Materials Data on BaNaCe2C4O12F by Materials Project

Abstract

NaBaCe2C4O12F crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Na1+ is bonded in a 6-coordinate geometry to six equivalent O2- atoms. All Na–O bond lengths are 2.40 Å. Ba2+ is bonded to twelve equivalent O2- atoms to form edge-sharing BaO12 cuboctahedra. All Ba–O bond lengths are 3.00 Å. Ce3+ is bonded in a 10-coordinate geometry to nine O2- and one F1- atom. There are three shorter (2.52 Å) and six longer (2.67 Å) Ce–O bond lengths. The Ce–F bond length is 2.39 Å. There are two inequivalent C4+ sites. In the first C4+ site, C4+ is bonded in a trigonal planar geometry to three equivalent O2- atoms. All C–O bond lengths are 1.29 Å. In the second C4+ site, C4+ is bonded in a trigonal planar geometry to three equivalent O2- atoms. All C–O bond lengths are 1.30 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to one Na1+, two equivalent Ce3+, and one C4+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Ba2+, one Ce3+, and one C4+ atom. F1- is bonded in a distorted linear geometry to two equivalent Ce3+ atoms.