(7) is bonded to one Li(1), one Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mg(6), and four equivalent Mg(5) atoms to form distorted MgLiMg11 cuboctahedra that share corners with four equivalent Mg(6)CaMg11 cuboctahedra, corners with six equivalent Mg(7)LiMg11 cuboctahedra, corners with eight equivalent Mg(5)LiCaMg10 cuboctahedra, edges with two equivalent Li(1)Ca2Mg10 cuboctahedra, edges with two equivalent Mg(6)CaMg11 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with four equivalent Mg(3)Li2Ca2Mg8 cuboctahedra, edges with four equivalent Mg(5)LiCaMg10 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra,  a faceface with one Li(1)Ca2Mg10 cuboctahedra,  a faceface with one Mg(2)Mg12 cuboctahedra, faces with two equivalent Mg(6)CaMg11 cuboctahedra, faces with two equivalent Mg(3)Li2Ca2Mg8 cuboctahedra, faces with two equivalent Mg(7)LiMg11 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with three equivalent Ca(1)Li2Mg10 cuboctahedra, faces with three equivalent Mg(1)Mg12 cuboctahedra, and faces with four equivalent Mg(5)LiCaMg10 cuboctahedra.