Sr2FeWO6 crystallizes in the triclinic P-1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to one O(2), one O(3), one O(4), two equivalent O(5), and three equivalent O(1) atoms. In the second Sr site, Sr(2) is bonded in a 12-coordinate geometry to one O(1), one O(3), one O(5), three equivalent O(2), three equivalent O(4), and three equivalent O(6) atoms. W(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form WO6 octahedra that share corners with three equivalent Fe(1)O6 octahedra and corners with three equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-25°. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms to form FeO6 octahedra that share corners with six equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-22°. In the second Fe site, Fe(2) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(5) atoms to form FeO6 octahedra that share corners with six equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-25°. There are six inequivalent O sites. In the first O site, O(1) is bonded to one Sr(2), three equivalent Sr(1), one W(1), and one Fe(2) atom to form a mixture of distorted corner and edge-sharing OSr4FeW octahedra. The corner-sharing octahedral tilt angles range from 0-5°. In the second O site, O(2) is bonded to one Sr(1), three equivalent Sr(2), one W(1), and one Fe(1) atom to form a mixture of distorted corner and edge-sharing OSr4FeW octahedra. The corner-sharing octahedral tilt angles range from 0-5°. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one W(1), and one Fe(2) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Sr(1), three equivalent Sr(2), one W(1), and one Fe(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Sr(2), two equivalent Sr(1), one W(1), and one Fe(2) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to three equivalent Sr(2), one W(1), and one Fe(1) atom.
Sr2FeWO6 crystallizes in the triclinic P-1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to one O(2), one O(3), one O(4), two equivalent O(5), and three equivalent O(1) atoms. The Sr(1)-O(2) bond length is 2.82 Å. The Sr(1)-O(3) bond length is 2.60 Å. The Sr(1)-O(4) bond length is 2.63 Å. Both Sr(1)-O(5) bond lengths are 2.62 Å. There is one shorter (2.80 Å) and two longer (2.85 Å) Sr(1)-O(1) bond lengths. In the second Sr site, Sr(2) is bonded in a 12-coordinate geometry to one O(1), one O(3), one O(5), three equivalent O(2), three equivalent O(4), and three equivalent O(6) atoms. The Sr(2)-O(1) bond length is 2.89 Å. The Sr(2)-O(3) bond length is 2.60 Å. The Sr(2)-O(5) bond length is 3.21 Å. There are a spread of Sr(2)-O(2) bond distances ranging from 2.77-2.88 Å. There are a spread of Sr(2)-O(4) bond distances ranging from 2.62-3.15 Å. There are a spread of Sr(2)-O(6) bond distances ranging from 2.61-3.17 Å. W(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form WO6 octahedra that share corners with three equivalent Fe(1)O6 octahedra and corners with three equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-25°. The W(1)-O(1) bond length is 1.95 Å. The W(1)-O(2) bond length is 1.96 Å. The W(1)-O(3) bond length is 1.95 Å. The W(1)-O(4) bond length is 1.94 Å. The W(1)-O(5) bond length is 1.95 Å. The W(1)-O(6) bond length is 1.97 Å. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms to form FeO6 octahedra that share corners with six equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-22°. Both Fe(1)-O(2) bond lengths are 2.17 Å. Both Fe(1)-O(4) bond lengths are 2.18 Å. Both Fe(1)-O(6) bond lengths are 2.07 Å. In the second Fe site, Fe(2) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(5) atoms to form FeO6 octahedra that share corners with six equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-25°. Both Fe(2)-O(1) bond lengths are 2.17 Å. Both Fe(2)-O(3) bond lengths are 2.12 Å. Both Fe(2)-O(5) bond lengths are 2.13 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded to one Sr(2), three equivalent Sr(1), one W(1), and one Fe(2) atom to form a mixture of distorted corner and edge-sharing OSr4FeW octahedra. The corner-sharing octahedral tilt angles range from 0-5°. In the second O site, O(2) is bonded to one Sr(1), three equivalent Sr(2), one W(1), and one Fe(1) atom to form a mixture of distorted corner and edge-sharing OSr4FeW octahedra. The corner-sharing octahedral tilt angles range from 0-5°. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one W(1), and one Fe(2) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Sr(1), three equivalent Sr(2), one W(1), and one Fe(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Sr(2), two equivalent Sr(1), one W(1), and one Fe(2) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to three equivalent Sr(2), one W(1), and one Fe(1) atom.