K2Mg(CoO2)2 crystallizes in the monoclinic C2/m space group. K(1) is bonded in a 3-coordinate geometry to three equivalent O(1) atoms. Mg(1) is bonded in a square co-planar geometry to four equivalent O(2) atoms. Co(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form a mixture of distorted corner and edge-sharing CoO4 tetrahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded to three equivalent K(1) and two equivalent Co(1) atoms to form a mixture of distorted corner and edge-sharing OK3Co2 trigonal bipyramids. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Mg(1) and two equivalent Co(1) atoms.
K2Mg(CoO2)2 crystallizes in the monoclinic C2/m space group. K(1) is bonded in a 3-coordinate geometry to three equivalent O(1) atoms. There are two shorter (2.61 Å) and one longer (2.77 Å) K(1)-O(1) bond length. Mg(1) is bonded in a square co-planar geometry to four equivalent O(2) atoms. All Mg(1)-O(2) bond lengths are 2.08 Å. Co(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form a mixture of distorted corner and edge-sharing CoO4 tetrahedra. There is one shorter (1.91 Å) and one longer (1.92 Å) Co(1)-O(1) bond length. Both Co(1)-O(2) bond lengths are 2.15 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded to three equivalent K(1) and two equivalent Co(1) atoms to form a mixture of distorted corner and edge-sharing OK3Co2 trigonal bipyramids. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Mg(1) and two equivalent Co(1) atoms.