Materials Data on K2SbF5 by Materials Project
K2SbF5 crystallizes in the orthorhombic Cmcm space group. The structure is two-dimensional and consists of two K2SbF5 sheets oriented in the (0, 1, 0) direction. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 12-coordinate geometry to twelve F1- atoms. There are a spread of K–F bond distances ranging from 2.91–3.32 Å. In the second K1+ site, K1+ is bonded in a 5-coordinate geometry to five F1- atoms. There are four shorter (2.61 Å) and one longer (2.72 Å) K–F bond lengths. Sb3+ is bonded in a square pyramidal geometry to five F1- atoms. There are one shorter (1.99 Å) and four longer (2.12 Å) Sb–F bond lengths. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded in a 4-coordinate geometry to three K1+ and one Sb3+ atom. In the second F1- site, F1- is bonded in a 2-coordinate geometry to five K1+ and one Sb3+ atom.