LiErSn crystallizes in the hexagonal P6_3mc space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded in a 3-coordinate geometry to two equivalent Er(1), four equivalent Er(2), one Sn(1), and three equivalent Sn(2) atoms. In the second Li site, Li(2) is bonded in a 4-coordinate geometry to six equivalent Er(2), one Sn(1), and three equivalent Sn(2) atoms. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a 12-coordinate geometry to six equivalent Li(1) and six equivalent Sn(2) atoms. In the second Er site, Er(2) is bonded in a 12-coordinate geometry to two equivalent Li(2), four equivalent Li(1), two equivalent Sn(1), and four equivalent Sn(2) atoms. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 10-coordinate geometry to one Li(2), three equivalent Li(1), and six equivalent Er(2) atoms. In the second Sn site, Sn(2) is bonded in a 10-coordinate geometry to one Li(2), three equivalent Li(1), two equivalent Er(1), and four equivalent Er(2) atoms.
LiErSn crystallizes in the hexagonal P6_3mc space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded in a 3-coordinate geometry to two equivalent Er(1), four equivalent Er(2), one Sn(1), and three equivalent Sn(2) atoms. There is one shorter (3.08 Å) and one longer (3.40 Å) Li(1)-Er(1) bond length. There are two shorter (3.14 Å) and two longer (3.35 Å) Li(1)-Er(2) bond lengths. The Li(1)-Sn(1) bond length is 2.68 Å. There are two shorter (2.71 Å) and one longer (3.20 Å) Li(1)-Sn(2) bond length. In the second Li site, Li(2) is bonded in a 4-coordinate geometry to six equivalent Er(2), one Sn(1), and three equivalent Sn(2) atoms. There are three shorter (3.14 Å) and three longer (3.40 Å) Li(2)-Er(2) bond lengths. The Li(2)-Sn(1) bond length is 3.00 Å. All Li(2)-Sn(2) bond lengths are 2.71 Å. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a 12-coordinate geometry to six equivalent Li(1) and six equivalent Sn(2) atoms. There are three shorter (3.16 Å) and three longer (3.31 Å) Er(1)-Sn(2) bond lengths. In the second Er site, Er(2) is bonded in a 12-coordinate geometry to two equivalent Li(2), four equivalent Li(1), two equivalent Sn(1), and four equivalent Sn(2) atoms. There is one shorter (3.15 Å) and one longer (3.32 Å) Er(2)-Sn(1) bond length. There are two shorter (3.21 Å) and two longer (3.26 Å) Er(2)-Sn(2) bond lengths. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 10-coordinate geometry to one Li(2), three equivalent Li(1), and six equivalent Er(2) atoms. In the second Sn site, Sn(2) is bonded in a 10-coordinate geometry to one Li(2), three equivalent Li(1), two equivalent Er(1), and four equivalent Er(2) atoms.