Ca(NiO2)2 is Spinel structured and crystallizes in the tetragonal I4_1/a space group. Ca(1) is bonded to four equivalent O(1) atoms to form CaO4 tetrahedra that share corners with twelve equivalent Ni(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-69°. Ni(1) is bonded to six equivalent O(1) atoms to form distorted NiO6 octahedra that share corners with six equivalent Ca(1)O4 tetrahedra and edges with six equivalent Ni(1)O6 octahedra. O(1) is bonded to one Ca(1) and three equivalent Ni(1) atoms to form a mixture of distorted corner and edge-sharing OCaNi3 tetrahedra.
Ca(NiO2)2 is Spinel structured and crystallizes in the tetragonal I4_1/a space group. Ca(1) is bonded to four equivalent O(1) atoms to form CaO4 tetrahedra that share corners with twelve equivalent Ni(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-69°. All Ca(1)-O(1) bond lengths are 2.20 Å. Ni(1) is bonded to six equivalent O(1) atoms to form distorted NiO6 octahedra that share corners with six equivalent Ca(1)O4 tetrahedra and edges with six equivalent Ni(1)O6 octahedra. There are a spread of Ni(1)-O(1) bond distances ranging from 1.89-2.23 Å. O(1) is bonded to one Ca(1) and three equivalent Ni(1) atoms to form a mixture of distorted corner and edge-sharing OCaNi3 tetrahedra.