Na2NiO2 is Ilmenite-like structured and crystallizes in the orthorhombic Immm space group. Na(1) is bonded to four equivalent O(1) atoms to form a mixture of distorted corner and edge-sharing NaO4 trigonal pyramids. Ni(1) is bonded in a square co-planar geometry to four equivalent O(1) atoms. O(1) is bonded to four equivalent Na(1) and two equivalent Ni(1) atoms to form a mixture of corner and edge-sharing ONa4Ni2 octahedra. The corner-sharing octahedral tilt angles range from 0-23°.
Na2NiO2 is Ilmenite-like structured and crystallizes in the orthorhombic Immm space group. Na(1) is bonded to four equivalent O(1) atoms to form a mixture of distorted corner and edge-sharing NaO4 trigonal pyramids. There are two shorter (2.32 Å) and two longer (2.33 Å) Na(1)-O(1) bond lengths. Ni(1) is bonded in a square co-planar geometry to four equivalent O(1) atoms. All Ni(1)-O(1) bond lengths are 1.91 Å. O(1) is bonded to four equivalent Na(1) and two equivalent Ni(1) atoms to form a mixture of corner and edge-sharing ONa4Ni2 octahedra. The corner-sharing octahedral tilt angles range from 0-23°.