RbZnP2O9 crystallizes in the triclinic P-1 space group. Rb(1) is bonded in a 9-coordinate geometry to one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), one O(9), and two equivalent O(8) atoms. Zn(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form ZnO4 tetrahedra that share corners with two equivalent P(1)O4 tetrahedra and corners with two 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(3), one O(5), and one O(6) atom to form PO4 tetrahedra that share corners with two equivalent Zn(1)O4 tetrahedra. In the second P site, P(2) is bonded to one O(2), one O(4), one O(7), and one O(8) atom to form PO4 tetrahedra that share corners with two equivalent Zn(1)O4 tetrahedra. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Zn(1) and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Rb(1), one Zn(1), and one P(2) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Rb(1), one Zn(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Rb(1), one Zn(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a single-bond geometry to one Rb(1) and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Rb(1) and one P(1) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Rb(1) and one P(2) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to two equivalent Rb(1) and one P(2) atom. In the ninth O site, O(9) is bonded in a single-bond geometry to one Rb(1) atom.
RbZnP2O9 crystallizes in the triclinic P-1 space group. Rb(1) is bonded in a 9-coordinate geometry to one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), one O(9), and two equivalent O(8) atoms. The Rb(1)-O(2) bond length is 3.39 Å. The Rb(1)-O(3) bond length is 3.17 Å. The Rb(1)-O(4) bond length is 3.01 Å. The Rb(1)-O(5) bond length is 3.22 Å. The Rb(1)-O(6) bond length is 3.39 Å. The Rb(1)-O(7) bond length is 3.15 Å. The Rb(1)-O(9) bond length is 3.37 Å. There is one shorter (2.80 Å) and one longer (3.02 Å) Rb(1)-O(8) bond length. Zn(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form ZnO4 tetrahedra that share corners with two equivalent P(1)O4 tetrahedra and corners with two equivalent P(2)O4 tetrahedra. The Zn(1)-O(1) bond length is 2.00 Å. The Zn(1)-O(2) bond length is 1.94 Å. The Zn(1)-O(3) bond length is 1.98 Å. The Zn(1)-O(4) bond length is 2.00 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(3), one O(5), and one O(6) atom to form PO4 tetrahedra that share corners with two equivalent Zn(1)O4 tetrahedra. The P(1)-O(1) bond length is 1.54 Å. The P(1)-O(3) bond length is 1.53 Å. The P(1)-O(5) bond length is 1.53 Å. The P(1)-O(6) bond length is 1.67 Å. In the second P site, P(2) is bonded to one O(2), one O(4), one O(7), and one O(8) atom to form PO4 tetrahedra that share corners with two equivalent Zn(1)O4 tetrahedra. The P(2)-O(2) bond length is 1.54 Å. The P(2)-O(4) bond length is 1.53 Å. The P(2)-O(7) bond length is 1.73 Å. The P(2)-O(8) bond length is 1.50 Å. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Zn(1) and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Rb(1), one Zn(1), and one P(2) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Rb(1), one Zn(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Rb(1), one Zn(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a single-bond geometry to one Rb(1) and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Rb(1) and one P(1) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Rb(1) and one P(2) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to two equivalent Rb(1) and one P(2) atom. In the ninth O site, O(9) is bonded in a single-bond geometry to one Rb(1) atom.