LiSr2FeO3F is Pb (Zr_0.50 Ti_0.48) O_3-derived structured and crystallizes in the triclinic P1 space group. Li(1) is bonded in a 4-coordinate geometry to one O(2), two equivalent O(1), and one F(1) atom. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to one O(1), one O(3), two equivalent O(2), and two equivalent F(1) atoms to form distorted edge-sharing SrO4F2 pentagonal pyramids. In the second Sr site, Sr(2) is bonded in a 5-coordinate geometry to one O(1), two equivalent O(2), two equivalent O(3), and one F(1) atom. Fe(1) is bonded in a 3-coordinate geometry to one O(1), one O(2), and one O(3) atom. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Li(1), one Sr(1), one Sr(2), and one Fe(1) atom to form distorted OSr2Li2Fe trigonal bipyramids that share corners with two equivalent O(1)Sr2Li2Fe trigonal bipyramids, corners with two equivalent O(3)Sr3Fe trigonal pyramids, and  an edgeedge with one O(3)Sr3Fe trigonal pyramid. In the second O site, O(2) is bonded in a 6-coordinate geometry to one Li(1), two equivalent Sr(1), two equivalent Sr(2), and one Fe(1) atom. In the third O site, O(3) is bonded to one Sr(1), two equivalent Sr(2), and one Fe(1) atom to form distorted OSr3Fe trigonal pyramids that share corners with two equivalent O(1)Sr2Li2Fe trigonal bipyramids, corners with two equivalent O(3)Sr3Fe trigonal pyramids, and  an edgeedge with one O(1)Sr2Li2Fe trigonal bipyramid. F(1) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Sr(2), and two equivalent Sr(1) atoms.
LiSr2FeO3F is Pb (Zr_0.50 Ti_0.48) O_3-derived structured and crystallizes in the triclinic P1 space group. Li(1) is bonded in a 4-coordinate geometry to one O(2), two equivalent O(1), and one F(1) atom. The Li(1)-O(2) bond length is 1.96 Å. There is one shorter (2.17 Å) and one longer (2.18 Å) Li(1)-O(1) bond length. The Li(1)-F(1) bond length is 1.91 Å. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to one O(1), one O(3), two equivalent O(2), and two equivalent F(1) atoms to form distorted edge-sharing SrO4F2 pentagonal pyramids. The Sr(1)-O(1) bond length is 2.42 Å. The Sr(1)-O(3) bond length is 2.45 Å. There is one shorter (2.62 Å) and one longer (2.63 Å) Sr(1)-O(2) bond length. There is one shorter (2.52 Å) and one longer (2.68 Å) Sr(1)-F(1) bond length. In the second Sr site, Sr(2) is bonded in a 5-coordinate geometry to one O(1), two equivalent O(2), two equivalent O(3), and one F(1) atom. The Sr(2)-O(1) bond length is 2.42 Å. There is one shorter (2.64 Å) and one longer (3.11 Å) Sr(2)-O(2) bond length. There is one shorter (2.46 Å) and one longer (2.53 Å) Sr(2)-O(3) bond length. The Sr(2)-F(1) bond length is 2.48 Å. Fe(1) is bonded in a 3-coordinate geometry to one O(1), one O(2), and one O(3) atom. The Fe(1)-O(1) bond length is 1.96 Å. The Fe(1)-O(2) bond length is 1.94 Å. The Fe(1)-O(3) bond length is 1.90 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Li(1), one Sr(1), one Sr(2), and one Fe(1) atom to form distorted OSr2Li2Fe trigonal bipyramids that share corners with two equivalent O(1)Sr2Li2Fe trigonal bipyramids, corners with two equivalent O(3)Sr3Fe trigonal pyramids, and  an edgeedge with one O(3)Sr3Fe trigonal pyramid. In the second O site, O(2) is bonded in a 6-coordinate geometry to one Li(1), two equivalent Sr(1), two equivalent Sr(2), and one Fe(1) atom. In the third O site, O(3) is bonded to one Sr(1), two equivalent Sr(2), and one Fe(1) atom to form distorted OSr3Fe trigonal pyramids that share corners with two equivalent O(1)Sr2Li2Fe trigonal bipyramids, corners with two equivalent O(3)Sr3Fe trigonal pyramids, and  an edgeedge with one O(1)Sr2Li2Fe trigonal bipyramid. F(1) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Sr(2), and two equivalent Sr(1) atoms.