Li3Nb2Fe3O10 crystallizes in the triclinic P1 space group. There are three inequivalent Li sites. In the first Li site, Li(1) is bonded in a 3-coordinate geometry to one O(1), one O(10), one O(2), one O(5), and one O(8) atom. In the second Li site, Li(2) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(4), one O(6), and one O(9) atom. In the third Li site, Li(3) is bonded to one O(10), one O(2), one O(5), one O(7), and one O(8) atom to form distorted LiO5 square pyramids that share  a cornercorner with one Nb(1)O6 octahedra,  a cornercorner with one Nb(2)O6 octahedra,  a cornercorner with one Fe(1)O6 octahedra, corners with two equivalent Fe(2)O6 octahedra, corners with two equivalent Fe(3)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Fe(3)O6 octahedra, and edges with two equivalent Nb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 4-91°. There are two inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to one O(1), one O(3), one O(4), one O(6), one O(8), and one O(9) atom to form distorted NbO6 octahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Li(3)O5 square pyramid,  an edgeedge with one Nb(2)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Fe(3)O6 octahedra, and edges with two equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles are 10°. In the second Nb site, Nb(2) is bonded to one O(10), one O(2), one O(3), one O(5), one O(7), and one O(8) atom to form distorted NbO6 octahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Li(3)O5 square pyramid,  an edgeedge with one Nb(1)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, and edges with two equivalent Li(3)O5 square pyramids. The corner-sharing octahedral tilt angles are 4°. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(2), one O(4), one O(5), one O(6), one O(7), and one O(9) atom to form FeO6 octahedra that share  a cornercorner with one Nb(1)O6 octahedra,  a cornercorner with one Nb(2)O6 octahedra,  a cornercorner with one Fe(2)O6 octahedra,  a cornercorner with one Fe(3)O6 octahedra,  a cornercorner with one Li(3)O5 square pyramid,  an edgeedge with one Nb(1)O6 octahedra,  an edgeedge with one Nb(2)O6 octahedra, edges with two equivalent Fe(2)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, and  an edgeedge with one Li(3)O5 square pyramid. The corner-sharing octahedral tilt angles range from 4-11°. In the second Fe site, Fe(2) is bonded to one O(1), one O(4), one O(5), one O(6), one O(7), and one O(9) atom to form distorted FeO6 octahedra that share  a cornercorner with one Fe(1)O6 octahedra, corners with two equivalent Li(3)O5 square pyramids,  an edgeedge with one Nb(2)O6 octahedra, edges with two equivalent Nb(1)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, and edges with two equivalent Fe(3)O6 octahedra. The corner-sharing octahedral tilt angles are 9°. In the third Fe site, Fe(3) is bonded to one O(10), one O(2), one O(4), one O(5), one O(6), and one O(7) atom to form FeO6 octahedra that share  a cornercorner with one Fe(1)O6 octahedra, corners with two equivalent Li(3)O5 square pyramids,  an edgeedge with one Nb(1)O6 octahedra, edges with two equivalent Nb(2)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(2)O6 octahedra, and  an edgeedge with one Li(3)O5 square pyramid. The corner-sharing octahedral tilt angles are 11°. There are ten inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), one Li(2), one Nb(1), and one Fe(2) atom to form OLi2NbFe tetrahedra that share corners with two equivalent O(5)Li2NbFe3 octahedra,  a cornercorner with one O(2)Li2NbFe2 square pyramid,  a cornercorner with one O(4)LiNbFe3 square pyramid,  a cornercorner with one O(6)LiNbFe3 square pyramid,  a cornercorner with one O(7)LiNbFe3 square pyramid,  a cornercorner with one O(10)Li2NbFe tetrahedra, corners with three equivalent O(9)LiNbFe2 tetrahedra,  an edgeedge with one O(4)LiNbFe3 square pyramid, and  an edgeedge with one O(6)LiNbFe3 square pyramid. The corner-sharing octahedral tilt angles range from 7-38°. In the second O site, O(2) is bonded to one Li(1), one Li(3), one Nb(2), one Fe(1), and one Fe(3) atom to form distorted OLi2NbFe2 square pyramids that share  a cornercorner with one O(5)Li2NbFe3 octahedra, corners with two equivalent O(4)LiNbFe3 square pyramids,  a cornercorner with one O(1)Li2NbFe tetrahedra,  a cornercorner with one O(9)LiNbFe2 tetrahedra, corners with two equivalent O(10)Li2NbFe tetrahedra, edges with two equivalent O(5)Li2NbFe3 octahedra,  an edgeedge with one O(6)LiNbFe3 square pyramid, edges with two equivalent O(7)LiNbFe3 square pyramids, and  an edgeedge with one O(10)Li2NbFe tetrahedra. The corner-sharing octahedral tilt angles are 15°. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Li(2), one Nb(1), and one Nb(2) atom. In the fourth O site, O(4) is bonded to one Li(2), one Nb(1), one Fe(1), one Fe(2), and one Fe(3) atom to form distorted OLiNbFe3 square pyramids that share  a cornercorner with one O(5)Li2NbFe3 octahedra,  a cornercorner with one O(6)LiNbFe3 square pyramid,  a cornercorner with one O(7)LiNbFe3 square pyramid, corners with two equivalent O(2)Li2NbFe2 square pyramids,  a cornercorner with one O(1)Li2NbFe tetrahedra,  a cornercorner with one O(10)Li2NbFe tetrahedra,  an edgeedge with one O(5)Li2NbFe3 octahedra,  an edgeedge with one O(7)LiNbFe3 square pyramid, edges with two equivalent O(6)LiNbFe3 square pyramids,  an edgeedge with one O(1)Li2NbFe tetrahedra, and edges with two equivalent O(9)LiNbFe2 tetrahedra. The corner-sharing octahedral tilt angles are 85°. In the fifth O site, O(5) is bonded to one Li(1), one Li(3), one Nb(2), one Fe(1), one Fe(2), and one Fe(3) atom to form distorted OLi2NbFe3 octahedra that share  a cornercorner with one O(2)Li2NbFe2 square pyramid,  a cornercorner with one O(4)LiNbFe3 square pyramid,  a cornercorner with one O(6)LiNbFe3 square pyramid,  a cornercorner with one O(7)LiNbFe3 square pyramid, corners with two equivalent O(1)Li2NbFe tetrahedra,  an edgeedge with one O(4)LiNbFe3 square pyramid,  an edgeedge with one O(6)LiNbFe3 square pyramid, edges with two equivalent O(2)Li2NbFe2 square pyramids, edges with two equivalent O(7)LiNbFe3 square pyramids,  an edgeedge with one O(9)LiNbFe2 tetrahedra, and edges with two equivalent O(10)Li2NbFe tetrahedra. In the sixth O site, O(6) is bonded to one Li(2), one Nb(1), one Fe(1), one Fe(2), and one Fe(3) atom to form OLiNbFe3 square pyramids that share  a cornercorner with one O(5)Li2NbFe3 octahedra,  a cornercorner with one O(4)LiNbFe3 square pyramid,  a cornercorner with one O(7)LiNbFe3 square pyramid,  a cornercorner with one O(1)Li2NbFe tetrahedra,  a cornercorner with one O(10)Li2NbFe tetrahedra, corners with two equivalent O(9)LiNbFe2 tetrahedra,  an edgeedge with one O(5)Li2NbFe3 octahedra,  an edgeedge with one O(2)Li2NbFe2 square pyramid,  an edgeedge with one O(7)LiNbFe3 square pyramid, edges with two equivalent O(4)LiNbFe3 square pyramids,  an edgeedge with one O(1)Li2NbFe tetrahedra, and  an edgeedge with one O(9)LiNbFe2 tetrahedra. The corner-sharing octahedral tilt angles are 3°. In the seventh O site, O(7) is bonded to one Li(3), one Nb(2), one Fe(1), one Fe(2), and one Fe(3) atom to form distorted OLiNbFe3 square pyramids that share  a cornercorner with one O(5)Li2NbFe3 octahedra,  a cornercorner with one O(4)LiNbFe3 square pyramid,  a cornercorner with one O(6)LiNbFe3 square pyramid,  a cornercorner with one O(1)Li2NbFe tetrahedra,  a cornercorner with one O(10)Li2NbFe tetrahedra, corners with two equivalent O(9)LiNbFe2 tetrahedra, edges with two equivalent O(5)Li2NbFe3 octahedra,  an edgeedge with one O(4)LiNbFe3 square pyramid,  an edgeedge with one O(6)LiNbFe3 square pyramid, edges with two equivalent O(2)Li2NbFe2 square pyramids, and  an edgeedge with one O(10)Li2NbFe tetrahedra. The corner-sharing octahedral tilt angles are 5°. In the eighth O site, O(8) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Li(3), one Nb(1), and one Nb(2) atom. In the ninth O site, O(9) is bonded to one Li(2), one Nb(1), one Fe(1), and one Fe(2) atom to form OLiNbFe2 tetrahedra that share  a cornercorner with one O(2)Li2NbFe2 square pyramid, corners with two equivalent O(6)LiNbFe3 square pyramids, corners with two equivalent O(7)LiNbFe3 square pyramids, corners with three equivalent O(1)Li2NbFe tetrahedra,  an edgeedge with one O(5)Li2NbFe3 octahedra,  an edgeedge with one O(6)LiNbFe3 square pyramid, and edges with two equivalent O(4)LiNbFe3 square pyramids. In the tenth O site, O(10) is bonded to one Li(1), one Li(3), one Nb(2), and one Fe(3) atom to form distorted OLi2NbFe tetrahedra that share  a cornercorner with one O(4)LiNbFe3 square pyramid,  a cornercorner with one O(6)LiNbFe3 square pyramid,  a cornercorner with one O(7)LiNbFe3 square pyramid, corners with two equivalent O(2)Li2NbFe2 square pyramids,  a cornercorner with one O(1)Li2NbFe tetrahedra, edges with two equivalent O(5)Li2NbFe3 octahedra,  an edgeedge with one O(2)Li2NbFe2 square pyramid, and  an edgeedge with one O(7)LiNbFe3 square pyramid.
Li3Nb2Fe3O10 crystallizes in the triclinic P1 space group. There are three inequivalent Li sites. In the first Li site, Li(1) is bonded in a 3-coordinate geometry to one O(1), one O(10), one O(2), one O(5), and one O(8) atom. The Li(1)-O(1) bond length is 1.97 Å. The Li(1)-O(10) bond length is 1.98 Å. The Li(1)-O(2) bond length is 2.05 Å. The Li(1)-O(5) bond length is 2.63 Å. The Li(1)-O(8) bond length is 2.55 Å. In the second Li site, Li(2) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(4), one O(6), and one O(9) atom. The Li(2)-O(1) bond length is 2.01 Å. The Li(2)-O(3) bond length is 2.08 Å. The Li(2)-O(4) bond length is 2.13 Å. The Li(2)-O(6) bond length is 2.44 Å. The Li(2)-O(9) bond length is 2.07 Å. In the third Li site, Li(3) is bonded to one O(10), one O(2), one O(5), one O(7), and one O(8) atom to form distorted LiO5 square pyramids that share  a cornercorner with one Nb(1)O6 octahedra,  a cornercorner with one Nb(2)O6 octahedra,  a cornercorner with one Fe(1)O6 octahedra, corners with two equivalent Fe(2)O6 octahedra, corners with two equivalent Fe(3)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Fe(3)O6 octahedra, and edges with two equivalent Nb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 4-91°. The Li(3)-O(10) bond length is 2.06 Å. The Li(3)-O(2) bond length is 2.20 Å. The Li(3)-O(5) bond length is 2.23 Å. The Li(3)-O(7) bond length is 2.05 Å. The Li(3)-O(8) bond length is 2.12 Å. There are two inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to one O(1), one O(3), one O(4), one O(6), one O(8), and one O(9) atom to form distorted NbO6 octahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Li(3)O5 square pyramid,  an edgeedge with one Nb(2)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Fe(3)O6 octahedra, and edges with two equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles are 10°. The Nb(1)-O(1) bond length is 1.94 Å. The Nb(1)-O(3) bond length is 2.16 Å. The Nb(1)-O(4) bond length is 2.22 Å. The Nb(1)-O(6) bond length is 2.02 Å. The Nb(1)-O(8) bond length is 1.90 Å. The Nb(1)-O(9) bond length is 2.03 Å. In the second Nb site, Nb(2) is bonded to one O(10), one O(2), one O(3), one O(5), one O(7), and one O(8) atom to form distorted NbO6 octahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Li(3)O5 square pyramid,  an edgeedge with one Nb(1)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, and edges with two equivalent Li(3)O5 square pyramids. The corner-sharing octahedral tilt angles are 4°. The Nb(2)-O(10) bond length is 1.92 Å. The Nb(2)-O(2) bond length is 2.13 Å. The Nb(2)-O(3) bond length is 1.90 Å. The Nb(2)-O(5) bond length is 1.97 Å. The Nb(2)-O(7) bond length is 2.20 Å. The Nb(2)-O(8) bond length is 2.16 Å. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(2), one O(4), one O(5), one O(6), one O(7), and one O(9) atom to form FeO6 octahedra that share  a cornercorner with one Nb(1)O6 octahedra,  a cornercorner with one Nb(2)O6 octahedra,  a cornercorner with one Fe(2)O6 octahedra,  a cornercorner with one Fe(3)O6 octahedra,  a cornercorner with one Li(3)O5 square pyramid,  an edgeedge with one Nb(1)O6 octahedra,  an edgeedge with one Nb(2)O6 octahedra, edges with two equivalent Fe(2)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, and  an edgeedge with one Li(3)O5 square pyramid. The corner-sharing octahedral tilt angles range from 4-11°. The Fe(1)-O(2) bond length is 2.01 Å. The Fe(1)-O(4) bond length is 2.03 Å. The Fe(1)-O(5) bond length is 2.19 Å. The Fe(1)-O(6) bond length is 2.12 Å. The Fe(1)-O(7) bond length is 2.05 Å. The Fe(1)-O(9) bond length is 2.00 Å. In the second Fe site, Fe(2) is bonded to one O(1), one O(4), one O(5), one O(6), one O(7), and one O(9) atom to form distorted FeO6 octahedra that share  a cornercorner with one Fe(1)O6 octahedra, corners with two equivalent Li(3)O5 square pyramids,  an edgeedge with one Nb(2)O6 octahedra, edges with two equivalent Nb(1)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, and edges with two equivalent Fe(3)O6 octahedra. The corner-sharing octahedral tilt angles are 9°. The Fe(2)-O(1) bond length is 2.04 Å. The Fe(2)-O(4) bond length is 2.16 Å. The Fe(2)-O(5) bond length is 2.50 Å. The Fe(2)-O(6) bond length is 2.14 Å. The Fe(2)-O(7) bond length is 2.17 Å. The Fe(2)-O(9) bond length is 2.08 Å. In the third Fe site, Fe(3) is bonded to one O(10), one O(2), one O(4), one O(5), one O(6), and one O(7) atom to form FeO6 octahedra that share  a cornercorner with one Fe(1)O6 octahedra, corners with two equivalent Li(3)O5 square pyramids,  an edgeedge with one Nb(1)O6 octahedra, edges with two equivalent Nb(2)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(2)O6 octahedra, and  an edgeedge with one Li(3)O5 square pyramid. The corner-sharing octahedral tilt angles are 11°. The Fe(3)-O(10) bond length is 2.06 Å. The Fe(3)-O(2) bond length is 2.14 Å. The Fe(3)-O(4) bond length is 2.22 Å. The Fe(3)-O(5) bond length is 2.17 Å. The Fe(3)-O(6) bond length is 2.22 Å. The Fe(3)-O(7) bond length is 2.16 Å. There are ten inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), one Li(2), one Nb(1), and one Fe(2) atom to form OLi2NbFe tetrahedra that share corners with two equivalent O(5)Li2NbFe3 octahedra,  a cornercorner with one O(2)Li2NbFe2 square pyramid,  a cornercorner with one O(4)LiNbFe3 square pyramid,  a cornercorner with one O(6)LiNbFe3 square pyramid,  a cornercorner with one O(7)LiNbFe3 square pyramid,  a cornercorner with one O(10)Li2NbFe tetrahedra, corners with three equivalent O(9)LiNbFe2 tetrahedra,  an edgeedge with one O(4)LiNbFe3 square pyramid, and  an edgeedge with one O(6)LiNbFe3 square pyramid. The corner-sharing octahedral tilt angles range from 7-38°. In the second O site, O(2) is bonded to one Li(1), one Li(3), one Nb(2), one Fe(1), and one Fe(3) atom to form distorted OLi2NbFe2 square pyramids that share  a cornercorner with one O(5)Li2NbFe3 octahedra, corners with two equivalent O(4)LiNbFe3 square pyramids,  a cornercorner with one O(1)Li2NbFe tetrahedra,  a cornercorner with one O(9)LiNbFe2 tetrahedra, corners with two equivalent O(10)Li2NbFe tetrahedra, edges with two equivalent O(5)Li2NbFe3 octahedra,  an edgeedge with one O(6)LiNbFe3 square pyramid, edges with two equivalent O(7)LiNbFe3 square pyramids, and  an edgeedge with one O(10)Li2NbFe tetrahedra. The corner-sharing octahedral tilt angles are 15°. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Li(2), one Nb(1), and one Nb(2) atom. In the fourth O site, O(4) is bonded to one Li(2), one Nb(1), one Fe(1), one Fe(2), and one Fe(3) atom to form distorted OLiNbFe3 square pyramids that share  a cornercorner with one O(5)Li2NbFe3 octahedra,  a cornercorner with one O(6)LiNbFe3 square pyramid,  a cornercorner with one O(7)LiNbFe3 square pyramid, corners with two equivalent O(2)Li2NbFe2 square pyramids,  a cornercorner with one O(1)Li2NbFe tetrahedra,  a cornercorner with one O(10)Li2NbFe tetrahedra,  an edgeedge with one O(5)Li2NbFe3 octahedra,  an edgeedge with one O(7)LiNbFe3 square pyramid, edges with two equivalent O(6)LiNbFe3 square pyramids,  an edgeedge with one O(1)Li2NbFe tetrahedra, and edges with two equivalent O(9)LiNbFe2 tetrahedra. The corner-sharing octahedral tilt angles are 85°. In the fifth O site, O(5) is bonded to one Li(1), one Li(3), one Nb(2), one Fe(1), one Fe(2), and one Fe(3) atom to form distorted OLi2NbFe3 octahedra that share  a cornercorner with one O(2)Li2NbFe2 square pyramid,  a cornercorner with one O(4)LiNbFe3 square pyramid,  a cornercorner with one O(6)LiNbFe3 square pyramid,  a cornercorner with one O(7)LiNbFe3 square pyramid, corners with two equivalent O(1)Li2NbFe tetrahedra,  an edgeedge with one O(4)LiNbFe3 square pyramid,  an edgeedge with one O(6)LiNbFe3 square pyramid, edges with two equivalent O(2)Li2NbFe2 square pyramids, edges with two equivalent O(7)LiNbFe3 square pyramids,  an edgeedge with one O(9)LiNbFe2 tetrahedra, and edges with two equivalent O(10)Li2NbFe tetrahedra. In the sixth O site, O(6) is bonded to one Li(2), one Nb(1), one Fe(1), one Fe(2), and one Fe(3) atom to form OLiNbFe3 square pyramids that share  a cornercorner with one O(5)Li2NbFe3 octahedra,  a cornercorner with one O(4)LiNbFe3 square pyramid,  a cornercorner with one O(7)LiNbFe3 square pyramid,  a cornercorner with one O(1)Li2NbFe tetrahedra,  a cornercorner with one O(10)Li2NbFe tetrahedra, corners with two equivalent O(9)LiNbFe2 tetrahedra,  an edgeedge with one O(5)Li2NbFe3 octahedra,  an edgeedge with one O(2)Li2NbFe2 square pyramid,  an edgeedge with one O(7)LiNbFe3 square pyramid, edges with two equivalent O(4)LiNbFe3 square pyramids,  an edgeedge with one O(1)Li2NbFe tetrahedra, and  an edgeedge with one O(9)LiNbFe2 tetrahedra. The corner-sharing octahedral tilt angles are 3°. In the seventh O site, O(7) is bonded to one Li(3), one Nb(2), one Fe(1), one Fe(2), and one Fe(3) atom to form distorted OLiNbFe3 square pyramids that share  a cornercorner with one O(5)Li2NbFe3 octahedra,  a cornercorner with one O(4)LiNbFe3 square pyramid,  a cornercorner with one O(6)LiNbFe3 square pyramid,  a cornercorner with one O(1)Li2NbFe tetrahedra,  a cornercorner with one O(10)Li2NbFe tetrahedra, corners with two equivalent O(9)LiNbFe2 tetrahedra, edges with two equivalent O(5)Li2NbFe3 octahedra,  an edgeedge with one O(4)LiNbFe3 square pyramid,  an edgeedge with one O(6)LiNbFe3 square pyramid, edges with two equivalent O(2)Li2NbFe2 square pyramids, and  an edgeedge with one O(10)Li2NbFe tetrahedra. The corner-sharing octahedral tilt angles are 5°. In the eighth O site, O(8) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Li(3), one Nb(1), and one Nb(2) atom. In the ninth O site, O(9) is bonded to one Li(2), one Nb(1), one Fe(1), and one Fe(2) atom to form OLiNbFe2 tetrahedra that share  a cornercorner with one O(2)Li2NbFe2 square pyramid, corners with two equivalent O(6)LiNbFe3 square pyramids, corners with two equivalent O(7)LiNbFe3 square pyramids, corners with three equivalent O(1)Li2NbFe tetrahedra,  an edgeedge with one O(5)Li2NbFe3 octahedra,  an edgeedge with one O(6)LiNbFe3 square pyramid, and edges with two equivalent O(4)LiNbFe3 square pyramids. In the tenth O site, O(10) is bonded to one Li(1), one Li(3), one Nb(2), and one Fe(3) atom to form distorted OLi2NbFe tetrahedra that share  a cornercorner with one O(4)LiNbFe3 square pyramid,  a cornercorner with one O(6)LiNbFe3 square pyramid,  a cornercorner with one O(7)LiNbFe3 square pyramid, corners with two equivalent O(2)Li2NbFe2 square pyramids,  a cornercorner with one O(1)Li2NbFe tetrahedra, edges with two equivalent O(5)Li2NbFe3 octahedra,  an edgeedge with one O(2)Li2NbFe2 square pyramid, and  an edgeedge with one O(7)LiNbFe3 square pyramid.