Materials Data on Li2Sm2Ge3 by Materials Project
Li2Sm2Ge3 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Li is bonded to three equivalent Sm and four Ge atoms to form a mixture of distorted corner, edge, and face-sharing LiSm3Ge4 tetrahedra. There are one shorter (3.11 Å) and two longer (3.15 Å) Li–Sm bond lengths. There are a spread of Li–Ge bond distances ranging from 2.56–2.72 Å. There are two inequivalent Sm sites. In the first Sm site, Sm is bonded in a 5-coordinate geometry to nine Ge atoms. There are a spread of Sm–Ge bond distances ranging from 3.11–3.31 Å. In the second Sm site, Sm is bonded in a 12-coordinate geometry to six equivalent Li and six Ge atoms. There are four shorter (3.09 Å) and two longer (3.17 Å) Sm–Ge bond lengths. There are two inequivalent Ge sites. In the first Ge site, Ge is bonded in a 1-coordinate geometry to one Li, six Sm, and two equivalent Ge atoms. There are one shorter (2.50 Å) and one longer (2.53 Å) Ge–Ge bond lengths. In the second Ge site, Ge is bonded in a 6-coordinate geometry to six equivalent Li and three Sm atoms.