K2Mg2O3 crystallizes in the tetragonal P4_32_12 space group. K(1) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(2) atoms. Mg(1) is bonded to one O(2) and three equivalent O(1) atoms to form a mixture of edge and corner-sharing MgO4 tetrahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to two equivalent K(1) and three equivalent Mg(1) atoms. In the second O site, O(2) is bonded in a 6-coordinate geometry to four equivalent K(1) and two equivalent Mg(1) atoms.
K2Mg2O3 crystallizes in the tetragonal P4_32_12 space group. K(1) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(2) atoms. There is one shorter (2.66 Å) and one longer (2.74 Å) K(1)-O(1) bond length. There is one shorter (2.62 Å) and one longer (2.75 Å) K(1)-O(2) bond length. Mg(1) is bonded to one O(2) and three equivalent O(1) atoms to form a mixture of edge and corner-sharing MgO4 tetrahedra. The Mg(1)-O(2) bond length is 1.97 Å. There are a spread of Mg(1)-O(1) bond distances ranging from 2.03-2.12 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to two equivalent K(1) and three equivalent Mg(1) atoms. In the second O site, O(2) is bonded in a 6-coordinate geometry to four equivalent K(1) and two equivalent Mg(1) atoms.