K4MgTi2O6 crystallizes in the monoclinic Cm 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(4), and two equivalent O(3) atoms. Mg(1) is bonded in a water-like geometry to one O(1) and one O(2) atom. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(1), two equivalent O(3), and two equivalent O(4) atoms to form distorted edge-sharing TiO5 trigonal bipyramids. In the second Ti site, Ti(2) is bonded to one O(2), two equivalent O(3), and two equivalent O(4) atoms to form distorted edge-sharing TiO5 trigonal bipyramids. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to two equivalent K(1), two equivalent K(2), one Mg(1), and one Ti(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to two equivalent K(1), one Mg(1), and one Ti(2) atom. In the third O site, O(3) is bonded to one K(1), two equivalent K(2), one Ti(1), and one Ti(2) atom to form a mixture of distorted corner and edge-sharing OK3Ti2 trigonal bipyramids. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one K(1), one K(2), one Ti(1), and one Ti(2) atom.
K4MgTi2O6 crystallizes in the monoclinic Cm 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 2.70 Å. The K(1)-O(2) bond length is 3.00 Å. The K(1)-O(3) bond length is 2.81 Å. The K(1)-O(4) bond length is 2.74 Å. In the second K site, K(2) is bonded in a 3-coordinate geometry to one O(1), one O(4), and two equivalent O(3) atoms. The K(2)-O(1) bond length is 3.08 Å. The K(2)-O(4) bond length is 2.66 Å. There is one shorter (2.63 Å) and one longer (2.70 Å) K(2)-O(3) bond length. Mg(1) is bonded in a water-like geometry to one O(1) and one O(2) atom. The Mg(1)-O(1) bond length is 2.03 Å. The Mg(1)-O(2) bond length is 2.00 Å. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(1), two equivalent O(3), and two equivalent O(4) atoms to form distorted edge-sharing TiO5 trigonal bipyramids. The Ti(1)-O(1) bond length is 1.82 Å. Both Ti(1)-O(3) bond lengths are 2.01 Å. Both Ti(1)-O(4) bond lengths are 1.96 Å. In the second Ti site, Ti(2) is bonded to one O(2), two equivalent O(3), and two equivalent O(4) atoms to form distorted edge-sharing TiO5 trigonal bipyramids. The Ti(2)-O(2) bond length is 1.82 Å. Both Ti(2)-O(3) bond lengths are 1.97 Å. Both Ti(2)-O(4) bond lengths are 2.00 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to two equivalent K(1), two equivalent K(2), one Mg(1), and one Ti(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to two equivalent K(1), one Mg(1), and one Ti(2) atom. In the third O site, O(3) is bonded to one K(1), two equivalent K(2), one Ti(1), and one Ti(2) atom to form a mixture of distorted corner and edge-sharing OK3Ti2 trigonal bipyramids. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one K(1), one K(2), one Ti(1), and one Ti(2) atom.