Materials Data on Ba2CuF6 by Materials Project

Abstract

Ba2CuF6 crystallizes in the orthorhombic Cmce space group. The structure is three-dimensional. Ba2+ is bonded in a 10-coordinate geometry to ten F1- atoms. There are a spread of Ba–F bond distances ranging from 2.64–3.08 Å. Cu2+ is bonded to six F1- atoms to form corner-sharing CuF6 octahedra. The corner-sharing octahedral tilt angles are 30°. There are a spread of Cu–F bond distances ranging from 1.90–2.43 Å. There are three inequivalent F1- sites. In the first F1- site, F1- is bonded in a single-bond geometry to four equivalent Ba2+ and one Cu2+ atom. In the second F1- site, F1- is bonded in a 4-coordinate geometry to two equivalent Ba2+ and two equivalent Cu2+ atoms. In the third F1- site, F1- is bonded to four equivalent Ba2+ atoms to form a mixture of corner and edge-sharing FBa4 tetrahedra.