Materials Data on CsSb2F7 by Materials Project
CsSb2F7 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Cs1+ is bonded in a 12-coordinate geometry to ten F1- atoms. There are a spread of Cs–F bond distances ranging from 3.19–3.35 Å. Sb3+ is bonded in a distorted rectangular see-saw-like geometry to four F1- atoms. There are a spread of Sb–F bond distances ranging from 1.98–2.27 Å. There are four inequivalent F1- sites. In the first F1- site, F1- is bonded in a single-bond geometry to one Sb3+ atom. In the second F1- site, F1- is bonded in a distorted single-bond geometry to two equivalent Cs1+ and one Sb3+ atom. In the third F1- site, F1- is bonded in a distorted single-bond geometry to three equivalent Cs1+ and one Sb3+ atom. In the fourth F1- site, F1- is bonded in a bent 120 degrees geometry to two equivalent Sb3+ atoms.