Materials Data on BaCO3 by Materials Project

Abstract

BaCO3 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are two inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded to eight equivalent O2- atoms to form edge-sharing BaO8 hexagonal bipyramids. There are four shorter (2.72 Å) and four longer (2.97 Å) Ba–O bond lengths. In the second Ba2+ site, Ba2+ is bonded in a 2-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.64–3.06 Å. C4+ is bonded in a trigonal planar geometry to three O2- atoms. There is one shorter (1.29 Å) and two longer (1.30 Å) C–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to three Ba2+ and one C4+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to three equivalent Ba2+ and one C4+ atom.