Rb2MnCl4 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 Cl(2) and five equivalent Cl(1) atoms. Mn(1) is bonded to two equivalent Cl(1) and four equivalent Cl(2) atoms to form corner-sharing MnCl6 octahedra. The corner-sharing octahedra are not tilted. There are two inequivalent Cl sites. In the first Cl site, Cl(2) is bonded to four equivalent Rb(1) and two equivalent Mn(1) atoms to form distorted ClRb4Mn2 octahedra that share corners with two equivalent Cl(2)Rb4Mn2 octahedra, corners with twelve equivalent Cl(1)Rb5Mn octahedra, edges with two equivalent Cl(2)Rb4Mn2 octahedra, faces with four equivalent Cl(2)Rb4Mn2 octahedra, and faces with four equivalent Cl(1)Rb5Mn octahedra. The corner-sharing octahedral tilt angles range from 0-56°. In the second Cl site, Cl(1) is bonded to five equivalent Rb(1) and one Mn(1) atom to form distorted ClRb5Mn octahedra that share corners with five equivalent Cl(1)Rb5Mn octahedra, corners with twelve equivalent Cl(2)Rb4Mn2 octahedra, edges with eight equivalent Cl(1)Rb5Mn octahedra, and faces with four equivalent Cl(2)Rb4Mn2 octahedra. The corner-sharing octahedral tilt angles range from 0-56°.
Rb2MnCl4 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 Cl(2) and five equivalent Cl(1) atoms. All Rb(1)-Cl(2) bond lengths are 3.41 Å. There is one shorter (3.28 Å) and four longer (3.57 Å) Rb(1)-Cl(1) bond lengths. Mn(1) is bonded to two equivalent Cl(1) and four equivalent Cl(2) atoms to form corner-sharing MnCl6 octahedra. The corner-sharing octahedra are not tilted. Both Mn(1)-Cl(1) bond lengths are 2.53 Å. All Mn(1)-Cl(2) bond lengths are 2.52 Å. There are two inequivalent Cl sites. In the first Cl site, Cl(2) is bonded to four equivalent Rb(1) and two equivalent Mn(1) atoms to form distorted ClRb4Mn2 octahedra that share corners with two equivalent Cl(2)Rb4Mn2 octahedra, corners with twelve equivalent Cl(1)Rb5Mn octahedra, edges with two equivalent Cl(2)Rb4Mn2 octahedra, faces with four equivalent Cl(2)Rb4Mn2 octahedra, and faces with four equivalent Cl(1)Rb5Mn octahedra. The corner-sharing octahedral tilt angles range from 0-56°. In the second Cl site, Cl(1) is bonded to five equivalent Rb(1) and one Mn(1) atom to form distorted ClRb5Mn octahedra that share corners with five equivalent Cl(1)Rb5Mn octahedra, corners with twelve equivalent Cl(2)Rb4Mn2 octahedra, edges with eight equivalent Cl(1)Rb5Mn octahedra, and faces with four equivalent Cl(2)Rb4Mn2 octahedra. The corner-sharing octahedral tilt angles range from 0-56°.