Rb2MnF4 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. Mn(1) is bonded to two equivalent F(1) and four equivalent F(2) atoms to form corner-sharing MnF6 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 Mn(1) atoms to form distorted FRb4Mn2 octahedra that share corners with two equivalent F(2)Rb4Mn2 octahedra, corners with twelve equivalent F(1)Rb5Mn octahedra, edges with two equivalent F(2)Rb4Mn2 octahedra, faces with four equivalent F(2)Rb4Mn2 octahedra, and faces with four equivalent F(1)Rb5Mn octahedra. The corner-sharing octahedral tilt angles range from 0-58°. In the second F site, F(1) is bonded to five equivalent Rb(1) and one Mn(1) atom to form distorted FRb5Mn octahedra that share corners with five equivalent F(1)Rb5Mn octahedra, corners with twelve equivalent F(2)Rb4Mn2 octahedra, edges with eight equivalent F(1)Rb5Mn octahedra, and faces with four equivalent F(2)Rb4Mn2 octahedra. The corner-sharing octahedral tilt angles range from 0-58°.
Rb2MnF4 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 2.92 Å. There is one shorter (2.77 Å) and four longer (2.99 Å) Rb(1)-F(1) bond lengths. Mn(1) is bonded to two equivalent F(1) and four equivalent F(2) atoms to form corner-sharing MnF6 octahedra. The corner-sharing octahedra are not tilted. Both Mn(1)-F(1) bond lengths are 2.11 Å. All Mn(1)-F(2) bond lengths are 2.11 Å. There are two inequivalent F sites. In the first F site, F(2) is bonded to four equivalent Rb(1) and two equivalent Mn(1) atoms to form distorted FRb4Mn2 octahedra that share corners with two equivalent F(2)Rb4Mn2 octahedra, corners with twelve equivalent F(1)Rb5Mn octahedra, edges with two equivalent F(2)Rb4Mn2 octahedra, faces with four equivalent F(2)Rb4Mn2 octahedra, and faces with four equivalent F(1)Rb5Mn octahedra. The corner-sharing octahedral tilt angles range from 0-58°. In the second F site, F(1) is bonded to five equivalent Rb(1) and one Mn(1) atom to form distorted FRb5Mn octahedra that share corners with five equivalent F(1)Rb5Mn octahedra, corners with twelve equivalent F(2)Rb4Mn2 octahedra, edges with eight equivalent F(1)Rb5Mn octahedra, and faces with four equivalent F(2)Rb4Mn2 octahedra. The corner-sharing octahedral tilt angles range from 0-58°.