Materials Data on BaSiC by Materials Project

Abstract

BaSiC crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are two inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded to five Si4- atoms to form a mixture of corner and edge-sharing BaSi5 trigonal bipyramids. There are a spread of Ba–Si bond distances ranging from 3.33–3.46 Å. In the second Ba2+ site, Ba2+ is bonded in a 5-coordinate geometry to five Si4- atoms. There are a spread of Ba–Si bond distances ranging from 3.20–3.48 Å. There are two inequivalent Si4- sites. In the first Si4- site, Si4- is bonded in a 8-coordinate geometry to five Ba2+ and two equivalent C2+ atoms. Both Si–C bond lengths are 2.01 Å. In the second Si4- site, Si4- is bonded in a 8-coordinate geometry to five Ba2+ and two equivalent C2+ atoms. Both Si–C bond lengths are 2.00 Å. C2+ is bonded in a 2-coordinate geometry to two Si4- atoms.