Rb2ZnI3 crystallizes in the monoclinic P2_1/m space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded to one Zn(1), two equivalent I(1), and four equivalent I(2) atoms to form a mixture of distorted edge and corner-sharing RbZnI6 pentagonal bipyramids. In the second Rb site, Rb(2) is bonded in a 5-coordinate geometry to one I(1) and four equivalent I(2) atoms. Zn(1) is bonded in a 3-coordinate geometry to one Rb(1), one I(1), and two equivalent I(2) atoms. There are two inequivalent I sites. In the first I site, I(1) is bonded in a distorted rectangular see-saw-like geometry to one Rb(2), two equivalent Rb(1), and one Zn(1) atom. In the second I site, I(2) is bonded in a 5-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), and one Zn(1) atom.
Rb2ZnI3 crystallizes in the monoclinic P2_1/m space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded to one Zn(1), two equivalent I(1), and four equivalent I(2) atoms to form a mixture of distorted edge and corner-sharing RbZnI6 pentagonal bipyramids. The Rb(1)-Zn(1) bond length is 3.84 Å. There is one shorter (3.68 Å) and one longer (3.71 Å) Rb(1)-I(1) bond length. There are two shorter (3.91 Å) and two longer (3.97 Å) Rb(1)-I(2) bond lengths. In the second Rb site, Rb(2) is bonded in a 5-coordinate geometry to one I(1) and four equivalent I(2) atoms. The Rb(2)-I(1) bond length is 3.64 Å. There are two shorter (3.71 Å) and two longer (3.75 Å) Rb(2)-I(2) bond lengths. Zn(1) is bonded in a 3-coordinate geometry to one Rb(1), one I(1), and two equivalent I(2) atoms. The Zn(1)-I(1) bond length is 2.81 Å. Both Zn(1)-I(2) bond lengths are 2.79 Å. There are two inequivalent I sites. In the first I site, I(1) is bonded in a distorted rectangular see-saw-like geometry to one Rb(2), two equivalent Rb(1), and one Zn(1) atom. In the second I site, I(2) is bonded in a 5-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), and one Zn(1) atom.