Mg(NiO2)2 is Spinel structured and crystallizes in the cubic Fd-3m space group. Mg(1) is bonded to four equivalent O(1) atoms to form MgO4 tetrahedra that share corners with twelve equivalent Ni(1)O6 octahedra. The corner-sharing octahedral tilt angles are 59°. Ni(1) is bonded to six equivalent O(1) atoms to form NiO6 octahedra that share corners with six equivalent Mg(1)O4 tetrahedra and edges with six equivalent Ni(1)O6 octahedra. O(1) is bonded to one Mg(1) and three equivalent Ni(1) atoms to form a mixture of distorted corner and edge-sharing OMgNi3 trigonal pyramids.
Mg(NiO2)2 is Spinel structured and crystallizes in the cubic Fd-3m space group. Mg(1) is bonded to four equivalent O(1) atoms to form MgO4 tetrahedra that share corners with twelve equivalent Ni(1)O6 octahedra. The corner-sharing octahedral tilt angles are 59°. All Mg(1)-O(1) bond lengths are 1.98 Å. Ni(1) is bonded to six equivalent O(1) atoms to form NiO6 octahedra that share corners with six equivalent Mg(1)O4 tetrahedra and edges with six equivalent Ni(1)O6 octahedra. All Ni(1)-O(1) bond lengths are 1.99 Å. O(1) is bonded to one Mg(1) and three equivalent Ni(1) atoms to form a mixture of distorted corner and edge-sharing OMgNi3 trigonal pyramids.