Rb2Na3InO4 crystallizes in the orthorhombic Pnnm space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 6-coordinate geometry to one O(1), one O(3), and four equivalent O(2) atoms. In the second Rb site, Rb(2) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(1), one O(3), and two equivalent O(2) atoms to form distorted NaO4 tetrahedra that share corners with two equivalent Na(1)O4 tetrahedra, corners with two equivalent In(1)O4 tetrahedra, corners with two equivalent Na(2)O4 trigonal pyramids,  an edgeedge with one Na(1)O4 tetrahedra,  an edgeedge with one In(1)O4 tetrahedra, and  an edgeedge with one Na(2)O4 trigonal pyramid. In the second Na site, Na(2) is bonded to one O(1), one O(3), and two equivalent O(2) atoms to form distorted NaO4 trigonal pyramids that share corners with two equivalent In(1)O4 tetrahedra, corners with four equivalent Na(1)O4 tetrahedra,  an edgeedge with one In(1)O4 tetrahedra, and edges with two equivalent Na(1)O4 tetrahedra. In(1) is bonded to one O(1), one O(3), and two equivalent O(2) atoms to form InO4 tetrahedra that share corners with four equivalent Na(1)O4 tetrahedra, corners with two equivalent Na(2)O4 trigonal pyramids, edges with two equivalent Na(1)O4 tetrahedra, and  an edgeedge with one Na(2)O4 trigonal pyramid. There are three inequivalent O sites. In the first O site, O(3) is bonded in a 7-coordinate geometry to one Rb(1), two equivalent Rb(2), one Na(2), two equivalent Na(1), and one In(1) atom. In the second O site, O(1) is bonded in a 7-coordinate geometry to one Rb(1), two equivalent Rb(2), one Na(2), two equivalent Na(1), and one In(1) atom. In the third O site, O(2) is bonded in a 7-coordinate geometry to one Rb(2), two equivalent Rb(1), one Na(2), two equivalent Na(1), and one In(1) atom.
Rb2Na3InO4 crystallizes in the orthorhombic Pnnm space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 6-coordinate geometry to one O(1), one O(3), and four equivalent O(2) atoms. The Rb(1)-O(1) bond length is 3.08 Å. The Rb(1)-O(3) bond length is 3.27 Å. There are two shorter (3.14 Å) and two longer (3.21 Å) Rb(1)-O(2) bond lengths. In the second Rb site, Rb(2) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Both Rb(2)-O(1) bond lengths are 3.06 Å. Both Rb(2)-O(2) bond lengths are 3.01 Å. Both Rb(2)-O(3) bond lengths are 2.97 Å. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(1), one O(3), and two equivalent O(2) atoms to form distorted NaO4 tetrahedra that share corners with two equivalent Na(1)O4 tetrahedra, corners with two equivalent In(1)O4 tetrahedra, corners with two equivalent Na(2)O4 trigonal pyramids,  an edgeedge with one Na(1)O4 tetrahedra,  an edgeedge with one In(1)O4 tetrahedra, and  an edgeedge with one Na(2)O4 trigonal pyramid. The Na(1)-O(1) bond length is 2.38 Å. The Na(1)-O(3) bond length is 2.40 Å. There is one shorter (2.37 Å) and one longer (2.43 Å) Na(1)-O(2) bond length. In the second Na site, Na(2) is bonded to one O(1), one O(3), and two equivalent O(2) atoms to form distorted NaO4 trigonal pyramids that share corners with two equivalent In(1)O4 tetrahedra, corners with four equivalent Na(1)O4 tetrahedra,  an edgeedge with one In(1)O4 tetrahedra, and edges with two equivalent Na(1)O4 tetrahedra. The Na(2)-O(1) bond length is 2.43 Å. The Na(2)-O(3) bond length is 2.43 Å. Both Na(2)-O(2) bond lengths are 2.27 Å. In(1) is bonded to one O(1), one O(3), and two equivalent O(2) atoms to form InO4 tetrahedra that share corners with four equivalent Na(1)O4 tetrahedra, corners with two equivalent Na(2)O4 trigonal pyramids, edges with two equivalent Na(1)O4 tetrahedra, and  an edgeedge with one Na(2)O4 trigonal pyramid. The In(1)-O(1) bond length is 2.13 Å. The In(1)-O(3) bond length is 2.14 Å. Both In(1)-O(2) bond lengths are 2.10 Å. There are three inequivalent O sites. In the first O site, O(3) is bonded in a 7-coordinate geometry to one Rb(1), two equivalent Rb(2), one Na(2), two equivalent Na(1), and one In(1) atom. In the second O site, O(1) is bonded in a 7-coordinate geometry to one Rb(1), two equivalent Rb(2), one Na(2), two equivalent Na(1), and one In(1) atom. In the third O site, O(2) is bonded in a 7-coordinate geometry to one Rb(2), two equivalent Rb(1), one Na(2), two equivalent Na(1), and one In(1) atom.