Li2Mn3SbO8 is Spinel-derived structured and crystallizes in the monoclinic P2_1/c space group. Li(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form LiO4 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra, corners with three equivalent Sb(1)O6 octahedra, and corners with six equivalent Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-64°. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MnO6 octahedra that share corners with six equivalent Li(1)O4 tetrahedra, edges with two equivalent Sb(1)O6 octahedra, and edges with four equivalent Mn(2)O6 octahedra. In the second Mn site, Mn(2) is bonded to one O(2), one O(3), two equivalent O(1), and two equivalent O(4) atoms to form MnO6 octahedra that share corners with six equivalent Li(1)O4 tetrahedra, edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. Sb(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form SbO6 octahedra that share corners with six equivalent Li(1)O4 tetrahedra, edges with two equivalent Mn(1)O6 octahedra, and edges with four equivalent Mn(2)O6 octahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), one Mn(1), and two equivalent Mn(2) atoms to form OLiMn3 tetrahedra that share corners with three equivalent O(1)LiMn3 tetrahedra, corners with three equivalent O(4)LiMn2Sb trigonal pyramids, and  an edgeedge with one O(4)LiMn2Sb trigonal pyramid. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Li(1), one Mn(1), one Mn(2), and one Sb(1) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Li(1), one Mn(1), one Mn(2), and one Sb(1) atom. In the fourth O site, O(4) is bonded to one Li(1), two equivalent Mn(2), and one Sb(1) atom to form distorted OLiMn2Sb trigonal pyramids that share corners with three equivalent O(1)LiMn3 tetrahedra, corners with three equivalent O(4)LiMn2Sb trigonal pyramids, and  an edgeedge with one O(1)LiMn3 tetrahedra.
Li2Mn3SbO8 is Spinel-derived structured and crystallizes in the monoclinic P2_1/c space group. Li(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form LiO4 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra, corners with three equivalent Sb(1)O6 octahedra, and corners with six equivalent Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-64°. The Li(1)-O(1) bond length is 2.12 Å. The Li(1)-O(2) bond length is 1.97 Å. The Li(1)-O(3) bond length is 2.03 Å. The Li(1)-O(4) bond length is 2.10 Å. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MnO6 octahedra that share corners with six equivalent Li(1)O4 tetrahedra, edges with two equivalent Sb(1)O6 octahedra, and edges with four equivalent Mn(2)O6 octahedra. Both Mn(1)-O(1) bond lengths are 2.04 Å. Both Mn(1)-O(2) bond lengths are 2.21 Å. Both Mn(1)-O(3) bond lengths are 1.96 Å. In the second Mn site, Mn(2) is bonded to one O(2), one O(3), two equivalent O(1), and two equivalent O(4) atoms to form MnO6 octahedra that share corners with six equivalent Li(1)O4 tetrahedra, edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. The Mn(2)-O(2) bond length is 2.20 Å. The Mn(2)-O(3) bond length is 2.28 Å. Both Mn(2)-O(1) bond lengths are 1.96 Å. There is one shorter (2.02 Å) and one longer (2.04 Å) Mn(2)-O(4) bond length. Sb(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form SbO6 octahedra that share corners with six equivalent Li(1)O4 tetrahedra, edges with two equivalent Mn(1)O6 octahedra, and edges with four equivalent Mn(2)O6 octahedra. Both Sb(1)-O(2) bond lengths are 1.98 Å. Both Sb(1)-O(3) bond lengths are 2.03 Å. Both Sb(1)-O(4) bond lengths are 2.07 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), one Mn(1), and two equivalent Mn(2) atoms to form OLiMn3 tetrahedra that share corners with three equivalent O(1)LiMn3 tetrahedra, corners with three equivalent O(4)LiMn2Sb trigonal pyramids, and  an edgeedge with one O(4)LiMn2Sb trigonal pyramid. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Li(1), one Mn(1), one Mn(2), and one Sb(1) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Li(1), one Mn(1), one Mn(2), and one Sb(1) atom. In the fourth O site, O(4) is bonded to one Li(1), two equivalent Mn(2), and one Sb(1) atom to form distorted OLiMn2Sb trigonal pyramids that share corners with three equivalent O(1)LiMn3 tetrahedra, corners with three equivalent O(4)LiMn2Sb trigonal pyramids, and  an edgeedge with one O(1)LiMn3 tetrahedra.