DOE OSTI2020
LiPrSn crystallizes in the hexagonal P6_3mc space group. The structure is three-dimensional. there are two inequivalent Li sites. In the first Li site, Li is bonded in a distorted trigonal planar geometry to six Pr and three Sn atoms. There are a spread of Li–Pr bond distances ranging from 3.23–3.54 Å. There are one shorter (2.78 Å) and two longer (2.81 Å) Li–Sn bond lengths. In the second Li site, Li is bonded in a 4-coordinate geometry to six equivalent Pr and four Sn atoms. There are three shorter (3.25 Å) and three longer (3.65 Å) Li–Pr bond lengths. There are three shorter (2.82 Å) and one longer (3.03 Å) Li–Sn bond lengths. There are two inequivalent Pr sites. In the first Pr site, Pr is bonded in a 12-coordinate geometry to six Li and six Sn atoms. There are a spread of Pr–Sn bond distances ranging from 3.33–3.46 Å. In the second Pr site, Pr is bonded in a 12-coordinate geometry to six equivalent Li and six equivalent Sn atoms. There are three shorter (3.29 Å) and three longer (3.50 Å) Pr–Sn bond lengths. There are two inequivalent Sn sites. In the first Sn site, Sn is bonded in a 3-coordinate geometry to three Li and six Pr atoms. In the second Sn site, Sn is bonded in a 4-coordinate geometry to four Li and six equivalent Pr atoms.