RbIn(PO4)2 crystallizes in the monoclinic P2_1/c space group. Rb(1) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(4), one O(6), one O(7), two equivalent O(5), and two equivalent O(8) atoms. In(1) is bonded to one O(1), one O(2), one O(3), one O(5), one O(6), and one O(7) atom to form InO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra and corners with three equivalent P(2)O4 tetrahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share corners with three equivalent In(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 39-49°. In the second P site, P(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form PO4 tetrahedra that share corners with three equivalent In(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 38-44°. There are eight inequivalent O sites. In the first O site, O(5) is bonded in a 2-coordinate geometry to two equivalent Rb(1), one In(1), and one P(2) atom. In the second O site, O(6) is bonded in a 3-coordinate geometry to one Rb(1), one In(1), and one P(2) atom. In the third O site, O(7) is bonded in a 2-coordinate geometry to one Rb(1), one In(1), and one P(2) atom. In the fourth O site, O(8) is bonded in a distorted single-bond geometry to two equivalent Rb(1) and one P(2) atom. In the fifth O site, O(1) is bonded in a 3-coordinate geometry to one Rb(1), one In(1), and one P(1) atom. In the sixth O site, O(2) is bonded in a 2-coordinate geometry to one Rb(1), one In(1), and one P(1) atom. In the seventh O site, O(3) is bonded in a distorted bent 150 degrees geometry to one In(1) and one P(1) atom. In the eighth O site, O(4) is bonded in a single-bond geometry to one Rb(1) and one P(1) atom.
RbIn(PO4)2 crystallizes in the monoclinic P2_1/c space group. Rb(1) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(4), one O(6), one O(7), two equivalent O(5), and two equivalent O(8) atoms. The Rb(1)-O(1) bond length is 3.02 Å. The Rb(1)-O(2) bond length is 3.03 Å. The Rb(1)-O(4) bond length is 2.98 Å. The Rb(1)-O(6) bond length is 3.00 Å. The Rb(1)-O(7) bond length is 3.21 Å. There is one shorter (3.20 Å) and one longer (3.27 Å) Rb(1)-O(5) bond length. There is one shorter (2.96 Å) and one longer (3.09 Å) Rb(1)-O(8) bond length. In(1) is bonded to one O(1), one O(2), one O(3), one O(5), one O(6), and one O(7) atom to form InO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra and corners with three equivalent P(2)O4 tetrahedra. The In(1)-O(1) bond length is 2.16 Å. The In(1)-O(2) bond length is 2.17 Å. The In(1)-O(3) bond length is 2.19 Å. The In(1)-O(5) bond length is 2.16 Å. The In(1)-O(6) bond length is 2.22 Å. The In(1)-O(7) bond length is 2.16 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share corners with three equivalent In(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 39-49°. The P(1)-O(1) bond length is 1.54 Å. The P(1)-O(2) bond length is 1.54 Å. The P(1)-O(3) bond length is 1.56 Å. The P(1)-O(4) bond length is 1.56 Å. In the second P site, P(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form PO4 tetrahedra that share corners with three equivalent In(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 38-44°. The P(2)-O(5) bond length is 1.54 Å. The P(2)-O(6) bond length is 1.56 Å. The P(2)-O(7) bond length is 1.53 Å. The P(2)-O(8) bond length is 1.56 Å. There are eight inequivalent O sites. In the first O site, O(5) is bonded in a 2-coordinate geometry to two equivalent Rb(1), one In(1), and one P(2) atom. In the second O site, O(6) is bonded in a 3-coordinate geometry to one Rb(1), one In(1), and one P(2) atom. In the third O site, O(7) is bonded in a 2-coordinate geometry to one Rb(1), one In(1), and one P(2) atom. In the fourth O site, O(8) is bonded in a distorted single-bond geometry to two equivalent Rb(1) and one P(2) atom. In the fifth O site, O(1) is bonded in a 3-coordinate geometry to one Rb(1), one In(1), and one P(1) atom. In the sixth O site, O(2) is bonded in a 2-coordinate geometry to one Rb(1), one In(1), and one P(1) atom. In the seventh O site, O(3) is bonded in a distorted bent 150 degrees geometry to one In(1) and one P(1) atom. In the eighth O site, O(4) is bonded in a single-bond geometry to one Rb(1) and one P(1) atom.