Materials Data on EuAl3Si by Materials Project
EuAl3Si crystallizes in the tetragonal I4mm space group. The structure is three-dimensional. Eu is bonded in a 8-coordinate geometry to twelve Al and four equivalent Si atoms. There are a spread of Eu–Al bond distances ranging from 3.32–3.50 Å. All Eu–Si bond lengths are 3.32 Å. There are two inequivalent Al sites. In the first Al site, Al is bonded in a 2-coordinate geometry to four equivalent Eu, two equivalent Al, and two equivalent Si atoms. Both Al–Al bond lengths are 2.63 Å. Both Al–Si bond lengths are 2.60 Å. In the second Al site, Al is bonded in a distorted single-bond geometry to four equivalent Eu, four equivalent Al, and one Si atom. The Al–Si bond length is 2.52 Å. Si is bonded in a 9-coordinate geometry to four equivalent Eu and five Al atoms.