Rb2ZnF4 is (La,Ba)CuO4 structured and crystallizes in the tetragonal I4/mmm space group. Rb(1) is bonded in a 9-coordinate geometry to four equivalent F(2) and five equivalent F(1) atoms. Zn(1) is bonded to two equivalent F(1) and four equivalent F(2) atoms to form corner-sharing ZnF6 octahedra. The corner-sharing octahedra are not tilted. There are two inequivalent F sites. In the first F site, F(2) is bonded to four equivalent Rb(1) and two equivalent Zn(1) atoms to form distorted FRb4Zn2 octahedra that share corners with two equivalent F(2)Rb4Zn2 octahedra, corners with twelve equivalent F(1)Rb5Zn octahedra, edges with two equivalent F(2)Rb4Zn2 octahedra, faces with four equivalent F(2)Rb4Zn2 octahedra, and faces with four equivalent F(1)Rb5Zn octahedra. The corner-sharing octahedral tilt angles range from 0-59°. In the second F site, F(1) is bonded to five equivalent Rb(1) and one Zn(1) atom to form distorted FRb5Zn octahedra that share corners with five equivalent F(1)Rb5Zn octahedra, corners with twelve equivalent F(2)Rb4Zn2 octahedra, edges with eight equivalent F(1)Rb5Zn octahedra, and faces with four equivalent F(2)Rb4Zn2 octahedra. The corner-sharing octahedral tilt angles range from 0-59°.
Rb2ZnF4 is (La,Ba)CuO4 structured and crystallizes in the tetragonal I4/mmm space group. Rb(1) is bonded in a 9-coordinate geometry to four equivalent F(2) and five equivalent F(1) atoms. All Rb(1)-F(2) bond lengths are 2.88 Å. There is one shorter (2.81 Å) and four longer (2.92 Å) Rb(1)-F(1) bond lengths. Zn(1) is bonded to two equivalent F(1) and four equivalent F(2) atoms to form corner-sharing ZnF6 octahedra. The corner-sharing octahedra are not tilted. Both Zn(1)-F(1) bond lengths are 2.02 Å. All Zn(1)-F(2) bond lengths are 2.06 Å. There are two inequivalent F sites. In the first F site, F(2) is bonded to four equivalent Rb(1) and two equivalent Zn(1) atoms to form distorted FRb4Zn2 octahedra that share corners with two equivalent F(2)Rb4Zn2 octahedra, corners with twelve equivalent F(1)Rb5Zn octahedra, edges with two equivalent F(2)Rb4Zn2 octahedra, faces with four equivalent F(2)Rb4Zn2 octahedra, and faces with four equivalent F(1)Rb5Zn octahedra. The corner-sharing octahedral tilt angles range from 0-59°. In the second F site, F(1) is bonded to five equivalent Rb(1) and one Zn(1) atom to form distorted FRb5Zn octahedra that share corners with five equivalent F(1)Rb5Zn octahedra, corners with twelve equivalent F(2)Rb4Zn2 octahedra, edges with eight equivalent F(1)Rb5Zn octahedra, and faces with four equivalent F(2)Rb4Zn2 octahedra. The corner-sharing octahedral tilt angles range from 0-59°.