Materials Data on BaSi23 by Materials Project
BaSi23 crystallizes in the cubic Pm-3n space group. The structure is three-dimensional. Ba is bonded in a 8-coordinate geometry to twenty Si atoms. There are eight shorter (3.29 Å) and twelve longer (3.40 Å) Ba–Si bond lengths. There are three inequivalent Si sites. In the first Si site, Si is bonded in a distorted pentagonal planar geometry to one Ba and four Si atoms. There are one shorter (2.32 Å) and three longer (2.40 Å) Si–Si bond lengths. In the second Si site, Si is bonded in a tetrahedral geometry to four equivalent Si atoms. All Si–Si bond lengths are 2.39 Å. In the third Si site, Si is bonded in a 5-coordinate geometry to one Ba and four Si atoms. The Si–Si bond length is 2.40 Å.
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