Materials Data on K2MoO2F5 by Materials Project

Abstract

K2MoO2F5 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are two inequivalent K sites. In the first K site, K is bonded in a 8-coordinate geometry to three O and five F atoms. There are one shorter (2.94 Å) and two longer (3.04 Å) K–O bond lengths. There are a spread of K–F bond distances ranging from 2.66–3.04 Å. In the second K site, K is bonded in a 10-coordinate geometry to ten F atoms. There are a spread of K–F bond distances ranging from 2.91–3.07 Å. Mo is bonded in an octahedral geometry to one O and five F atoms. The Mo–O bond length is 1.72 Å. There are a spread of Mo–F bond distances ranging from 1.99–2.08 Å. There are two inequivalent O sites. In the first O site, O is bonded in a distorted single-bond geometry to one K and one Mo atom. In the second O site, O is bonded in a water-like geometry to two equivalent K atoms. There are four inequivalent F sites. In the first F site, F is bonded in a 4-coordinate geometry to three K and one Mo atom. In the second F site, F is bonded in a distorted single-bond geometry to three K and one Mo atom. In the third F site, F is bonded to three K and one Mo atom to form distorted edge-sharing FK3Mo tetrahedra. In the fourth F site, F is bonded in a 4-coordinate geometry to three K and one Mo atom.