SrYCoO4 is (La,Ba)CuO4-derived structured and crystallizes in the tetragonal I4mm space group. Sr(1) is bonded in a 9-coordinate geometry to one O(1), four equivalent O(2), and four equivalent O(3) atoms. Y(1) is bonded in a 9-coordinate geometry to one O(2), four equivalent O(1), and four equivalent O(3) atoms. Co(1) is bonded to one O(1), one O(2), and four equivalent O(3) atoms to form corner-sharing CoO6 octahedra. The corner-sharing octahedral tilt angles are 10°. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), four equivalent Y(1), and one Co(1) atom to form distorted OSrY4Co octahedra that share  a cornercorner with one O(2)Sr4YCo octahedra, corners with four equivalent O(1)SrY4Co octahedra, corners with twelve equivalent O(3)Sr2Y2Co2 octahedra, edges with four equivalent O(2)Sr4YCo octahedra, edges with four equivalent O(1)SrY4Co octahedra, and faces with four equivalent O(3)Sr2Y2Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-52°. In the second O site, O(2) is bonded to four equivalent Sr(1), one Y(1), and one Co(1) atom to form distorted OSr4YCo octahedra that share  a cornercorner with one O(1)SrY4Co octahedra, corners with four equivalent O(2)Sr4YCo octahedra, corners with twelve equivalent O(3)Sr2Y2Co2 octahedra, edges with four equivalent O(2)Sr4YCo octahedra, edges with four equivalent O(1)SrY4Co octahedra, and faces with four equivalent O(3)Sr2Y2Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-53°. In the third O site, O(3) is bonded to two equivalent Sr(1), two equivalent Y(1), and two equivalent Co(1) atoms to form distorted OSr2Y2Co2 octahedra that share corners with two equivalent O(3)Sr2Y2Co2 octahedra, corners with six equivalent O(2)Sr4YCo octahedra, corners with six equivalent O(1)SrY4Co octahedra, edges with two equivalent O(3)Sr2Y2Co2 octahedra, faces with two equivalent O(2)Sr4YCo octahedra, faces with two equivalent O(1)SrY4Co octahedra, and faces with four equivalent O(3)Sr2Y2Co2 octahedra. The corner-sharing octahedral tilt angles range from 10-53°.
SrYCoO4 is (La,Ba)CuO4-derived structured and crystallizes in the tetragonal I4mm space group. Sr(1) is bonded in a 9-coordinate geometry to one O(1), four equivalent O(2), and four equivalent O(3) atoms. The Sr(1)-O(1) bond length is 2.37 Å. All Sr(1)-O(2) bond lengths are 2.71 Å. All Sr(1)-O(3) bond lengths are 2.70 Å. Y(1) is bonded in a 9-coordinate geometry to one O(2), four equivalent O(1), and four equivalent O(3) atoms. The Y(1)-O(2) bond length is 2.23 Å. All Y(1)-O(1) bond lengths are 2.69 Å. All Y(1)-O(3) bond lengths are 2.45 Å. Co(1) is bonded to one O(1), one O(2), and four equivalent O(3) atoms to form corner-sharing CoO6 octahedra. The corner-sharing octahedral tilt angles are 10°. The Co(1)-O(1) bond length is 2.01 Å. The Co(1)-O(2) bond length is 2.20 Å. All Co(1)-O(3) bond lengths are 1.90 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), four equivalent Y(1), and one Co(1) atom to form distorted OSrY4Co octahedra that share  a cornercorner with one O(2)Sr4YCo octahedra, corners with four equivalent O(1)SrY4Co octahedra, corners with twelve equivalent O(3)Sr2Y2Co2 octahedra, edges with four equivalent O(2)Sr4YCo octahedra, edges with four equivalent O(1)SrY4Co octahedra, and faces with four equivalent O(3)Sr2Y2Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-52°. In the second O site, O(2) is bonded to four equivalent Sr(1), one Y(1), and one Co(1) atom to form distorted OSr4YCo octahedra that share  a cornercorner with one O(1)SrY4Co octahedra, corners with four equivalent O(2)Sr4YCo octahedra, corners with twelve equivalent O(3)Sr2Y2Co2 octahedra, edges with four equivalent O(2)Sr4YCo octahedra, edges with four equivalent O(1)SrY4Co octahedra, and faces with four equivalent O(3)Sr2Y2Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-53°. In the third O site, O(3) is bonded to two equivalent Sr(1), two equivalent Y(1), and two equivalent Co(1) atoms to form distorted OSr2Y2Co2 octahedra that share corners with two equivalent O(3)Sr2Y2Co2 octahedra, corners with six equivalent O(2)Sr4YCo octahedra, corners with six equivalent O(1)SrY4Co octahedra, edges with two equivalent O(3)Sr2Y2Co2 octahedra, faces with two equivalent O(2)Sr4YCo octahedra, faces with two equivalent O(1)SrY4Co octahedra, and faces with four equivalent O(3)Sr2Y2Co2 octahedra. The corner-sharing octahedral tilt angles range from 10-53°.