Materials Data on LiEu2Si3 by Materials Project
LiEu2Si3 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. Li is bonded in a distorted trigonal planar geometry to six Eu and three Si atoms. There are a spread of Li–Eu bond distances ranging from 3.08–3.44 Å. There are one shorter (2.52 Å) and two longer (2.56 Å) Li–Si bond lengths. There are two inequivalent Eu sites. In the first Eu site, Eu is bonded to three equivalent Li and nine Si atoms to form a mixture of distorted edge and face-sharing EuLi3Si9 cuboctahedra. There are a spread of Eu–Si bond distances ranging from 3.17–3.33 Å. In the second Eu site, Eu is bonded to three equivalent Li and nine Si atoms to form a mixture of distorted edge and face-sharing EuLi3Si9 cuboctahedra. There are a spread of Eu–Si bond distances ranging from 3.15–3.28 Å. There are three inequivalent Si sites. In the first Si site, Si is bonded in a distorted bent 120 degrees geometry to two equivalent Li, six Eu, and one Si atom. The Si–Si bond length is 2.34 Å. In the second Si site, Si is bonded in a distorted single-bond geometry to one Li, six Eu, and one Si atom. The Si–Si bond length is 2.37 Å. In the third Si site, Si is bonded in a 9-coordinate geometry to six Eu and three Si atoms. The Si–Si bond length is 2.40 Å.