RbNa2Fe3P4O14Cl crystallizes in the monoclinic C2/c space group. Rb(1) is bonded in a 10-coordinate geometry to two equivalent O(2), two equivalent O(3), four equivalent O(1), and two equivalent Cl(1) atoms. Na(1) is bonded in a 6-coordinate geometry to one O(5), one O(7), two equivalent O(3), and two equivalent O(6) atoms. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(3), one O(4), one O(5), one O(6), one O(7), and one Cl(1) atom to form distorted FeClO5 octahedra that share  a cornercorner with one Fe(1)ClO5 octahedra, corners with two equivalent P(2)O4 tetrahedra, and corners with three equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 10°. In the second Fe site, Fe(2) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(4), and two equivalent Cl(1) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(2), one O(4), one O(5), and one O(7) atom to form PO4 tetrahedra that share corners with three equivalent Fe(1)ClO5 octahedra and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 33-52°. In the second P site, P(2) is bonded to one O(1), one O(2), one O(3), and one O(6) atom to form PO4 tetrahedra that share corners with two equivalent Fe(1)ClO5 octahedra and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 44-56°. There are seven inequivalent O sites. In the first O site, O(6) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Fe(1), and one P(2) atom. In the second O site, O(7) is bonded in a 3-coordinate geometry to one Na(1), one Fe(1), and one P(1) atom. In the third O site, O(1) is bonded in a distorted bent 120 degrees geometry to two equivalent Rb(1), one Fe(2), and one P(2) atom. In the fourth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Na(1), one Fe(1), and one P(1) atom. In the fifth O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Rb(1), one P(1), and one P(2) atom. In the sixth O site, O(3) is bonded in a 1-coordinate geometry to one Rb(1), two equivalent Na(1), one Fe(1), and one P(2) atom. In the seventh O site, O(4) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(2), and one P(1) atom. Cl(1) is bonded to two equivalent Rb(1), two equivalent Fe(1), and two equivalent Fe(2) atoms to form distorted corner-sharing ClRb2Fe4 octahedra. The corner-sharing octahedra are not tilted.
RbNa2Fe3P4O14Cl crystallizes in the monoclinic C2/c space group. Rb(1) is bonded in a 10-coordinate geometry to two equivalent O(2), two equivalent O(3), four equivalent O(1), and two equivalent Cl(1) atoms. Both Rb(1)-O(2) bond lengths are 3.16 Å. Both Rb(1)-O(3) bond lengths are 3.37 Å. There are two shorter (3.17 Å) and two longer (3.22 Å) Rb(1)-O(1) bond lengths. Both Rb(1)-Cl(1) bond lengths are 3.48 Å. Na(1) is bonded in a 6-coordinate geometry to one O(5), one O(7), two equivalent O(3), and two equivalent O(6) atoms. The Na(1)-O(5) bond length is 2.46 Å. The Na(1)-O(7) bond length is 2.38 Å. There is one shorter (2.38 Å) and one longer (2.72 Å) Na(1)-O(3) bond length. There is one shorter (2.45 Å) and one longer (2.55 Å) Na(1)-O(6) bond length. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(3), one O(4), one O(5), one O(6), one O(7), and one Cl(1) atom to form distorted FeClO5 octahedra that share  a cornercorner with one Fe(1)ClO5 octahedra, corners with two equivalent P(2)O4 tetrahedra, and corners with three equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 10°. The Fe(1)-O(3) bond length is 2.17 Å. The Fe(1)-O(4) bond length is 2.20 Å. The Fe(1)-O(5) bond length is 2.10 Å. The Fe(1)-O(6) bond length is 2.18 Å. The Fe(1)-O(7) bond length is 2.13 Å. The Fe(1)-Cl(1) bond length is 2.87 Å. In the second Fe site, Fe(2) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(4), and two equivalent Cl(1) atoms. Both Fe(2)-O(1) bond lengths are 1.98 Å. Both Fe(2)-O(4) bond lengths are 2.34 Å. There is one shorter (2.52 Å) and one longer (2.74 Å) Fe(2)-Cl(1) bond length. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(2), one O(4), one O(5), and one O(7) atom to form PO4 tetrahedra that share corners with three equivalent Fe(1)ClO5 octahedra and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 33-52°. The P(1)-O(2) bond length is 1.64 Å. The P(1)-O(4) bond length is 1.54 Å. The P(1)-O(5) bond length is 1.54 Å. The P(1)-O(7) bond length is 1.52 Å. In the second P site, P(2) is bonded to one O(1), one O(2), one O(3), and one O(6) atom to form PO4 tetrahedra that share corners with two equivalent Fe(1)ClO5 octahedra and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 44-56°. The P(2)-O(1) bond length is 1.53 Å. The P(2)-O(2) bond length is 1.63 Å. The P(2)-O(3) bond length is 1.54 Å. The P(2)-O(6) bond length is 1.54 Å. There are seven inequivalent O sites. In the first O site, O(6) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Fe(1), and one P(2) atom. In the second O site, O(7) is bonded in a 3-coordinate geometry to one Na(1), one Fe(1), and one P(1) atom. In the third O site, O(1) is bonded in a distorted bent 120 degrees geometry to two equivalent Rb(1), one Fe(2), and one P(2) atom. In the fourth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Na(1), one Fe(1), and one P(1) atom. In the fifth O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Rb(1), one P(1), and one P(2) atom. In the sixth O site, O(3) is bonded in a 1-coordinate geometry to one Rb(1), two equivalent Na(1), one Fe(1), and one P(2) atom. In the seventh O site, O(4) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(2), and one P(1) atom. Cl(1) is bonded to two equivalent Rb(1), two equivalent Fe(1), and two equivalent Fe(2) atoms to form distorted corner-sharing ClRb2Fe4 octahedra. The corner-sharing octahedra are not tilted.