Li4Nb2Mn3Cu3O16 is Hausmannite-derived structured and crystallizes in the triclinic P1 space group. There are four inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(11), one O(12), one O(15), and one O(3) atom to form LiO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra,  a cornercorner with one Cu(1)O6 octahedra,  a cornercorner with one Cu(2)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra, corners with two equivalent Mn(3)O6 octahedra, corners with two equivalent Cu(3)O6 octahedra, and corners with three equivalent Nb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-67°. In the second Li site, Li(2) is bonded to one O(14), one O(16), one O(5), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Mn(2)O6 octahedra,  a cornercorner with one Mn(3)O6 octahedra,  a cornercorner with one Cu(3)O6 octahedra, corners with three equivalent Nb(2)O6 octahedra,  an edgeedge with one Mn(1)O6 octahedra,  an edgeedge with one Cu(1)O6 octahedra, and  an edgeedge with one Cu(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-65°. In the third Li site, Li(3) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(10), one O(4), and one O(6) atom. In the fourth Li site, Li(4) is bonded to one O(13), one O(2), one O(7), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Mn(2)O6 octahedra,  a cornercorner with one Mn(3)O6 octahedra,  a cornercorner with one Cu(3)O6 octahedra, corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Cu(1)O6 octahedra, corners with two equivalent Cu(2)O6 octahedra, and corners with three equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-69°. There are two inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to one O(1), one O(10), one O(2), one O(6), one O(7), and one O(8) atom to form NbO6 octahedra that share corners with two equivalent Mn(2)O6 octahedra, corners with two equivalent Mn(3)O6 octahedra, corners with two equivalent Cu(3)O6 octahedra, corners with three equivalent Li(4)O4 tetrahedra,  an edgeedge with one Mn(1)O6 octahedra,  an edgeedge with one Cu(1)O6 octahedra, and  an edgeedge with one Cu(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-54°. In the second Nb site, Nb(2) is bonded to one O(11), one O(12), one O(14), one O(15), one O(16), and one O(9) atom to form distorted NbO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Cu(1)O6 octahedra, corners with two equivalent Cu(2)O6 octahedra, corners with three equivalent Li(1)O4 tetrahedra, corners with three equivalent Li(2)O4 tetrahedra,  an edgeedge with one Mn(2)O6 octahedra,  an edgeedge with one Mn(3)O6 octahedra, and  an edgeedge with one Cu(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-58°. There are three inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(14), one O(16), one O(3), one O(4), one O(7), and one O(8) atom to form MnO6 octahedra that share corners with two equivalent Nb(2)O6 octahedra,  a cornercorner with one Li(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra,  an edgeedge with one Nb(1)O6 octahedra, edges with two equivalent Cu(1)O6 octahedra, edges with two equivalent Cu(2)O6 octahedra, and  an edgeedge with one Li(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 42-49°. In the second Mn site, Mn(2) is bonded to one O(1), one O(10), one O(11), one O(13), one O(15), and one O(5) atom to form MnO6 octahedra that share corners with two equivalent Nb(1)O6 octahedra,  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra,  an edgeedge with one Nb(2)O6 octahedra, edges with two equivalent Mn(3)O6 octahedra, and edges with two equivalent Cu(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-54°. In the third Mn site, Mn(3) is bonded to one O(10), one O(12), one O(13), one O(15), one O(5), and one O(6) atom to form MnO6 octahedra that share corners with two equivalent Nb(1)O6 octahedra,  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra,  an edgeedge with one Nb(2)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with two equivalent Cu(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-50°. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(14), one O(2), one O(3), one O(4), one O(7), and one O(9) atom to form distorted CuO6 octahedra that share corners with two equivalent Nb(2)O6 octahedra,  a cornercorner with one Li(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra,  an edgeedge with one Nb(1)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Cu(2)O6 octahedra, and  an edgeedge with one Li(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-57°. In the second Cu site, Cu(2) is bonded to one O(16), one O(2), one O(3), one O(4), one O(8), and one O(9) atom to form distorted CuO6 octahedra that share corners with two equivalent Nb(2)O6 octahedra,  a cornercorner with one Li(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra,  an edgeedge with one Nb(1)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Cu(1)O6 octahedra, and  an edgeedge with one Li(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-58°. In the third Cu site, Cu(3) is bonded to one O(1), one O(11), one O(12), one O(13), one O(5), and one O(6) atom to form CuO6 octahedra that share corners with two equivalent Nb(1)O6 octahedra,  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra,  an edgeedge with one Nb(2)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with two equivalent Mn(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-53°. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Li(3), one Nb(1), one Mn(2), and one Cu(3) atom. In the second O site, O(2) is bonded to one Li(4), one Nb(1), one Cu(1), and one Cu(2) atom to form distorted OLiNbCu2 tetrahedra that share  a cornercorner with one O(13)LiMn2Cu tetrahedra, corners with two equivalent O(4)LiMnCu2 tetrahedra, and  an edgeedge with one O(3)LiMnCu2 tetrahedra. In the third O site, O(3) is bonded to one Li(1), one Mn(1), one Cu(1), and one Cu(2) atom to form OLiMnCu2 tetrahedra that share  a cornercorner with one O(15)LiMn2Nb tetrahedra,  a cornercorner with one O(11)LiMnNbCu tetrahedra,  a cornercorner with one O(12)LiMnNbCu tetrahedra, corners with three equivalent O(4)LiMnCu2 tetrahedra, and  an edgeedge with one O(2)LiNbCu2 tetrahedra. In the fourth O site, O(4) is bonded to one Li(3), one Mn(1), one Cu(1), and one Cu(2) atom to form OLiMnCu2 tetrahedra that share corners with two equivalent O(2)LiNbCu2 tetrahedra and corners with three equivalent O(3)LiMnCu2 tetrahedra. In the fifth O site, O(5) is bonded to one Li(2), one Mn(2), one Mn(3), and one Cu(3) atom to form OLiMn2Cu tetrahedra that share corners with two equivalent O(15)LiMn2Nb tetrahedra, corners with two equivalent O(11)LiMnNbCu tetrahedra, corners with two equivalent O(12)LiMnNbCu tetrahedra, and corners with three equivalent O(13)LiMn2Cu tetrahedra. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Li(3), one Nb(1), one Mn(3), and one Cu(3) atom. In the seventh O site, O(7) is bonded in a distorted rectangular see-saw-like geometry to one Li(4), one Nb(1), one Mn(1), and one Cu(1) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Li(4), one Nb(1), one Mn(1), and one Cu(2) atom. In the ninth O site, O(9) is bonded in a rectangular see-saw-like geometry to one Li(2), one Nb(2), one Cu(1), and one Cu(2) atom. In the tenth O site, O(10) is bonded in a rectangular see-saw-like geometry to one Li(3), one Nb(1), one Mn(2), and one Mn(3) atom. In the eleventh O site, O(11) is bonded to one Li(1), one Nb(2), one Mn(2), and one Cu(3) atom to form distorted OLiMnNbCu tetrahedra that share  a cornercorner with one O(15)LiMn2Nb tetrahedra,  a cornercorner with one O(3)LiMnCu2 tetrahedra,  a cornercorner with one O(12)LiMnNbCu tetrahedra, corners with two equivalent O(5)LiMn2Cu tetrahedra,  an edgeedge with one O(13)LiMn2Cu tetrahedra,  an edgeedge with one O(15)LiMn2Nb tetrahedra, and  an edgeedge with one O(12)LiMnNbCu tetrahedra. In the twelfth O site, O(12) is bonded to one Li(1), one Nb(2), one Mn(3), and one Cu(3) atom to form distorted OLiMnNbCu tetrahedra that share  a cornercorner with one O(15)LiMn2Nb tetrahedra,  a cornercorner with one O(3)LiMnCu2 tetrahedra,  a cornercorner with one O(11)LiMnNbCu tetrahedra, corners with two equivalent O(5)LiMn2Cu tetrahedra,  an edgeedge with one O(13)LiMn2Cu tetrahedra,  an edgeedge with one O(15)LiMn2Nb tetrahedra, and  an edgeedge with one O(11)LiMnNbCu tetrahedra. In the thirteenth O site, O(13) is bonded to one Li(4), one Mn(2), one Mn(3), and one Cu(3) atom to form distorted OLiMn2Cu tetrahedra that share  a cornercorner with one O(2)LiNbCu2 tetrahedra, corners with three equivalent O(5)LiMn2Cu tetrahedra,  an edgeedge with one O(15)LiMn2Nb tetrahedra,  an edgeedge with one O(11)LiMnNbCu tetrahedra, and  an edgeedge with one O(12)LiMnNbCu tetrahedra. In the fourteenth O site, O(14) is bonded in a rectangular see-saw-like geometry to one Li(2), one Nb(2), one Mn(1), and one Cu(1) atom. In the fifteenth O site, O(15) is bonded to one Li(1), one Nb(2), one Mn(2), and one Mn(3) atom to form distorted OLiMn2Nb tetrahedra that share  a cornercorner with one O(3)LiMnCu2 tetrahedra,  a cornercorner with one O(11)LiMnNbCu tetrahedra,  a cornercorner with one O(12)LiMnNbCu tetrahedra, corners with two equivalent O(5)LiMn2Cu tetrahedra,  an edgeedge with one O(13)LiMn2Cu tetrahedra,  an edgeedge with one O(11)LiMnNbCu tetrahedra, and  an edgeedge with one O(12)LiMnNbCu tetrahedra. In the sixteenth O site, O(16) is bonded in a distorted rectangular see-saw-like geometry to one Li(2), one Nb(2), one Mn(1), and one Cu(2) atom.
Li4Nb2Mn3Cu3O16 is Hausmannite-derived structured and crystallizes in the triclinic P1 space group. There are four inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(11), one O(12), one O(15), and one O(3) atom to form LiO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra,  a cornercorner with one Cu(1)O6 octahedra,  a cornercorner with one Cu(2)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra, corners with two equivalent Mn(3)O6 octahedra, corners with two equivalent Cu(3)O6 octahedra, and corners with three equivalent Nb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-67°. The Li(1)-O(11) bond length is 1.94 Å. The Li(1)-O(12) bond length is 1.98 Å. The Li(1)-O(15) bond length is 2.14 Å. The Li(1)-O(3) bond length is 2.12 Å. In the second Li site, Li(2) is bonded to one O(14), one O(16), one O(5), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Mn(2)O6 octahedra,  a cornercorner with one Mn(3)O6 octahedra,  a cornercorner with one Cu(3)O6 octahedra, corners with three equivalent Nb(2)O6 octahedra,  an edgeedge with one Mn(1)O6 octahedra,  an edgeedge with one Cu(1)O6 octahedra, and  an edgeedge with one Cu(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-65°. The Li(2)-O(14) bond length is 1.97 Å. The Li(2)-O(16) bond length is 1.95 Å. The Li(2)-O(5) bond length is 1.85 Å. The Li(2)-O(9) bond length is 1.94 Å. In the third Li site, Li(3) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(10), one O(4), and one O(6) atom. The Li(3)-O(1) bond length is 1.98 Å. The Li(3)-O(10) bond length is 1.99 Å. The Li(3)-O(4) bond length is 1.86 Å. The Li(3)-O(6) bond length is 2.02 Å. In the fourth Li site, Li(4) is bonded to one O(13), one O(2), one O(7), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Mn(2)O6 octahedra,  a cornercorner with one Mn(3)O6 octahedra,  a cornercorner with one Cu(3)O6 octahedra, corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Cu(1)O6 octahedra, corners with two equivalent Cu(2)O6 octahedra, and corners with three equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-69°. The Li(4)-O(13) bond length is 2.09 Å. The Li(4)-O(2) bond length is 1.94 Å. The Li(4)-O(7) bond length is 1.96 Å. The Li(4)-O(8) bond length is 1.95 Å. There are two inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to one O(1), one O(10), one O(2), one O(6), one O(7), and one O(8) atom to form NbO6 octahedra that share corners with two equivalent Mn(2)O6 octahedra, corners with two equivalent Mn(3)O6 octahedra, corners with two equivalent Cu(3)O6 octahedra, corners with three equivalent Li(4)O4 tetrahedra,  an edgeedge with one Mn(1)O6 octahedra,  an edgeedge with one Cu(1)O6 octahedra, and  an edgeedge with one Cu(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-54°. The Nb(1)-O(1) bond length is 1.96 Å. The Nb(1)-O(10) bond length is 2.32 Å. The Nb(1)-O(2) bond length is 1.91 Å. The Nb(1)-O(6) bond length is 1.96 Å. The Nb(1)-O(7) bond length is 2.15 Å. The Nb(1)-O(8) bond length is 2.04 Å. In the second Nb site, Nb(2) is bonded to one O(11), one O(12), one O(14), one O(15), one O(16), and one O(9) atom to form distorted NbO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Cu(1)O6 octahedra, corners with two equivalent Cu(2)O6 octahedra, corners with three equivalent Li(1)O4 tetrahedra, corners with three equivalent Li(2)O4 tetrahedra,  an edgeedge with one Mn(2)O6 octahedra,  an edgeedge with one Mn(3)O6 octahedra, and  an edgeedge with one Cu(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-58°. The Nb(2)-O(11) bond length is 2.13 Å. The Nb(2)-O(12) bond length is 2.17 Å. The Nb(2)-O(14) bond length is 1.97 Å. The Nb(2)-O(15) bond length is 2.23 Å. The Nb(2)-O(16) bond length is 1.94 Å. The Nb(2)-O(9) bond length is 1.87 Å. There are three inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(14), one O(16), one O(3), one O(4), one O(7), and one O(8) atom to form MnO6 octahedra that share corners with two equivalent Nb(2)O6 octahedra,  a cornercorner with one Li(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra,  an edgeedge with one Nb(1)O6 octahedra, edges with two equivalent Cu(1)O6 octahedra, edges with two equivalent Cu(2)O6 octahedra, and  an edgeedge with one Li(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 42-49°. The Mn(1)-O(14) bond length is 2.04 Å. The Mn(1)-O(16) bond length is 2.03 Å. The Mn(1)-O(3) bond length is 1.94 Å. The Mn(1)-O(4) bond length is 1.93 Å. The Mn(1)-O(7) bond length is 1.91 Å. The Mn(1)-O(8) bond length is 1.92 Å. In the second Mn site, Mn(2) is bonded to one O(1), one O(10), one O(11), one O(13), one O(15), and one O(5) atom to form MnO6 octahedra that share corners with two equivalent Nb(1)O6 octahedra,  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra,  an edgeedge with one Nb(2)O6 octahedra, edges with two equivalent Mn(3)O6 octahedra, and edges with two equivalent Cu(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-54°. The Mn(2)-O(1) bond length is 2.02 Å. The Mn(2)-O(10) bond length is 1.99 Å. The Mn(2)-O(11) bond length is 1.88 Å. The Mn(2)-O(13) bond length is 1.95 Å. The Mn(2)-O(15) bond length is 1.99 Å. The Mn(2)-O(5) bond length is 1.95 Å. In the third Mn site, Mn(3) is bonded to one O(10), one O(12), one O(13), one O(15), one O(5), and one O(6) atom to form MnO6 octahedra that share corners with two equivalent Nb(1)O6 octahedra,  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra,  an edgeedge with one Nb(2)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with two equivalent Cu(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-50°. The Mn(3)-O(10) bond length is 1.98 Å. The Mn(3)-O(12) bond length is 1.89 Å. The Mn(3)-O(13) bond length is 1.94 Å. The Mn(3)-O(15) bond length is 1.99 Å. The Mn(3)-O(5) bond length is 1.94 Å. The Mn(3)-O(6) bond length is 2.03 Å. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(14), one O(2), one O(3), one O(4), one O(7), and one O(9) atom to form distorted CuO6 octahedra that share corners with two equivalent Nb(2)O6 octahedra,  a cornercorner with one Li(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra,  an edgeedge with one Nb(1)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Cu(2)O6 octahedra, and  an edgeedge with one Li(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-57°. The Cu(1)-O(14) bond length is 2.18 Å. The Cu(1)-O(2) bond length is 2.23 Å. The Cu(1)-O(3) bond length is 1.91 Å. The Cu(1)-O(4) bond length is 1.91 Å. The Cu(1)-O(7) bond length is 2.25 Å. The Cu(1)-O(9) bond length is 2.24 Å. In the second Cu site, Cu(2) is bonded to one O(16), one O(2), one O(3), one O(4), one O(8), and one O(9) atom to form distorted CuO6 octahedra that share corners with two equivalent Nb(2)O6 octahedra,  a cornercorner with one Li(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra,  an edgeedge with one Nb(1)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Cu(1)O6 octahedra, and  an edgeedge with one Li(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-58°. The Cu(2)-O(16) bond length is 2.31 Å. The Cu(2)-O(2) bond length is 2.03 Å. The Cu(2)-O(3) bond length is 1.92 Å. The Cu(2)-O(4) bond length is 1.92 Å. The Cu(2)-O(8) bond length is 2.46 Å. The Cu(2)-O(9) bond length is 2.06 Å. In the third Cu site, Cu(3) is bonded to one O(1), one O(11), one O(12), one O(13), one O(5), and one O(6) atom to form CuO6 octahedra that share corners with two equivalent Nb(1)O6 octahedra,  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra,  an edgeedge with one Nb(2)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with two equivalent Mn(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-53°. The Cu(3)-O(1) bond length is 2.22 Å. The Cu(3)-O(11) bond length is 2.23 Å. The Cu(3)-O(12) bond length is 2.12 Å. The Cu(3)-O(13) bond length is 1.97 Å. The Cu(3)-O(5) bond length is 1.95 Å. The Cu(3)-O(6) bond length is 2.12 Å. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Li(3), one Nb(1), one Mn(2), and one Cu(3) atom. In the second O site, O(2) is bonded to one Li(4), one Nb(1), one Cu(1), and one Cu(2) atom to form distorted OLiNbCu2 tetrahedra that share  a cornercorner with one O(13)LiMn2Cu tetrahedra, corners with two equivalent O(4)LiMnCu2 tetrahedra, and  an edgeedge with one O(3)LiMnCu2 tetrahedra. In the third O site, O(3) is bonded to one Li(1), one Mn(1), one Cu(1), and one Cu(2) atom to form OLiMnCu2 tetrahedra that share  a cornercorner with one O(15)LiMn2Nb tetrahedra,  a cornercorner with one O(11)LiMnNbCu tetrahedra,  a cornercorner with one O(12)LiMnNbCu tetrahedra, corners with three equivalent O(4)LiMnCu2 tetrahedra, and  an edgeedge with one O(2)LiNbCu2 tetrahedra. In the fourth O site, O(4) is bonded to one Li(3), one Mn(1), one Cu(1), and one Cu(2) atom to form OLiMnCu2 tetrahedra that share corners with two equivalent O(2)LiNbCu2 tetrahedra and corners with three equivalent O(3)LiMnCu2 tetrahedra. In the fifth O site, O(5) is bonded to one Li(2), one Mn(2), one Mn(3), and one Cu(3) atom to form OLiMn2Cu tetrahedra that share corners with two equivalent O(15)LiMn2Nb tetrahedra, corners with two equivalent O(11)LiMnNbCu tetrahedra, corners with two equivalent O(12)LiMnNbCu tetrahedra, and corners with three equivalent O(13)LiMn2Cu tetrahedra. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Li(3), one Nb(1), one Mn(3), and one Cu(3) atom. In the seventh O site, O(7) is bonded in a distorted rectangular see-saw-like geometry to one Li(4), one Nb(1), one Mn(1), and one Cu(1) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Li(4), one Nb(1), one Mn(1), and one Cu(2) atom. In the ninth O site, O(9) is bonded in a rectangular see-saw-like geometry to one Li(2), one Nb(2), one Cu(1), and one Cu(2) atom. In the tenth O site, O(10) is bonded in a rectangular see-saw-like geometry to one Li(3), one Nb(1), one Mn(2), and one Mn(3) atom. In the eleventh O site, O(11) is bonded to one Li(1), one Nb(2), one Mn(2), and one Cu(3) atom to form distorted OLiMnNbCu tetrahedra that share  a cornercorner with one O(15)LiMn2Nb tetrahedra,  a cornercorner with one O(3)LiMnCu2 tetrahedra,  a cornercorner with one O(12)LiMnNbCu tetrahedra, corners with two equivalent O(5)LiMn2Cu tetrahedra,  an edgeedge with one O(13)LiMn2Cu tetrahedra,  an edgeedge with one O(15)LiMn2Nb tetrahedra, and  an edgeedge with one O(12)LiMnNbCu tetrahedra. In the twelfth O site, O(12) is bonded to one Li(1), one Nb(2), one Mn(3), and one Cu(3) atom to form distorted OLiMnNbCu tetrahedra that share  a cornercorner with one O(15)LiMn2Nb tetrahedra,  a cornercorner with one O(3)LiMnCu2 tetrahedra,  a cornercorner with one O(11)LiMnNbCu tetrahedra, corners with two equivalent O(5)LiMn2Cu tetrahedra,  an edgeedge with one O(13)LiMn2Cu tetrahedra,  an edgeedge with one O(15)LiMn2Nb tetrahedra, and  an edgeedge with one O(11)LiMnNbCu tetrahedra. In the thirteenth O site, O(13) is bonded to one Li(4), one Mn(2), one Mn(3), and one Cu(3) atom to form distorted OLiMn2Cu tetrahedra that share  a cornercorner with one O(2)LiNbCu2 tetrahedra, corners with three equivalent O(5)LiMn2Cu tetrahedra,  an edgeedge with one O(15)LiMn2Nb tetrahedra,  an edgeedge with one O(11)LiMnNbCu tetrahedra, and  an edgeedge with one O(12)LiMnNbCu tetrahedra. In the fourteenth O site, O(14) is bonded in a rectangular see-saw-like geometry to one Li(2), one Nb(2), one Mn(1), and one Cu(1) atom. In the fifteenth O site, O(15) is bonded to one Li(1), one Nb(2), one Mn(2), and one Mn(3) atom to form distorted OLiMn2Nb tetrahedra that share  a cornercorner with one O(3)LiMnCu2 tetrahedra,  a cornercorner with one O(11)LiMnNbCu tetrahedra,  a cornercorner with one O(12)LiMnNbCu tetrahedra, corners with two equivalent O(5)LiMn2Cu tetrahedra,  an edgeedge with one O(13)LiMn2Cu tetrahedra,  an edgeedge with one O(11)LiMnNbCu tetrahedra, and  an edgeedge with one O(12)LiMnNbCu tetrahedra. In the sixteenth O site, O(16) is bonded in a distorted rectangular see-saw-like geometry to one Li(2), one Nb(2), one Mn(1), and one Cu(2) atom.