Y(CoO2)2 is Spinel-like structured and crystallizes in the orthorhombic Imma space group. Y(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form YO6 octahedra that share corners with six equivalent Co(1)O4 tetrahedra, edges with two equivalent Y(1)O6 octahedra, and edges with four equivalent Co(2)O6 octahedra. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form CoO4 tetrahedra that share corners with six equivalent Y(1)O6 octahedra and corners with six equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-63°. In the second Co site, Co(2) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form CoO6 octahedra that share corners with six equivalent Co(1)O4 tetrahedra, edges with two equivalent Co(2)O6 octahedra, and edges with four equivalent Y(1)O6 octahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Y(1), one Co(1), and two equivalent Co(2) atoms. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to two equivalent Y(1), one Co(1), and one Co(2) atom.
Y(CoO2)2 is Spinel-like structured and crystallizes in the orthorhombic Imma space group. Y(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form YO6 octahedra that share corners with six equivalent Co(1)O4 tetrahedra, edges with two equivalent Y(1)O6 octahedra, and edges with four equivalent Co(2)O6 octahedra. Both Y(1)-O(1) bond lengths are 2.27 Å. All Y(1)-O(2) bond lengths are 2.24 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form CoO4 tetrahedra that share corners with six equivalent Y(1)O6 octahedra and corners with six equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-63°. Both Co(1)-O(1) bond lengths are 1.94 Å. Both Co(1)-O(2) bond lengths are 1.91 Å. In the second Co site, Co(2) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form CoO6 octahedra that share corners with six equivalent Co(1)O4 tetrahedra, edges with two equivalent Co(2)O6 octahedra, and edges with four equivalent Y(1)O6 octahedra. Both Co(2)-O(2) bond lengths are 2.13 Å. All Co(2)-O(1) bond lengths are 2.20 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Y(1), one Co(1), and two equivalent Co(2) atoms. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to two equivalent Y(1), one Co(1), and one Co(2) atom.