Sr2La2FeCoO8 is (La,Ba)CuO4-derived structured and crystallizes in the orthorhombic Amm2 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to one O(3), two equivalent O(4), two equivalent O(5), and four equivalent O(1) atoms. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to one O(5), two equivalent O(2), two equivalent O(3), and four equivalent O(1) atoms. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 9-coordinate geometry to one O(2), two equivalent O(4), two equivalent O(5), and four equivalent O(1) atoms. In the second La site, La(2) is bonded in a 9-coordinate geometry to one O(4), two equivalent O(2), two equivalent O(3), and four equivalent O(1) atoms. Fe(1) is bonded to one O(3), one O(4), and four equivalent O(1) atoms to form FeO6 octahedra that share corners with four equivalent Co(1)O6 octahedra. The corner-sharing octahedra are not tilted. Co(1) is bonded to one O(2), one O(5), and four equivalent O(1) atoms to form CoO6 octahedra that share corners with four equivalent Fe(1)O6 octahedra. The corner-sharing octahedra are not tilted. There are five inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), one Sr(2), one La(1), one La(2), one Fe(1), and one Co(1) atom to form distorted OSr2La2FeCo octahedra that share corners with two equivalent O(1)Sr2La2FeCo octahedra, corners with three equivalent O(2)Sr2La3Co octahedra, corners with three equivalent O(4)Sr2La3Fe octahedra, corners with three equivalent O(5)Sr3La2Co octahedra, corners with three equivalent O(3)Sr3La2Fe octahedra, edges with two equivalent O(1)Sr2La2FeCo octahedra,  a faceface with one O(2)Sr2La3Co octahedra,  a faceface with one O(4)Sr2La3Fe octahedra,  a faceface with one O(5)Sr3La2Co octahedra,  a faceface with one O(3)Sr3La2Fe octahedra, and faces with four equivalent O(1)Sr2La2FeCo octahedra. The corner-sharing octahedral tilt angles range from 3-55°. In the second O site, O(2) is bonded to two equivalent Sr(2), one La(1), two equivalent La(2), and one Co(1) atom to form distorted OSr2La3Co octahedra that share  a cornercorner with one O(5)Sr3La2Co octahedra, corners with four equivalent O(2)Sr2La3Co octahedra, corners with twelve equivalent O(1)Sr2La2FeCo octahedra, edges with two equivalent O(4)Sr2La3Fe octahedra, edges with two equivalent O(5)Sr3La2Co octahedra, edges with four equivalent O(3)Sr3La2Fe octahedra, and faces with four equivalent O(1)Sr2La2FeCo octahedra. The corner-sharing octahedral tilt angles range from 0-52°. In the third O site, O(3) is bonded to one Sr(1), two equivalent Sr(2), two equivalent La(2), and one Fe(1) atom to form distorted OSr3La2Fe octahedra that share  a cornercorner with one O(4)Sr2La3Fe octahedra, corners with four equivalent O(3)Sr3La2Fe octahedra, corners with twelve equivalent O(1)Sr2La2FeCo octahedra, edges with two equivalent O(4)Sr2La3Fe octahedra, edges with two equivalent O(5)Sr3La2Co octahedra, edges with four equivalent O(2)Sr2La3Co octahedra, and faces with four equivalent O(1)Sr2La2FeCo octahedra. The corner-sharing octahedral tilt angles range from 0-55°. In the fourth O site, O(4) is bonded to two equivalent Sr(1), one La(2), two equivalent La(1), and one Fe(1) atom to form distorted OSr2La3Fe octahedra that share  a cornercorner with one O(3)Sr3La2Fe octahedra, corners with four equivalent O(4)Sr2La3Fe octahedra, corners with twelve equivalent O(1)Sr2La2FeCo octahedra, edges with two equivalent O(2)Sr2La3Co octahedra, edges with two equivalent O(3)Sr3La2Fe octahedra, edges with four equivalent O(5)Sr3La2Co octahedra, and faces with four equivalent O(1)Sr2La2FeCo octahedra. The corner-sharing octahedral tilt angles range from 0-53°. In the fifth O site, O(5) is bonded to one Sr(2), two equivalent Sr(1), two equivalent La(1), and one Co(1) atom to form distorted OSr3La2Co octahedra that share  a cornercorner with one O(2)Sr2La3Co octahedra, corners with four equivalent O(5)Sr3La2Co octahedra, corners with twelve equivalent O(1)Sr2La2FeCo octahedra, edges with two equivalent O(2)Sr2La3Co octahedra, edges with two equivalent O(3)Sr3La2Fe octahedra, edges with four equivalent O(4)Sr2La3Fe octahedra, and faces with four equivalent O(1)Sr2La2FeCo octahedra. The corner-sharing octahedral tilt angles range from 0-54°.
Sr2La2FeCoO8 is (La,Ba)CuO4-derived structured and crystallizes in the orthorhombic Amm2 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to one O(3), two equivalent O(4), two equivalent O(5), and four equivalent O(1) atoms. The Sr(1)-O(3) bond length is 2.46 Å. Both Sr(1)-O(4) bond lengths are 2.78 Å. Both Sr(1)-O(5) bond lengths are 2.75 Å. All Sr(1)-O(1) bond lengths are 2.67 Å. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to one O(5), two equivalent O(2), two equivalent O(3), and four equivalent O(1) atoms. The Sr(2)-O(5) bond length is 2.43 Å. Both Sr(2)-O(2) bond lengths are 2.78 Å. Both Sr(2)-O(3) bond lengths are 2.75 Å. All Sr(2)-O(1) bond lengths are 2.68 Å. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 9-coordinate geometry to one O(2), two equivalent O(4), two equivalent O(5), and four equivalent O(1) atoms. The La(1)-O(2) bond length is 2.33 Å. Both La(1)-O(4) bond lengths are 2.77 Å. Both La(1)-O(5) bond lengths are 2.77 Å. All La(1)-O(1) bond lengths are 2.64 Å. In the second La site, La(2) is bonded in a 9-coordinate geometry to one O(4), two equivalent O(2), two equivalent O(3), and four equivalent O(1) atoms. The La(2)-O(4) bond length is 2.36 Å. Both La(2)-O(2) bond lengths are 2.78 Å. Both La(2)-O(3) bond lengths are 2.77 Å. All La(2)-O(1) bond lengths are 2.64 Å. Fe(1) is bonded to one O(3), one O(4), and four equivalent O(1) atoms to form FeO6 octahedra that share corners with four equivalent Co(1)O6 octahedra. The corner-sharing octahedra are not tilted. The Fe(1)-O(3) bond length is 2.05 Å. The Fe(1)-O(4) bond length is 2.29 Å. All Fe(1)-O(1) bond lengths are 1.95 Å. Co(1) is bonded to one O(2), one O(5), and four equivalent O(1) atoms to form CoO6 octahedra that share corners with four equivalent Fe(1)O6 octahedra. The corner-sharing octahedra are not tilted. The Co(1)-O(2) bond length is 2.31 Å. The Co(1)-O(5) bond length is 2.08 Å. All Co(1)-O(1) bond lengths are 1.93 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), one Sr(2), one La(1), one La(2), one Fe(1), and one Co(1) atom to form distorted OSr2La2FeCo octahedra that share corners with two equivalent O(1)Sr2La2FeCo octahedra, corners with three equivalent O(2)Sr2La3Co octahedra, corners with three equivalent O(4)Sr2La3Fe octahedra, corners with three equivalent O(5)Sr3La2Co octahedra, corners with three equivalent O(3)Sr3La2Fe octahedra, edges with two equivalent O(1)Sr2La2FeCo octahedra,  a faceface with one O(2)Sr2La3Co octahedra,  a faceface with one O(4)Sr2La3Fe octahedra,  a faceface with one O(5)Sr3La2Co octahedra,  a faceface with one O(3)Sr3La2Fe octahedra, and faces with four equivalent O(1)Sr2La2FeCo octahedra. The corner-sharing octahedral tilt angles range from 3-55°. In the second O site, O(2) is bonded to two equivalent Sr(2), one La(1), two equivalent La(2), and one Co(1) atom to form distorted OSr2La3Co octahedra that share  a cornercorner with one O(5)Sr3La2Co octahedra, corners with four equivalent O(2)Sr2La3Co octahedra, corners with twelve equivalent O(1)Sr2La2FeCo octahedra, edges with two equivalent O(4)Sr2La3Fe octahedra, edges with two equivalent O(5)Sr3La2Co octahedra, edges with four equivalent O(3)Sr3La2Fe octahedra, and faces with four equivalent O(1)Sr2La2FeCo octahedra. The corner-sharing octahedral tilt angles range from 0-52°. In the third O site, O(3) is bonded to one Sr(1), two equivalent Sr(2), two equivalent La(2), and one Fe(1) atom to form distorted OSr3La2Fe octahedra that share  a cornercorner with one O(4)Sr2La3Fe octahedra, corners with four equivalent O(3)Sr3La2Fe octahedra, corners with twelve equivalent O(1)Sr2La2FeCo octahedra, edges with two equivalent O(4)Sr2La3Fe octahedra, edges with two equivalent O(5)Sr3La2Co octahedra, edges with four equivalent O(2)Sr2La3Co octahedra, and faces with four equivalent O(1)Sr2La2FeCo octahedra. The corner-sharing octahedral tilt angles range from 0-55°. In the fourth O site, O(4) is bonded to two equivalent Sr(1), one La(2), two equivalent La(1), and one Fe(1) atom to form distorted OSr2La3Fe octahedra that share  a cornercorner with one O(3)Sr3La2Fe octahedra, corners with four equivalent O(4)Sr2La3Fe octahedra, corners with twelve equivalent O(1)Sr2La2FeCo octahedra, edges with two equivalent O(2)Sr2La3Co octahedra, edges with two equivalent O(3)Sr3La2Fe octahedra, edges with four equivalent O(5)Sr3La2Co octahedra, and faces with four equivalent O(1)Sr2La2FeCo octahedra. The corner-sharing octahedral tilt angles range from 0-53°. In the fifth O site, O(5) is bonded to one Sr(2), two equivalent Sr(1), two equivalent La(1), and one Co(1) atom to form distorted OSr3La2Co octahedra that share  a cornercorner with one O(2)Sr2La3Co octahedra, corners with four equivalent O(5)Sr3La2Co octahedra, corners with twelve equivalent O(1)Sr2La2FeCo octahedra, edges with two equivalent O(2)Sr2La3Co octahedra, edges with two equivalent O(3)Sr3La2Fe octahedra, edges with four equivalent O(4)Sr2La3Fe octahedra, and faces with four equivalent O(1)Sr2La2FeCo octahedra. The corner-sharing octahedral tilt angles range from 0-54°.