Materials Data on BaSi2 by Materials Project
BaSi2 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are two inequivalent Ba sites. In the first Ba site, Ba is bonded in a 9-coordinate geometry to nine Si atoms. There are a spread of Ba–Si bond distances ranging from 3.40–3.63 Å. In the second Ba site, Ba is bonded in a 11-coordinate geometry to eleven Si atoms. There are a spread of Ba–Si bond distances ranging from 3.46–3.82 Å. There are three inequivalent Si sites. In the first Si site, Si is bonded in a 8-coordinate geometry to five Ba and three Si atoms. There are two shorter (2.42 Å) and one longer (2.45 Å) Si–Si bond lengths. In the second Si site, Si is bonded in a 8-coordinate geometry to five Ba and three Si atoms. Both Si–Si bond lengths are 2.41 Å. In the third Si site, Si is bonded in a 8-coordinate geometry to five Ba and three Si atoms. The Si–Si bond length is 2.41 Å.