SrFeP(O2F)2 crystallizes in the monoclinic P2_1/c space group. Sr(1) is bonded in a 10-coordinate geometry to one O(3), one O(4), two equivalent O(1), three equivalent O(2), one F(2), and two equivalent F(1) atoms. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent F(2) atoms to form FeO4F2 octahedra that share corners with two equivalent Fe(2)O2F4 octahedra and corners with four equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 55°. In the second Fe site, Fe(2) is bonded to two equivalent O(4), two equivalent F(1), and two equivalent F(2) atoms to form FeO2F4 octahedra that share corners with two equivalent Fe(1)O4F2 octahedra and corners with two equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 55°. P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one Fe(2)O2F4 octahedra and corners with two equivalent Fe(1)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 38-58°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Fe(1), and one P(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to three equivalent Sr(1) and one P(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Sr(1), one Fe(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one Fe(2), and one P(1) atom. There are two inequivalent F sites. In the first F site, F(1) is bonded in a 3-coordinate geometry to two equivalent Sr(1) and one Fe(2) atom. In the second F site, F(2) is bonded in a trigonal planar geometry to one Sr(1), one Fe(1), and one Fe(2) atom.
SrFeP(O2F)2 crystallizes in the monoclinic P2_1/c space group. Sr(1) is bonded in a 10-coordinate geometry to one O(3), one O(4), two equivalent O(1), three equivalent O(2), one F(2), and two equivalent F(1) atoms. The Sr(1)-O(3) bond length is 2.96 Å. The Sr(1)-O(4) bond length is 2.92 Å. There is one shorter (2.63 Å) and one longer (2.83 Å) Sr(1)-O(1) bond length. There are a spread of Sr(1)-O(2) bond distances ranging from 2.73-2.96 Å. The Sr(1)-F(2) bond length is 2.55 Å. There is one shorter (2.59 Å) and one longer (2.60 Å) Sr(1)-F(1) bond length. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent F(2) atoms to form FeO4F2 octahedra that share corners with two equivalent Fe(2)O2F4 octahedra and corners with four equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 55°. Both Fe(1)-O(1) bond lengths are 2.08 Å. Both Fe(1)-O(3) bond lengths are 1.94 Å. Both Fe(1)-F(2) bond lengths are 2.03 Å. In the second Fe site, Fe(2) is bonded to two equivalent O(4), two equivalent F(1), and two equivalent F(2) atoms to form FeO2F4 octahedra that share corners with two equivalent Fe(1)O4F2 octahedra and corners with two equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 55°. Both Fe(2)-O(4) bond lengths are 1.99 Å. Both Fe(2)-F(1) bond lengths are 1.97 Å. Both Fe(2)-F(2) bond lengths are 2.00 Å. P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one Fe(2)O2F4 octahedra and corners with two equivalent Fe(1)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 38-58°. The P(1)-O(1) bond length is 1.58 Å. The P(1)-O(2) bond length is 1.53 Å. The P(1)-O(3) bond length is 1.55 Å. The P(1)-O(4) bond length is 1.56 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Fe(1), and one P(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to three equivalent Sr(1) and one P(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Sr(1), one Fe(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one Fe(2), and one P(1) atom. There are two inequivalent F sites. In the first F site, F(1) is bonded in a 3-coordinate geometry to two equivalent Sr(1) and one Fe(2) atom. In the second F site, F(2) is bonded in a trigonal planar geometry to one Sr(1), one Fe(1), and one Fe(2) atom.