K3GaO3 crystallizes in the monoclinic C2/m space group. There are three inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to one O(2) and four equivalent O(1) atoms. In the second K site, K(2) is bonded in a 4-coordinate geometry to four equivalent O(1) atoms. In the third K site, K(3) is bonded in a 6-coordinate geometry to two equivalent O(2) and four equivalent O(1) atoms. Ga(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form edge-sharing GaO4 tetrahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 7-coordinate geometry to two equivalent K(1), two equivalent K(2), two equivalent K(3), and one Ga(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one K(1), two equivalent K(3), and two equivalent Ga(1) atoms.
K3GaO3 crystallizes in the monoclinic C2/m space group. There are three inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to one O(2) and four equivalent O(1) atoms. The K(1)-O(2) bond length is 2.54 Å. There are two shorter (2.78 Å) and two longer (2.85 Å) K(1)-O(1) bond lengths. In the second K site, K(2) is bonded in a 4-coordinate geometry to four equivalent O(1) atoms. There are two shorter (2.74 Å) and two longer (2.76 Å) K(2)-O(1) bond lengths. In the third K site, K(3) is bonded in a 6-coordinate geometry to two equivalent O(2) and four equivalent O(1) atoms. Both K(3)-O(2) bond lengths are 3.05 Å. There are two shorter (2.66 Å) and two longer (2.88 Å) K(3)-O(1) bond lengths. Ga(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form edge-sharing GaO4 tetrahedra. Both Ga(1)-O(1) bond lengths are 1.84 Å. Both Ga(1)-O(2) bond lengths are 1.93 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 7-coordinate geometry to two equivalent K(1), two equivalent K(2), two equivalent K(3), and one Ga(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one K(1), two equivalent K(3), and two equivalent Ga(1) atoms.