Materials Data on Ba2YCu3O6F by Materials Project
Ba2YCu3O6F crystallizes in the orthorhombic Pmmm space group. The structure is three-dimensional. Ba2+ is bonded in a 10-coordinate geometry to eight O2- and two equivalent F1- atoms. There are a spread of Ba–O bond distances ranging from 2.80–3.01 Å. Both Ba–F bond lengths are 3.00 Å. Y3+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are four shorter (2.41 Å) and four longer (2.45 Å) Y–O bond lengths. There are two inequivalent Cu2+ sites. In the first Cu2+ site, Cu2+ is bonded to five O2- atoms to form corner-sharing CuO5 square pyramids. There are a spread of Cu–O bond distances ranging from 1.93–2.41 Å. In the second Cu2+ site, Cu2+ is bonded in a square co-planar geometry to two equivalent O2- and two equivalent F1- atoms. Both Cu–O bond lengths are 1.88 Å. Both Cu–F bond lengths are 2.00 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Ba2+, two equivalent Y3+, and two equivalent Cu2+ atoms. In the second O2- site, O2- is bonded in a 6-coordinate geometry to two equivalent Ba2+, two equivalent Y3+, and two equivalent Cu2+ atoms. In the third O2- site, O2- is bonded in a 6-coordinate geometry to four equivalent Ba2+ and two Cu2+ atoms. F1- is bonded in a distorted linear geometry to four equivalent Ba2+ and two equivalent Cu2+ atoms.