Li16Fe4SiO16 is Aluminum carbonitride-derived structured and crystallizes in the triclinic P1 space group. There are sixteen inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(1), one O(13), one O(16), and one O(4) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Fe(3)O4 tetrahedra,  a cornercorner with one Fe(4)O4 tetrahedra, corners with two equivalent Li(16)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and  an edgeedge with one Li(11)O4 tetrahedra. In the second Li site, Li(2) is bonded in a 4-coordinate geometry to one O(14), one O(15), one O(2), and one O(6) atom. In the third Li site, Li(3) is bonded to one O(15), one O(4), one O(5), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra,  an edgeedge with one Li(15)O4 tetrahedra, and  an edgeedge with one Li(8)O4 tetrahedra. In the fourth Li site, Li(4) is bonded in a 4-coordinate geometry to one O(10), one O(16), one O(3), and one O(6) atom. In the fifth Li site, Li(5) is bonded in a 3-coordinate geometry to one O(16), one O(3), and one O(7) atom. In the sixth Li site, Li(6) is bonded in a 3-coordinate geometry to one O(15), one O(5), one O(8), and one O(9) atom. In the seventh Li site, Li(7) is bonded in a 3-coordinate geometry to one O(14), one O(6), one O(8), and one O(9) atom. In the eighth Li site, Li(8) is bonded to one O(11), one O(5), one O(8), and one O(9) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Li(11)O4 tetrahedra,  a cornercorner with one Li(12)O4 tetrahedra,  a cornercorner with one Fe(1)O4 tetrahedra,  a cornercorner with one Fe(2)O4 tetrahedra, corners with two equivalent Li(15)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra, and  an edgeedge with one Li(3)O4 tetrahedra. In the ninth Li site, Li(9) is bonded to one O(10), one O(12), one O(3), and one O(7) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(11)O4 tetrahedra,  a cornercorner with one Li(12)O4 tetrahedra,  a cornercorner with one Fe(1)O4 tetrahedra,  a cornercorner with one Fe(2)O4 tetrahedra, corners with two equivalent Li(16)O4 tetrahedra, corners with two equivalent Fe(4)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. In the tenth Li site, Li(10) is bonded in a 4-coordinate geometry to one O(14), one O(6), one O(8), and one O(9) atom. In the eleventh Li site, Li(11) is bonded to one O(1), one O(11), one O(13), and one O(7) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Li(15)O4 tetrahedra,  a cornercorner with one Li(16)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra,  an edgeedge with one Li(1)O4 tetrahedra, and  an edgeedge with one Si(1)O4 tetrahedra. In the twelfth Li site, Li(12) is bonded to one O(12), one O(14), one O(2), and one O(8) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Li(15)O4 tetrahedra,  a cornercorner with one Li(16)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra, and corners with two equivalent Fe(4)O4 tetrahedra. In the thirteenth Li site, Li(13) is bonded in a 4-coordinate geometry to one O(1), one O(10), one O(13), and one O(16) atom. In the fourteenth Li site, Li(14) is bonded in a 3-coordinate geometry to one O(14), one O(15), one O(2), and one O(6) atom. In the fifteenth Li site, Li(15) is bonded to one O(11), one O(15), one O(2), and one O(5) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Li(11)O4 tetrahedra,  a cornercorner with one Li(12)O4 tetrahedra,  a cornercorner with one Fe(1)O4 tetrahedra,  a cornercorner with one Fe(2)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra, and  an edgeedge with one Li(3)O4 tetrahedra. In the sixteenth Li site, Li(16) is bonded to one O(1), one O(12), one O(16), and one O(3) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Li(11)O4 tetrahedra,  a cornercorner with one Li(12)O4 tetrahedra,  a cornercorner with one Fe(1)O4 tetrahedra,  a cornercorner with one Fe(2)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(9)O4 tetrahedra, and corners with two equivalent Fe(4)O4 tetrahedra. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(4), one O(5), and one O(7) atom to form FeO4 tetrahedra that share  a cornercorner with one Li(15)O4 tetrahedra,  a cornercorner with one Li(16)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(11)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. In the second Fe site, Fe(2) is bonded to one O(2), one O(3), one O(6), and one O(8) atom to form FeO4 tetrahedra that share  a cornercorner with one Li(15)O4 tetrahedra,  a cornercorner with one Li(16)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra, and corners with two equivalent Li(12)O4 tetrahedra. In the third Fe site, Fe(3) is bonded to one O(11), one O(13), one O(15), and one O(9) atom to form FeO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Li(11)O4 tetrahedra, corners with two equivalent Li(15)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, and corners with two equivalent Li(8)O4 tetrahedra. In the fourth Fe site, Fe(4) is bonded to one O(10), one O(12), one O(14), and one O(16) atom to form FeO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Li(12)O4 tetrahedra, corners with two equivalent Li(16)O4 tetrahedra, and corners with two equivalent Li(9)O4 tetrahedra. Si(1) is bonded to one O(10), one O(13), one O(4), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Fe(3)O4 tetrahedra,  a cornercorner with one Fe(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(9)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, and  an edgeedge with one Li(11)O4 tetrahedra. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Li(1), one Li(11), one Li(13), one Li(16), and one Fe(1) atom. In the second O site, O(2) is bonded to one Li(12), one Li(14), one Li(15), one Li(2), and one Fe(2) atom to form distorted OLi4Fe trigonal bipyramids that share  a cornercorner with one O(11)Li3Fe tetrahedra,  a cornercorner with one O(12)Li3Fe tetrahedra, and  a cornercorner with one O(3)Li4Fe trigonal bipyramid. In the third O site, O(3) is bonded to one Li(16), one Li(4), one Li(5), one Li(9), and one Fe(2) atom to form distorted OLi4Fe trigonal bipyramids that share  a cornercorner with one O(16)Li5Fe pentagonal pyramid, corners with two equivalent O(12)Li3Fe tetrahedra,  a cornercorner with one O(2)Li4Fe trigonal bipyramid,  an edgeedge with one O(16)Li5Fe pentagonal pyramid, and  an edgeedge with one O(7)Li3FeSi trigonal bipyramid. In the fourth O site, O(4) is bonded to one Li(1), one Li(3), one Fe(1), and one Si(1) atom to form distorted OLi2FeSi tetrahedra that share  a cornercorner with one O(16)Li5Fe pentagonal pyramid and corners with two equivalent O(7)Li3FeSi trigonal bipyramids. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one Li(15), one Li(3), one Li(6), one Li(8), and one Fe(1) atom. In the sixth O site, O(6) is bonded in a 6-coordinate geometry to one Li(10), one Li(14), one Li(2), one Li(4), one Li(7), and one Fe(2) atom. In the seventh O site, O(7) is bonded to one Li(11), one Li(5), one Li(9), one Fe(1), and one Si(1) atom to form distorted OLi3FeSi trigonal bipyramids that share  a cornercorner with one O(16)Li5Fe pentagonal pyramid,  a cornercorner with one O(11)Li3Fe tetrahedra,  a cornercorner with one O(12)Li3Fe tetrahedra, corners with two equivalent O(4)Li2FeSi tetrahedra, and  an edgeedge with one O(3)Li4Fe trigonal bipyramid. In the eighth O site, O(8) is bonded in a 6-coordinate geometry to one Li(10), one Li(12), one Li(6), one Li(7), one Li(8), and one Fe(2) atom. In the ninth O site, O(9) is bonded in a 6-coordinate geometry to one Li(10), one Li(3), one Li(6), one Li(7), one Li(8), and one Fe(3) atom. In the tenth O site, O(10) is bonded in a 5-coordinate geometry to one Li(13), one Li(4), one Li(9), one Fe(4), and one Si(1) atom. In the eleventh O site, O(11) is bonded to one Li(11), one Li(15), one Li(8), and one Fe(3) atom to form OLi3Fe tetrahedra that share  a cornercorner with one O(7)Li3FeSi trigonal bipyramid and  a cornercorner with one O(2)Li4Fe trigonal bipyramid. In the twelfth O site, O(12) is bonded to one Li(12), one Li(16), one Li(9), and one Fe(4) atom to form OLi3Fe tetrahedra that share corners with two equivalent O(16)Li5Fe pentagonal pyramids,  a cornercorner with one O(7)Li3FeSi trigonal bipyramid,  a cornercorner with one O(2)Li4Fe trigonal bipyramid, and corners with two equivalent O(3)Li4Fe trigonal bipyramids. In the thirteenth O site, O(13) is bonded in a 5-coordinate geometry to one Li(1), one Li(11), one Li(13), one Fe(3), and one Si(1) atom. In the fourteenth O site, O(14) is bonded in a 6-coordinate geometry to one Li(10), one Li(12), one Li(14), one Li(2), one Li(7), and one Fe(4) atom. In the fifteenth O site, O(15) is bonded in a 6-coordinate geometry to one Li(14), one Li(15), one Li(2), one Li(3), one Li(6), and one Fe(3) atom. In the sixteenth O site, O(16) is bonded to one Li(1), one Li(13), one Li(16), one Li(4), one Li(5), and one Fe(4) atom to form distorted OLi5Fe pentagonal pyramids that share  a cornercorner with one O(4)Li2FeSi tetrahedra, corners with two equivalent O(12)Li3Fe tetrahedra,  a cornercorner with one O(7)Li3FeSi trigonal bipyramid,  a cornercorner with one O(3)Li4Fe trigonal bipyramid, and  an edgeedge with one O(3)Li4Fe trigonal bipyramid.
Li16Fe4SiO16 is Aluminum carbonitride-derived structured and crystallizes in the triclinic P1 space group. There are sixteen inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(1), one O(13), one O(16), and one O(4) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Fe(3)O4 tetrahedra,  a cornercorner with one Fe(4)O4 tetrahedra, corners with two equivalent Li(16)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and  an edgeedge with one Li(11)O4 tetrahedra. The Li(1)-O(1) bond length is 1.96 Å. The Li(1)-O(13) bond length is 2.11 Å. The Li(1)-O(16) bond length is 1.97 Å. The Li(1)-O(4) bond length is 2.18 Å. In the second Li site, Li(2) is bonded in a 4-coordinate geometry to one O(14), one O(15), one O(2), and one O(6) atom. The Li(2)-O(14) bond length is 2.07 Å. The Li(2)-O(15) bond length is 2.13 Å. The Li(2)-O(2) bond length is 1.83 Å. The Li(2)-O(6) bond length is 2.06 Å. In the third Li site, Li(3) is bonded to one O(15), one O(4), one O(5), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra,  an edgeedge with one Li(15)O4 tetrahedra, and  an edgeedge with one Li(8)O4 tetrahedra. The Li(3)-O(15) bond length is 1.94 Å. The Li(3)-O(4) bond length is 2.30 Å. The Li(3)-O(5) bond length is 1.97 Å. The Li(3)-O(9) bond length is 1.95 Å. In the fourth Li site, Li(4) is bonded in a 4-coordinate geometry to one O(10), one O(16), one O(3), and one O(6) atom. The Li(4)-O(10) bond length is 2.40 Å. The Li(4)-O(16) bond length is 2.00 Å. The Li(4)-O(3) bond length is 1.91 Å. The Li(4)-O(6) bond length is 1.92 Å. In the fifth Li site, Li(5) is bonded in a 3-coordinate geometry to one O(16), one O(3), and one O(7) atom. The Li(5)-O(16) bond length is 2.08 Å. The Li(5)-O(3) bond length is 1.86 Å. The Li(5)-O(7) bond length is 2.26 Å. In the sixth Li site, Li(6) is bonded in a 3-coordinate geometry to one O(15), one O(5), one O(8), and one O(9) atom. The Li(6)-O(15) bond length is 2.55 Å. The Li(6)-O(5) bond length is 1.94 Å. The Li(6)-O(8) bond length is 2.24 Å. The Li(6)-O(9) bond length is 2.05 Å. In the seventh Li site, Li(7) is bonded in a 3-coordinate geometry to one O(14), one O(6), one O(8), and one O(9) atom. The Li(7)-O(14) bond length is 1.96 Å. The Li(7)-O(6) bond length is 1.96 Å. The Li(7)-O(8) bond length is 1.85 Å. The Li(7)-O(9) bond length is 2.36 Å. In the eighth Li site, Li(8) is bonded to one O(11), one O(5), one O(8), and one O(9) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Li(11)O4 tetrahedra,  a cornercorner with one Li(12)O4 tetrahedra,  a cornercorner with one Fe(1)O4 tetrahedra,  a cornercorner with one Fe(2)O4 tetrahedra, corners with two equivalent Li(15)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra, and  an edgeedge with one Li(3)O4 tetrahedra. The Li(8)-O(11) bond length is 1.87 Å. The Li(8)-O(5) bond length is 1.97 Å. The Li(8)-O(8) bond length is 2.02 Å. The Li(8)-O(9) bond length is 2.15 Å. In the ninth Li site, Li(9) is bonded to one O(10), one O(12), one O(3), and one O(7) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(11)O4 tetrahedra,  a cornercorner with one Li(12)O4 tetrahedra,  a cornercorner with one Fe(1)O4 tetrahedra,  a cornercorner with one Fe(2)O4 tetrahedra, corners with two equivalent Li(16)O4 tetrahedra, corners with two equivalent Fe(4)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. The Li(9)-O(10) bond length is 2.09 Å. The Li(9)-O(12) bond length is 1.88 Å. The Li(9)-O(3) bond length is 1.89 Å. The Li(9)-O(7) bond length is 2.21 Å. In the tenth Li site, Li(10) is bonded in a 4-coordinate geometry to one O(14), one O(6), one O(8), and one O(9) atom. The Li(10)-O(14) bond length is 2.00 Å. The Li(10)-O(6) bond length is 2.24 Å. The Li(10)-O(8) bond length is 1.87 Å. The Li(10)-O(9) bond length is 1.91 Å. In the eleventh Li site, Li(11) is bonded to one O(1), one O(11), one O(13), and one O(7) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Li(15)O4 tetrahedra,  a cornercorner with one Li(16)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra,  an edgeedge with one Li(1)O4 tetrahedra, and  an edgeedge with one Si(1)O4 tetrahedra. The Li(11)-O(1) bond length is 1.98 Å. The Li(11)-O(11) bond length is 1.82 Å. The Li(11)-O(13) bond length is 2.06 Å. The Li(11)-O(7) bond length is 2.25 Å. In the twelfth Li site, Li(12) is bonded to one O(12), one O(14), one O(2), and one O(8) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Li(15)O4 tetrahedra,  a cornercorner with one Li(16)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra, and corners with two equivalent Fe(4)O4 tetrahedra. The Li(12)-O(12) bond length is 1.92 Å. The Li(12)-O(14) bond length is 2.25 Å. The Li(12)-O(2) bond length is 1.98 Å. The Li(12)-O(8) bond length is 2.04 Å. In the thirteenth Li site, Li(13) is bonded in a 4-coordinate geometry to one O(1), one O(10), one O(13), and one O(16) atom. The Li(13)-O(1) bond length is 1.94 Å. The Li(13)-O(10) bond length is 2.48 Å. The Li(13)-O(13) bond length is 2.00 Å. The Li(13)-O(16) bond length is 2.03 Å. In the fourteenth Li site, Li(14) is bonded in a 3-coordinate geometry to one O(14), one O(15), one O(2), and one O(6) atom. The Li(14)-O(14) bond length is 1.98 Å. The Li(14)-O(15) bond length is 1.92 Å. The Li(14)-O(2) bond length is 1.83 Å. The Li(14)-O(6) bond length is 2.35 Å. In the fifteenth Li site, Li(15) is bonded to one O(11), one O(15), one O(2), and one O(5) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Li(11)O4 tetrahedra,  a cornercorner with one Li(12)O4 tetrahedra,  a cornercorner with one Fe(1)O4 tetrahedra,  a cornercorner with one Fe(2)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra, and  an edgeedge with one Li(3)O4 tetrahedra. The Li(15)-O(11) bond length is 1.90 Å. The Li(15)-O(15) bond length is 2.28 Å. The Li(15)-O(2) bond length is 1.98 Å. The Li(15)-O(5) bond length is 1.96 Å. In the sixteenth Li site, Li(16) is bonded to one O(1), one O(12), one O(16), and one O(3) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Li(11)O4 tetrahedra,  a cornercorner with one Li(12)O4 tetrahedra,  a cornercorner with one Fe(1)O4 tetrahedra,  a cornercorner with one Fe(2)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(9)O4 tetrahedra, and corners with two equivalent Fe(4)O4 tetrahedra. The Li(16)-O(1) bond length is 2.07 Å. The Li(16)-O(12) bond length is 1.88 Å. The Li(16)-O(16) bond length is 2.15 Å. The Li(16)-O(3) bond length is 1.88 Å. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(4), one O(5), and one O(7) atom to form FeO4 tetrahedra that share  a cornercorner with one Li(15)O4 tetrahedra,  a cornercorner with one Li(16)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(11)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. The Fe(1)-O(1) bond length is 1.88 Å. The Fe(1)-O(4) bond length is 2.01 Å. The Fe(1)-O(5) bond length is 1.83 Å. The Fe(1)-O(7) bond length is 2.03 Å. In the second Fe site, Fe(2) is bonded to one O(2), one O(3), one O(6), and one O(8) atom to form FeO4 tetrahedra that share  a cornercorner with one Li(15)O4 tetrahedra,  a cornercorner with one Li(16)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra, and corners with two equivalent Li(12)O4 tetrahedra. The Fe(2)-O(2) bond length is 1.90 Å. The Fe(2)-O(3) bond length is 1.89 Å. The Fe(2)-O(6) bond length is 1.92 Å. The Fe(2)-O(8) bond length is 1.92 Å. In the third Fe site, Fe(3) is bonded to one O(11), one O(13), one O(15), and one O(9) atom to form FeO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Li(11)O4 tetrahedra, corners with two equivalent Li(15)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, and corners with two equivalent Li(8)O4 tetrahedra. The Fe(3)-O(11) bond length is 1.85 Å. The Fe(3)-O(13) bond length is 2.15 Å. The Fe(3)-O(15) bond length is 1.89 Å. The Fe(3)-O(9) bond length is 1.89 Å. In the fourth Fe site, Fe(4) is bonded to one O(10), one O(12), one O(14), and one O(16) atom to form FeO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Li(12)O4 tetrahedra, corners with two equivalent Li(16)O4 tetrahedra, and corners with two equivalent Li(9)O4 tetrahedra. The Fe(4)-O(10) bond length is 2.11 Å. The Fe(4)-O(12) bond length is 1.85 Å. The Fe(4)-O(14) bond length is 1.90 Å. The Fe(4)-O(16) bond length is 1.93 Å. Si(1) is bonded to one O(10), one O(13), one O(4), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Fe(3)O4 tetrahedra,  a cornercorner with one Fe(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(9)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, and  an edgeedge with one Li(11)O4 tetrahedra. The Si(1)-O(10) bond length is 1.66 Å. The Si(1)-O(13) bond length is 1.66 Å. The Si(1)-O(4) bond length is 1.66 Å. The Si(1)-O(7) bond length is 1.67 Å. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Li(1), one Li(11), one Li(13), one Li(16), and one Fe(1) atom. In the second O site, O(2) is bonded to one Li(12), one Li(14), one Li(15), one Li(2), and one Fe(2) atom to form distorted OLi4Fe trigonal bipyramids that share  a cornercorner with one O(11)Li3Fe tetrahedra,  a cornercorner with one O(12)Li3Fe tetrahedra, and  a cornercorner with one O(3)Li4Fe trigonal bipyramid. In the third O site, O(3) is bonded to one Li(16), one Li(4), one Li(5), one Li(9), and one Fe(2) atom to form distorted OLi4Fe trigonal bipyramids that share  a cornercorner with one O(16)Li5Fe pentagonal pyramid, corners with two equivalent O(12)Li3Fe tetrahedra,  a cornercorner with one O(2)Li4Fe trigonal bipyramid,  an edgeedge with one O(16)Li5Fe pentagonal pyramid, and  an edgeedge with one O(7)Li3FeSi trigonal bipyramid. In the fourth O site, O(4) is bonded to one Li(1), one Li(3), one Fe(1), and one Si(1) atom to form distorted OLi2FeSi tetrahedra that share  a cornercorner with one O(16)Li5Fe pentagonal pyramid and corners with two equivalent O(7)Li3FeSi trigonal bipyramids. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one Li(15), one Li(3), one Li(6), one Li(8), and one Fe(1) atom. In the sixth O site, O(6) is bonded in a 6-coordinate geometry to one Li(10), one Li(14), one Li(2), one Li(4), one Li(7), and one Fe(2) atom. In the seventh O site, O(7) is bonded to one Li(11), one Li(5), one Li(9), one Fe(1), and one Si(1) atom to form distorted OLi3FeSi trigonal bipyramids that share  a cornercorner with one O(16)Li5Fe pentagonal pyramid,  a cornercorner with one O(11)Li3Fe tetrahedra,  a cornercorner with one O(12)Li3Fe tetrahedra, corners with two equivalent O(4)Li2FeSi tetrahedra, and  an edgeedge with one O(3)Li4Fe trigonal bipyramid. In the eighth O site, O(8) is bonded in a 6-coordinate geometry to one Li(10), one Li(12), one Li(6), one Li(7), one Li(8), and one Fe(2) atom. In the ninth O site, O(9) is bonded in a 6-coordinate geometry to one Li(10), one Li(3), one Li(6), one Li(7), one Li(8), and one Fe(3) atom. In the tenth O site, O(10) is bonded in a 5-coordinate geometry to one Li(13), one Li(4), one Li(9), one Fe(4), and one Si(1) atom. In the eleventh O site, O(11) is bonded to one Li(11), one Li(15), one Li(8), and one Fe(3) atom to form OLi3Fe tetrahedra that share  a cornercorner with one O(7)Li3FeSi trigonal bipyramid and  a cornercorner with one O(2)Li4Fe trigonal bipyramid. In the twelfth O site, O(12) is bonded to one Li(12), one Li(16), one Li(9), and one Fe(4) atom to form OLi3Fe tetrahedra that share corners with two equivalent O(16)Li5Fe pentagonal pyramids,  a cornercorner with one O(7)Li3FeSi trigonal bipyramid,  a cornercorner with one O(2)Li4Fe trigonal bipyramid, and corners with two equivalent O(3)Li4Fe trigonal bipyramids. In the thirteenth O site, O(13) is bonded in a 5-coordinate geometry to one Li(1), one Li(11), one Li(13), one Fe(3), and one Si(1) atom. In the fourteenth O site, O(14) is bonded in a 6-coordinate geometry to one Li(10), one Li(12), one Li(14), one Li(2), one Li(7), and one Fe(4) atom. In the fifteenth O site, O(15) is bonded in a 6-coordinate geometry to one Li(14), one Li(15), one Li(2), one Li(3), one Li(6), and one Fe(3) atom. In the sixteenth O site, O(16) is bonded to one Li(1), one Li(13), one Li(16), one Li(4), one Li(5), and one Fe(4) atom to form distorted OLi5Fe pentagonal pyramids that share  a cornercorner with one O(4)Li2FeSi tetrahedra, corners with two equivalent O(12)Li3Fe tetrahedra,  a cornercorner with one O(7)Li3FeSi trigonal bipyramid,  a cornercorner with one O(3)Li4Fe trigonal bipyramid, and  an edgeedge with one O(3)Li4Fe trigonal bipyramid.