Li8EuSn7 crystallizes in the orthorhombic Cmcm space group. There are five inequivalent Li sites. In the first Li site, Li(1) is bonded in a 5-coordinate geometry to two equivalent Li(2), one Eu(1), one Sn(3), and four equivalent Sn(1) atoms. In the second Li site, Li(2) is bonded to two equivalent Li(1), two equivalent Li(4), four equivalent Li(5), and four equivalent Sn(1) atoms to form LiLi8Sn4 cuboctahedra that share corners with two equivalent Li(2)Li8Sn4 cuboctahedra, edges with four equivalent Sn(1)Li8Eu2Sn2 cuboctahedra, faces with two equivalent Li(2)Li8Sn4 cuboctahedra, and faces with four equivalent Sn(1)Li8Eu2Sn2 cuboctahedra. In the third Li site, Li(3) is bonded in a 9-coordinate geometry to two equivalent Li(3), one Eu(1), one Sn(4), two equivalent Sn(2), and three equivalent Sn(5) atoms. In the fourth Li site, Li(4) is bonded in a 5-coordinate geometry to one Li(2), one Eu(1), one Sn(3), two equivalent Sn(1), and two equivalent Sn(5) atoms. In the fifth Li site, Li(5) is bonded in a 4-coordinate geometry to two equivalent Li(2), one Sn(4), two equivalent Sn(1), and two equivalent Sn(3) atoms. Eu(1) is bonded in a 15-coordinate geometry to one Li(1), two equivalent Li(3), two equivalent Li(4), two equivalent Sn(2), four equivalent Sn(1), and four equivalent Sn(5) atoms. There are five inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to two equivalent Li(1), two equivalent Li(2), two equivalent Li(4), two equivalent Li(5), two equivalent Eu(1), one Sn(1), and one Sn(5) atom to form distorted SnLi8Eu2Sn2 cuboctahedra that share corners with two equivalent Sn(1)Li8Eu2Sn2 cuboctahedra, edges with two equivalent Li(2)Li8Sn4 cuboctahedra, edges with two equivalent Sn(1)Li8Eu2Sn2 cuboctahedra, faces with two equivalent Li(2)Li8Sn4 cuboctahedra, and faces with four equivalent Sn(1)Li8Eu2Sn2 cuboctahedra. In the second Sn site, Sn(2) is bonded in a 4-coordinate geometry to four equivalent Li(3) and two equivalent Eu(1) atoms. In the third Sn site, Sn(3) is bonded in a 7-coordinate geometry to one Li(1), two equivalent Li(4), four equivalent Li(5), and two equivalent Sn(4) atoms. In the fourth Sn site, Sn(4) is bonded in a 8-coordinate geometry to two equivalent Li(3), two equivalent Li(5), two equivalent Sn(3), and two equivalent Sn(5) atoms. In the fifth Sn site, Sn(5) is bonded in a 5-coordinate geometry to two equivalent Li(4), three equivalent Li(3), two equivalent Eu(1), one Sn(1), and one Sn(4) atom.
Li8EuSn7 crystallizes in the orthorhombic Cmcm space group. There are five inequivalent Li sites. In the first Li site, Li(1) is bonded in a 5-coordinate geometry to two equivalent Li(2), one Eu(1), one Sn(3), and four equivalent Sn(1) atoms. Both Li(1)-Li(2) bond lengths are 2.96 Å. The Li(1)-Eu(1) bond length is 3.21 Å. The Li(1)-Sn(3) bond length is 2.78 Å. All Li(1)-Sn(1) bond lengths are 2.97 Å. In the second Li site, Li(2) is bonded to two equivalent Li(1), two equivalent Li(4), four equivalent Li(5), and four equivalent Sn(1) atoms to form LiLi8Sn4 cuboctahedra that share corners with two equivalent Li(2)Li8Sn4 cuboctahedra, edges with four equivalent Sn(1)Li8Eu2Sn2 cuboctahedra, faces with two equivalent Li(2)Li8Sn4 cuboctahedra, and faces with four equivalent Sn(1)Li8Eu2Sn2 cuboctahedra. Both Li(2)-Li(4) bond lengths are 2.93 Å. All Li(2)-Li(5) bond lengths are 2.98 Å. All Li(2)-Sn(1) bond lengths are 3.22 Å. In the third Li site, Li(3) is bonded in a 9-coordinate geometry to two equivalent Li(3), one Eu(1), one Sn(4), two equivalent Sn(2), and three equivalent Sn(5) atoms. Both Li(3)-Li(3) bond lengths are 3.20 Å. The Li(3)-Eu(1) bond length is 3.27 Å. The Li(3)-Sn(4) bond length is 3.30 Å. Both Li(3)-Sn(2) bond lengths are 2.93 Å. There is one shorter (2.86 Å) and two longer (3.08 Å) Li(3)-Sn(5) bond lengths. In the fourth Li site, Li(4) is bonded in a 5-coordinate geometry to one Li(2), one Eu(1), one Sn(3), two equivalent Sn(1), and two equivalent Sn(5) atoms. The Li(4)-Eu(1) bond length is 3.23 Å. The Li(4)-Sn(3) bond length is 2.79 Å. Both Li(4)-Sn(1) bond lengths are 3.04 Å. Both Li(4)-Sn(5) bond lengths are 2.94 Å. In the fifth Li site, Li(5) is bonded in a 4-coordinate geometry to two equivalent Li(2), one Sn(4), two equivalent Sn(1), and two equivalent Sn(3) atoms. The Li(5)-Sn(4) bond length is 3.31 Å. There is one shorter (2.89 Å) and one longer (2.97 Å) Li(5)-Sn(1) bond length. Both Li(5)-Sn(3) bond lengths are 2.88 Å. Eu(1) is bonded in a 15-coordinate geometry to one Li(1), two equivalent Li(3), two equivalent Li(4), two equivalent Sn(2), four equivalent Sn(1), and four equivalent Sn(5) atoms. Both Eu(1)-Sn(2) bond lengths are 3.44 Å. All Eu(1)-Sn(1) bond lengths are 3.44 Å. All Eu(1)-Sn(5) bond lengths are 3.39 Å. There are five inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to two equivalent Li(1), two equivalent Li(2), two equivalent Li(4), two equivalent Li(5), two equivalent Eu(1), one Sn(1), and one Sn(5) atom to form distorted SnLi8Eu2Sn2 cuboctahedra that share corners with two equivalent Sn(1)Li8Eu2Sn2 cuboctahedra, edges with two equivalent Li(2)Li8Sn4 cuboctahedra, edges with two equivalent Sn(1)Li8Eu2Sn2 cuboctahedra, faces with two equivalent Li(2)Li8Sn4 cuboctahedra, and faces with four equivalent Sn(1)Li8Eu2Sn2 cuboctahedra. The Sn(1)-Sn(1) bond length is 2.99 Å. The Sn(1)-Sn(5) bond length is 2.96 Å. In the second Sn site, Sn(2) is bonded in a 4-coordinate geometry to four equivalent Li(3) and two equivalent Eu(1) atoms. In the third Sn site, Sn(3) is bonded in a 7-coordinate geometry to one Li(1), two equivalent Li(4), four equivalent Li(5), and two equivalent Sn(4) atoms. Both Sn(3)-Sn(4) bond lengths are 3.07 Å. In the fourth Sn site, Sn(4) is bonded in a 8-coordinate geometry to two equivalent Li(3), two equivalent Li(5), two equivalent Sn(3), and two equivalent Sn(5) atoms. Both Sn(4)-Sn(5) bond lengths are 3.44 Å. In the fifth Sn site, Sn(5) is bonded in a 5-coordinate geometry to two equivalent Li(4), three equivalent Li(3), two equivalent Eu(1), one Sn(1), and one Sn(4) atom.