Materials Data on Eu5Si3 by Materials Project
Eu5Si3 crystallizes in the tetragonal I4/mcm space group. The structure is three-dimensional. there are two inequivalent Eu+2.40+ sites. In the first Eu+2.40+ site, Eu+2.40+ is bonded to five Si4- atoms to form a mixture of edge, face, and corner-sharing EuSi5 trigonal bipyramids. There are a spread of Eu–Si bond distances ranging from 3.17–3.27 Å. In the second Eu+2.40+ site, Eu+2.40+ is bonded in a distorted square co-planar geometry to four equivalent Si4- atoms. All Eu–Si bond lengths are 3.16 Å. There are two inequivalent Si4- sites. In the first Si4- site, Si4- is bonded in a 9-coordinate geometry to eight Eu+2.40+ and one Si4- atom. The Si–Si bond length is 2.44 Å. In the second Si4- site, Si4- is bonded in a 10-coordinate geometry to eight equivalent Eu+2.40+ atoms.