Materials Data on Ce2Si7 by Materials Project
Ce2Si7 crystallizes in the orthorhombic Cmmm space group. The structure is three-dimensional. Ce is bonded in a 8-coordinate geometry to fourteen Si atoms. There are a spread of Ce–Si bond distances ranging from 3.02–3.21 Å. There are three inequivalent Si sites. In the first Si site, Si is bonded in a 9-coordinate geometry to four equivalent Ce and five Si atoms. There are one shorter (2.53 Å) and four longer (2.59 Å) Si–Si bond lengths. In the second Si site, Si is bonded in a body-centered cubic geometry to four equivalent Ce and four equivalent Si atoms. All Si–Si bond lengths are 2.56 Å. In the third Si site, Si is bonded in a 10-coordinate geometry to four equivalent Ce and six Si atoms. There are a spread of Si–Si bond distances ranging from 2.50–2.66 Å.