Sr3Fe2O5 crystallizes in the orthorhombic Cmmm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a body-centered cubic geometry to four equivalent O(1) and four equivalent O(2) atoms. In the second Sr site, Sr(2) is bonded in a distorted body-centered cubic geometry to two equivalent O(2) and six equivalent O(3) atoms. Fe(1) is bonded in a square co-planar geometry to one O(1), one O(3), and two equivalent O(2) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Sr(1) and two equivalent Fe(1) atoms to form a mixture of edge, corner, and face-sharing OSr4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-66°. In the second O site, O(2) is bonded to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Fe(1) atoms to form a mixture of edge, corner, and face-sharing OSr4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-66°. In the third O site, O(3) is bonded in a 7-coordinate geometry to six equivalent Sr(2) and one Fe(1) atom.
Sr3Fe2O5 crystallizes in the orthorhombic Cmmm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a body-centered cubic geometry to four equivalent O(1) and four equivalent O(2) atoms. All Sr(1)-O(1) bond lengths are 2.65 Å. All Sr(1)-O(2) bond lengths are 2.65 Å. In the second Sr site, Sr(2) is bonded in a distorted body-centered cubic geometry to two equivalent O(2) and six equivalent O(3) atoms. Both Sr(2)-O(2) bond lengths are 2.58 Å. There are four shorter (2.65 Å) and two longer (3.08 Å) Sr(2)-O(3) bond lengths. Fe(1) is bonded in a square co-planar geometry to one O(1), one O(3), and two equivalent O(2) atoms. The Fe(1)-O(1) bond length is 2.05 Å. The Fe(1)-O(3) bond length is 2.02 Å. Both Fe(1)-O(2) bond lengths are 2.04 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Sr(1) and two equivalent Fe(1) atoms to form a mixture of edge, corner, and face-sharing OSr4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-66°. In the second O site, O(2) is bonded to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Fe(1) atoms to form a mixture of edge, corner, and face-sharing OSr4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-66°. In the third O site, O(3) is bonded in a 7-coordinate geometry to six equivalent Sr(2) and one Fe(1) atom.