LiMg14SbO16 is alpha Po-derived structured and crystallizes in the orthorhombic Pmmm space group. Li(1) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(8) atoms to form LiO6 octahedra that share corners with two equivalent Li(1)O6 octahedra, corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Sb(1)O6 octahedra, edges with four equivalent Mg(3)O6 octahedra, edges with four equivalent Mg(5)O6 octahedra, and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedra are not tilted. There are eight inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent O(1); two equivalent O(6); and two O(9,9) atoms to form MgO6 octahedra that share corners with two equivalent Li(1)O6 octahedra, corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Mg(2)O6 octahedra, edges with four equivalent Mg(4)O6 octahedra, edges with four equivalent Mg(5)O6 octahedra, and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedra are not tilted. In the second Mg site, Mg(2) is bonded to two equivalent O(2); two equivalent O(7); and two O(9,9) atoms to form MgO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra; corners with two equivalent Mg(2)O6 octahedra; corners with two equivalent Sb(1)O6 octahedra; edges with four equivalent Mg(4)O6 octahedra; edges with four Mg(6,6)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedra are not tilted. In the third Mg site, Mg(3) is bonded to one O(4), one O(5), two equivalent O(3), and two equivalent O(8) atoms to form MgO6 octahedra that share corners with two equivalent Mg(4)O6 octahedra; corners with four equivalent Mg(3)O6 octahedra; edges with two equivalent Li(1)O6 octahedra; edges with two equivalent Mg(5)O6 octahedra; edges with two Mg(6,6)O6 octahedra; edges with two equivalent Sb(1)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-6°. In the fourth Mg site, Mg(4) is bonded to one O(6), one O(7), two equivalent O(3), and two equivalent O(9) atoms to form a mixture of edge and corner-sharing MgO6 octahedra. The corner-sharing octahedral tilt angles range from 0-6°. In the fifth Mg site, Mg(5) is bonded to one O(4), one O(6), two equivalent O(1), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Mg(6)O6 octahedra, corners with four equivalent Mg(5)O6 octahedra, edges with two equivalent Li(1)O6 octahedra, edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Mg(3)O6 octahedra, edges with two equivalent Mg(4)O6 octahedra, and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-7°. In the sixth Mg site, Mg(6) is bonded to one O(5), one O(7), two equivalent O(2), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Mg(5)O6 octahedra; corners with four Mg(6,6)O6 octahedra; edges with two equivalent Mg(2)O6 octahedra; edges with two equivalent Mg(3)O6 octahedra; edges with two equivalent Mg(4)O6 octahedra; edges with two equivalent Sb(1)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the seventh Mg site, Mg(6) is bonded to one O(5), one O(7), two equivalent O(2), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Mg(5)O6 octahedra; corners with four Mg(6,6)O6 octahedra; edges with two equivalent Mg(2)O6 octahedra; edges with two equivalent Mg(3)O6 octahedra; edges with two equivalent Mg(4)O6 octahedra; edges with two equivalent Sb(1)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the eighth Mg site, Mg(7) is bonded to one O(1), one O(2), one O(8), one O(9), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with six equivalent Mg(7)O6 octahedra,  an edgeedge with one Li(1)O6 octahedra,  an edgeedge with one Mg(1)O6 octahedra,  an edgeedge with one Mg(2)O6 octahedra,  an edgeedge with one Sb(1)O6 octahedra, edges with two equivalent Mg(3)O6 octahedra, edges with two equivalent Mg(4)O6 octahedra, edges with two equivalent Mg(5)O6 octahedra, and edges with two equivalent Mg(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-7°. Sb(1) is bonded to two equivalent O(2), two equivalent O(5), and two equivalent O(8) atoms to form SbO6 octahedra that share corners with two equivalent Li(1)O6 octahedra; corners with two equivalent Mg(2)O6 octahedra; corners with two equivalent Sb(1)O6 octahedra; edges with four equivalent Mg(3)O6 octahedra; edges with four Mg(6,6)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedra are not tilted. There are ten inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), one Mg(1), two equivalent Mg(5), and two equivalent Mg(7) atoms to form OLiMg5 octahedra that share corners with two equivalent O(2)Mg5Sb octahedra; corners with four equivalent O(1)LiMg5 octahedra; edges with two equivalent O(4)Li2Mg4 octahedra; edges with two equivalent O(8)LiMg4Sb octahedra; edges with two equivalent O(6)Mg6 octahedra; edges with two O(9,9)Mg6 octahedra; and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-7°. In the second O site, O(2) is bonded to one Mg(2), two equivalent Mg(6), two equivalent Mg(7), and one Sb(1) atom to form OMg5Sb octahedra that share corners with two equivalent O(1)LiMg5 octahedra; corners with four equivalent O(2)Mg5Sb octahedra; edges with two equivalent O(8)LiMg4Sb octahedra; edges with two equivalent O(5)Mg4Sb2 octahedra; edges with two equivalent O(7)Mg6 octahedra; edges with two O(9,9)Mg6 octahedra; and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the third O site, O(3) is bonded to one Mg(3), one Mg(4), one Mg(5), one Mg(6), and two equivalent Mg(7) atoms to form OMg6 octahedra that share corners with six equivalent O(3)Mg6 octahedra,  an edgeedge with one O(4)Li2Mg4 octahedra,  an edgeedge with one O(5)Mg4Sb2 octahedra,  an edgeedge with one O(6)Mg6 octahedra,  an edgeedge with one O(7)Mg6 octahedra, edges with two equivalent O(8)LiMg4Sb octahedra, edges with two equivalent O(1)LiMg5 octahedra, edges with two equivalent O(2)Mg5Sb octahedra, and edges with two equivalent O(9)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 2-10°. In the fourth O site, O(4) is bonded to two equivalent Li(1), two equivalent Mg(3), and two equivalent Mg(5) atoms to form OLi2Mg4 octahedra that share corners with two equivalent O(4)Li2Mg4 octahedra, corners with two equivalent O(5)Mg4Sb2 octahedra, corners with two equivalent O(6)Mg6 octahedra, edges with four equivalent O(8)LiMg4Sb octahedra, edges with four equivalent O(1)LiMg5 octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedra are not tilted. In the fifth O site, O(5) is bonded to two equivalent Mg(3); two Mg(6,6); and two equivalent Sb(1) atoms to form OMg4Sb2 octahedra that share corners with two equivalent O(4)Li2Mg4 octahedra, corners with two equivalent O(5)Mg4Sb2 octahedra, corners with two equivalent O(7)Mg6 octahedra, edges with four equivalent O(8)LiMg4Sb octahedra, edges with four equivalent O(2)Mg5Sb octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedra are not tilted. In the sixth O site, O(6) is bonded to two equivalent Mg(1), two equivalent Mg(4), and two equivalent Mg(5) atoms to form OMg6 octahedra that share corners with two equivalent O(4)Li2Mg4 octahedra; corners with two equivalent O(6)Mg6 octahedra; corners with two equivalent O(7)Mg6 octahedra; edges with four equivalent O(1)LiMg5 octahedra; edges with four equivalent O(3)Mg6 octahedra; and edges with four O(9,9)Mg6 octahedra. The corner-sharing octahedra are not tilted. In the seventh O site, O(7) is bonded to two equivalent Mg(2); two equivalent Mg(4); and two Mg(6,6) atoms to form OMg6 octahedra that share corners with two equivalent O(5)Mg4Sb2 octahedra; corners with two equivalent O(6)Mg6 octahedra; corners with two equivalent O(7)Mg6 octahedra; edges with four equivalent O(2)Mg5Sb octahedra; edges with four equivalent O(3)Mg6 octahedra; and edges with four O(9,9)Mg6 octahedra. The corner-sharing octahedra are not tilted. In the eighth O site, O(8) is bonded to one Li(1), two equivalent Mg(3), two equivalent Mg(7), and one Sb(1) atom to form OLiMg4Sb octahedra that share corners with two equivalent O(9)Mg6 octahedra, corners with four equivalent O(8)LiMg4Sb octahedra, edges with two equivalent O(4)Li2Mg4 octahedra, edges with two equivalent O(1)LiMg5 octahedra, edges with two equivalent O(5)Mg4Sb2 octahedra, edges with two equivalent O(2)Mg5Sb octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the ninth O site, O(9) is bonded to one Mg(1), one Mg(2), two equivalent Mg(4), and two equivalent Mg(7) atoms to form OMg6 octahedra that share corners with two equivalent O(8)LiMg4Sb octahedra; corners with four O(9,9)Mg6 octahedra; edges with two equivalent O(1)LiMg5 octahedra; edges with two equivalent O(2)Mg5Sb octahedra; edges with two equivalent O(6)Mg6 octahedra; edges with two equivalent O(7)Mg6 octahedra; and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the tenth O site, O(9) is bonded to one Mg(1), one Mg(2), two equivalent Mg(4), and two equivalent Mg(7) atoms to form OMg6 octahedra that share corners with two equivalent O(8)LiMg4Sb octahedra; corners with four O(9,9)Mg6 octahedra; edges with two equivalent O(1)LiMg5 octahedra; edges with two equivalent O(2)Mg5Sb octahedra; edges with two equivalent O(6)Mg6 octahedra; edges with two equivalent O(7)Mg6 octahedra; and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°.
LiMg14SbO16 is alpha Po-derived structured and crystallizes in the orthorhombic Pmmm space group. Li(1) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(8) atoms to form LiO6 octahedra that share corners with two equivalent Li(1)O6 octahedra, corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Sb(1)O6 octahedra, edges with four equivalent Mg(3)O6 octahedra, edges with four equivalent Mg(5)O6 octahedra, and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedra are not tilted. Both Li(1)-O(1) bond lengths are 2.25 Å. Both Li(1)-O(4) bond lengths are 2.16 Å. Both Li(1)-O(8) bond lengths are 2.08 Å. There are eight inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent O(1); two equivalent O(6); and two O(9,9) atoms to form MgO6 octahedra that share corners with two equivalent Li(1)O6 octahedra, corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Mg(2)O6 octahedra, edges with four equivalent Mg(4)O6 octahedra, edges with four equivalent Mg(5)O6 octahedra, and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedra are not tilted. Both Mg(1)-O(1) bond lengths are 2.07 Å. Both Mg(1)-O(6) bond lengths are 2.16 Å. Both Mg(1)-O(9,9) bond lengths are 2.17 Å. In the second Mg site, Mg(2) is bonded to two equivalent O(2); two equivalent O(7); and two O(9,9) atoms to form MgO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra; corners with two equivalent Mg(2)O6 octahedra; corners with two equivalent Sb(1)O6 octahedra; edges with four equivalent Mg(4)O6 octahedra; edges with four Mg(6,6)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedra are not tilted. Both Mg(2)-O(2) bond lengths are 2.04 Å. Both Mg(2)-O(7) bond lengths are 2.16 Å. Both Mg(2)-O(9,9) bond lengths are 2.15 Å. In the third Mg site, Mg(3) is bonded to one O(4), one O(5), two equivalent O(3), and two equivalent O(8) atoms to form MgO6 octahedra that share corners with two equivalent Mg(4)O6 octahedra; corners with four equivalent Mg(3)O6 octahedra; edges with two equivalent Li(1)O6 octahedra; edges with two equivalent Mg(5)O6 octahedra; edges with two Mg(6,6)O6 octahedra; edges with two equivalent Sb(1)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-6°. The Mg(3)-O(4) bond length is 1.99 Å. The Mg(3)-O(5) bond length is 2.32 Å. Both Mg(3)-O(3) bond lengths are 2.15 Å. Both Mg(3)-O(8) bond lengths are 2.17 Å. In the fourth Mg site, Mg(4) is bonded to one O(6), one O(7), two equivalent O(3), and two equivalent O(9) atoms to form a mixture of edge and corner-sharing MgO6 octahedra. The corner-sharing octahedral tilt angles range from 0-6°. The Mg(4)-O(6) bond length is 2.13 Å. The Mg(4)-O(7) bond length is 2.19 Å. Both Mg(4)-O(3) bond lengths are 2.17 Å. Both Mg(4)-O(9) bond lengths are 2.16 Å. In the fifth Mg site, Mg(5) is bonded to one O(4), one O(6), two equivalent O(1), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Mg(6)O6 octahedra, corners with four equivalent Mg(5)O6 octahedra, edges with two equivalent Li(1)O6 octahedra, edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Mg(3)O6 octahedra, edges with two equivalent Mg(4)O6 octahedra, and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-7°. The Mg(5)-O(4) bond length is 2.12 Å. The Mg(5)-O(6) bond length is 2.20 Å. Both Mg(5)-O(1) bond lengths are 2.17 Å. Both Mg(5)-O(3) bond lengths are 2.18 Å. In the sixth Mg site, Mg(6) is bonded to one O(5), one O(7), two equivalent O(2), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Mg(5)O6 octahedra; corners with four Mg(6,6)O6 octahedra; edges with two equivalent Mg(2)O6 octahedra; edges with two equivalent Mg(3)O6 octahedra; edges with two equivalent Mg(4)O6 octahedra; edges with two equivalent Sb(1)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. The Mg(6)-O(5) bond length is 2.26 Å. The Mg(6)-O(7) bond length is 2.06 Å. Both Mg(6)-O(2) bond lengths are 2.16 Å. Both Mg(6)-O(3) bond lengths are 2.14 Å. In the seventh Mg site, Mg(6) is bonded to one O(5), one O(7), two equivalent O(2), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Mg(5)O6 octahedra; corners with four Mg(6,6)O6 octahedra; edges with two equivalent Mg(2)O6 octahedra; edges with two equivalent Mg(3)O6 octahedra; edges with two equivalent Mg(4)O6 octahedra; edges with two equivalent Sb(1)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. The Mg(6)-O(5) bond length is 2.26 Å. The Mg(6)-O(7) bond length is 2.06 Å. Both Mg(6)-O(2) bond lengths are 2.16 Å. Both Mg(6)-O(3) bond lengths are 2.14 Å. In the eighth Mg site, Mg(7) is bonded to one O(1), one O(2), one O(8), one O(9), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with six equivalent Mg(7)O6 octahedra,  an edgeedge with one Li(1)O6 octahedra,  an edgeedge with one Mg(1)O6 octahedra,  an edgeedge with one Mg(2)O6 octahedra,  an edgeedge with one Sb(1)O6 octahedra, edges with two equivalent Mg(3)O6 octahedra, edges with two equivalent Mg(4)O6 octahedra, edges with two equivalent Mg(5)O6 octahedra, and edges with two equivalent Mg(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-7°. The Mg(7)-O(1) bond length is 2.06 Å. The Mg(7)-O(2) bond length is 2.26 Å. The Mg(7)-O(8) bond length is 2.18 Å. The Mg(7)-O(9) bond length is 2.14 Å. Both Mg(7)-O(3) bond lengths are 2.17 Å. Sb(1) is bonded to two equivalent O(2), two equivalent O(5), and two equivalent O(8) atoms to form SbO6 octahedra that share corners with two equivalent Li(1)O6 octahedra; corners with two equivalent Mg(2)O6 octahedra; corners with two equivalent Sb(1)O6 octahedra; edges with four equivalent Mg(3)O6 octahedra; edges with four Mg(6,6)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedra are not tilted. Both Sb(1)-O(2) bond lengths are 2.28 Å. Both Sb(1)-O(5) bond lengths are 2.16 Å. Both Sb(1)-O(8) bond lengths are 2.24 Å. There are ten inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), one Mg(1), two equivalent Mg(5), and two equivalent Mg(7) atoms to form OLiMg5 octahedra that share corners with two equivalent O(2)Mg5Sb octahedra; corners with four equivalent O(1)LiMg5 octahedra; edges with two equivalent O(4)Li2Mg4 octahedra; edges with two equivalent O(8)LiMg4Sb octahedra; edges with two equivalent O(6)Mg6 octahedra; edges with two O(9,9)Mg6 octahedra; and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-7°. In the second O site, O(2) is bonded to one Mg(2), two equivalent Mg(6), two equivalent Mg(7), and one Sb(1) atom to form OMg5Sb octahedra that share corners with two equivalent O(1)LiMg5 octahedra; corners with four equivalent O(2)Mg5Sb octahedra; edges with two equivalent O(8)LiMg4Sb octahedra; edges with two equivalent O(5)Mg4Sb2 octahedra; edges with two equivalent O(7)Mg6 octahedra; edges with two O(9,9)Mg6 octahedra; and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the third O site, O(3) is bonded to one Mg(3), one Mg(4), one Mg(5), one Mg(6), and two equivalent Mg(7) atoms to form OMg6 octahedra that share corners with six equivalent O(3)Mg6 octahedra,  an edgeedge with one O(4)Li2Mg4 octahedra,  an edgeedge with one O(5)Mg4Sb2 octahedra,  an edgeedge with one O(6)Mg6 octahedra,  an edgeedge with one O(7)Mg6 octahedra, edges with two equivalent O(8)LiMg4Sb octahedra, edges with two equivalent O(1)LiMg5 octahedra, edges with two equivalent O(2)Mg5Sb octahedra, and edges with two equivalent O(9)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 2-10°. In the fourth O site, O(4) is bonded to two equivalent Li(1), two equivalent Mg(3), and two equivalent Mg(5) atoms to form OLi2Mg4 octahedra that share corners with two equivalent O(4)Li2Mg4 octahedra, corners with two equivalent O(5)Mg4Sb2 octahedra, corners with two equivalent O(6)Mg6 octahedra, edges with four equivalent O(8)LiMg4Sb octahedra, edges with four equivalent O(1)LiMg5 octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedra are not tilted. In the fifth O site, O(5) is bonded to two equivalent Mg(3); two Mg(6,6); and two equivalent Sb(1) atoms to form OMg4Sb2 octahedra that share corners with two equivalent O(4)Li2Mg4 octahedra, corners with two equivalent O(5)Mg4Sb2 octahedra, corners with two equivalent O(7)Mg6 octahedra, edges with four equivalent O(8)LiMg4Sb octahedra, edges with four equivalent O(2)Mg5Sb octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedra are not tilted. In the sixth O site, O(6) is bonded to two equivalent Mg(1), two equivalent Mg(4), and two equivalent Mg(5) atoms to form OMg6 octahedra that share corners with two equivalent O(4)Li2Mg4 octahedra; corners with two equivalent O(6)Mg6 octahedra; corners with two equivalent O(7)Mg6 octahedra; edges with four equivalent O(1)LiMg5 octahedra; edges with four equivalent O(3)Mg6 octahedra; and edges with four O(9,9)Mg6 octahedra. The corner-sharing octahedra are not tilted. In the seventh O site, O(7) is bonded to two equivalent Mg(2); two equivalent Mg(4); and two Mg(6,6) atoms to form OMg6 octahedra that share corners with two equivalent O(5)Mg4Sb2 octahedra; corners with two equivalent O(6)Mg6 octahedra; corners with two equivalent O(7)Mg6 octahedra; edges with four equivalent O(2)Mg5Sb octahedra; edges with four equivalent O(3)Mg6 octahedra; and edges with four O(9,9)Mg6 octahedra. The corner-sharing octahedra are not tilted. In the eighth O site, O(8) is bonded to one Li(1), two equivalent Mg(3), two equivalent Mg(7), and one Sb(1) atom to form OLiMg4Sb octahedra that share corners with two equivalent O(9)Mg6 octahedra, corners with four equivalent O(8)LiMg4Sb octahedra, edges with two equivalent O(4)Li2Mg4 octahedra, edges with two equivalent O(1)LiMg5 octahedra, edges with two equivalent O(5)Mg4Sb2 octahedra, edges with two equivalent O(2)Mg5Sb octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the ninth O site, O(9) is bonded to one Mg(1), one Mg(2), two equivalent Mg(4), and two equivalent Mg(7) atoms to form OMg6 octahedra that share corners with two equivalent O(8)LiMg4Sb octahedra; corners with four O(9,9)Mg6 octahedra; edges with two equivalent O(1)LiMg5 octahedra; edges with two equivalent O(2)Mg5Sb octahedra; edges with two equivalent O(6)Mg6 octahedra; edges with two equivalent O(7)Mg6 octahedra; and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the tenth O site, O(9) is bonded to one Mg(1), one Mg(2), two equivalent Mg(4), and two equivalent Mg(7) atoms to form OMg6 octahedra that share corners with two equivalent O(8)LiMg4Sb octahedra; corners with four O(9,9)Mg6 octahedra; edges with two equivalent O(1)LiMg5 octahedra; edges with two equivalent O(2)Mg5Sb octahedra; edges with two equivalent O(6)Mg6 octahedra; edges with two equivalent O(7)Mg6 octahedra; and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. Both O(9)-Mg(4) bond lengths are 2.16 Å. Both O(9)-Mg(7) bond lengths are 2.14 Å.