K3Na2InO4 crystallizes in the monoclinic P2_1/c 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), two equivalent O(3), and two equivalent O(4) atoms. In the second K site, K(2) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(4), and two equivalent O(2) atoms. In the third K site, K(3) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(4), and two equivalent O(1) atoms. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form distorted NaO4 tetrahedra that share corners with two equivalent In(1)O4 tetrahedra and  an edgeedge with one In(1)O4 tetrahedra. In the second Na site, Na(2) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(3), and one O(4) atom. In(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form InO4 tetrahedra that share corners with two equivalent Na(1)O4 tetrahedra and  an edgeedge with one Na(1)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one K(2), two equivalent K(3), one Na(1), one Na(2), and one In(1) atom. In the second O site, O(2) is bonded in a 7-coordinate geometry to one K(1), one K(3), two equivalent K(2), one Na(1), one Na(2), and one In(1) atom. In the third O site, O(3) is bonded in a 7-coordinate geometry to one K(2), one K(3), two equivalent K(1), one Na(1), one Na(2), and one In(1) atom. In the fourth O site, O(4) is bonded in a 7-coordinate geometry to one K(2), one K(3), two equivalent K(1), one Na(1), one Na(2), and one In(1) atom.
K3Na2InO4 crystallizes in the monoclinic P2_1/c 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), two equivalent O(3), and two equivalent O(4) atoms. The K(1)-O(2) bond length is 2.95 Å. There is one shorter (2.79 Å) and one longer (2.88 Å) K(1)-O(3) bond length. There is one shorter (2.93 Å) and one longer (3.03 Å) K(1)-O(4) bond length. In the second K site, K(2) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(4), and two equivalent O(2) atoms. The K(2)-O(1) bond length is 2.91 Å. The K(2)-O(3) bond length is 2.64 Å. The K(2)-O(4) bond length is 2.79 Å. There is one shorter (2.80 Å) and one longer (3.17 Å) K(2)-O(2) bond length. In the third K site, K(3) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(4), and two equivalent O(1) atoms. The K(3)-O(2) bond length is 2.79 Å. The K(3)-O(3) bond length is 2.96 Å. The K(3)-O(4) bond length is 2.68 Å. There is one shorter (2.79 Å) and one longer (3.18 Å) K(3)-O(1) bond length. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form distorted NaO4 tetrahedra that share corners with two equivalent In(1)O4 tetrahedra and  an edgeedge with one In(1)O4 tetrahedra. The Na(1)-O(1) bond length is 2.35 Å. The Na(1)-O(2) bond length is 2.41 Å. The Na(1)-O(3) bond length is 2.51 Å. The Na(1)-O(4) bond length is 2.29 Å. In the second Na site, Na(2) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(3), and one O(4) atom. The Na(2)-O(1) bond length is 2.31 Å. The Na(2)-O(2) bond length is 2.29 Å. The Na(2)-O(3) bond length is 2.33 Å. The Na(2)-O(4) bond length is 2.61 Å. In(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form InO4 tetrahedra that share corners with two equivalent Na(1)O4 tetrahedra and  an edgeedge with one Na(1)O4 tetrahedra. The In(1)-O(1) bond length is 2.10 Å. The In(1)-O(2) bond length is 2.11 Å. The In(1)-O(3) bond length is 2.13 Å. The In(1)-O(4) bond length is 2.10 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one K(2), two equivalent K(3), one Na(1), one Na(2), and one In(1) atom. In the second O site, O(2) is bonded in a 7-coordinate geometry to one K(1), one K(3), two equivalent K(2), one Na(1), one Na(2), and one In(1) atom. In the third O site, O(3) is bonded in a 7-coordinate geometry to one K(2), one K(3), two equivalent K(1), one Na(1), one Na(2), and one In(1) atom. In the fourth O site, O(4) is bonded in a 7-coordinate geometry to one K(2), one K(3), two equivalent K(1), one Na(1), one Na(2), and one In(1) atom.