K2Mg(CoO2)2 crystallizes in the triclinic P1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(3), and one O(4) atom. In the second K site, K(2) is bonded in a 3-coordinate geometry to one O(1), one O(3), and one O(4) atom. Mg(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a distorted trigonal planar geometry to one O(1), one O(2), and one O(3) atom. In the second Co site, Co(2) is bonded in a distorted T-shaped geometry to one O(2), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one K(1), one K(2), one Mg(1), and one Co(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one K(1), one Mg(1), one Co(1), and one Co(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one K(1), one K(2), one Mg(1), one Co(1), and one Co(2) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one K(1), one K(2), one Mg(1), and one Co(2) atom.
K2Mg(CoO2)2 crystallizes in the triclinic P1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(3), and one O(4) atom. The K(1)-O(1) bond length is 2.74 Å. The K(1)-O(2) bond length is 2.64 Å. The K(1)-O(3) bond length is 2.91 Å. The K(1)-O(4) bond length is 2.92 Å. In the second K site, K(2) is bonded in a 3-coordinate geometry to one O(1), one O(3), and one O(4) atom. The K(2)-O(1) bond length is 2.60 Å. The K(2)-O(3) bond length is 2.85 Å. The K(2)-O(4) bond length is 2.71 Å. Mg(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. The Mg(1)-O(1) bond length is 1.94 Å. The Mg(1)-O(2) bond length is 1.99 Å. The Mg(1)-O(3) bond length is 2.09 Å. The Mg(1)-O(4) bond length is 1.94 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a distorted trigonal planar geometry to one O(1), one O(2), and one O(3) atom. The Co(1)-O(1) bond length is 1.78 Å. The Co(1)-O(2) bond length is 1.90 Å. The Co(1)-O(3) bond length is 1.92 Å. In the second Co site, Co(2) is bonded in a distorted T-shaped geometry to one O(2), one O(3), and one O(4) atom. The Co(2)-O(2) bond length is 1.98 Å. The Co(2)-O(3) bond length is 1.89 Å. The Co(2)-O(4) bond length is 1.78 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one K(1), one K(2), one Mg(1), and one Co(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one K(1), one Mg(1), one Co(1), and one Co(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one K(1), one K(2), one Mg(1), one Co(1), and one Co(2) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one K(1), one K(2), one Mg(1), and one Co(2) atom.