Materials Data on CsMnCuF6 by Materials Project
CsMnCuF6 crystallizes in the orthorhombic Imma space group. The structure is three-dimensional. Cs1+ is bonded to six F1- atoms to form distorted CsF6 octahedra that share corners with six equivalent MnF6 octahedra and corners with six equivalent CuF6 octahedra. The corner-sharing octahedra tilt angles range from 68–70°. There are a spread of Cs–F bond distances ranging from 3.19–3.25 Å. Mn3+ is bonded to six F1- atoms to form MnF6 octahedra that share corners with two equivalent MnF6 octahedra, corners with four equivalent CuF6 octahedra, and corners with six equivalent CsF6 octahedra. The corner-sharing octahedra tilt angles range from 42–70°. There is four shorter (1.90 Å) and two longer (2.09 Å) Mn–F bond length. Cu2+ is bonded to six F1- atoms to form CuF6 octahedra that share corners with two equivalent CuF6 octahedra, corners with four equivalent MnF6 octahedra, and corners with six equivalent CsF6 octahedra. The corner-sharing octahedra tilt angles range from 42–69°. There are two shorter (1.93 Å) and four longer (2.10 Å) Cu–F bond lengths. There are three inequivalent F1- sites. In the first F1- site, F1- is bonded in a 2-coordinate geometry to one Cs1+ and two equivalent Mn3+ atoms. In the second F1- site, F1- is bonded in a distorted bent 150 degrees geometry to one Cs1+ and two equivalent Cu2+ atoms. In the third F1- site, F1- is bonded in a 2-coordinate geometry to one Cs1+, one Mn3+, and one Cu2+ atom.