Th5Sn4 crystallizes in the hexagonal P6_3/mcm space group. There are two inequivalent Th sites. In the first Th site, Th(1) is bonded in a 8-coordinate geometry to two equivalent Th(1) and six equivalent Sn(2) atoms. In the second Th site, Th(2) is bonded to two equivalent Sn(1) and five equivalent Sn(2) atoms to form a mixture of distorted edge, corner, and face-sharing ThSn7 pentagonal bipyramids. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to six equivalent Th(2) atoms to form distorted face-sharing SnTh6 octahedra. In the second Sn site, Sn(2) is bonded in a 9-coordinate geometry to four equivalent Th(1) and five equivalent Th(2) atoms.
Th5Sn4 crystallizes in the hexagonal P6_3/mcm space group. There are two inequivalent Th sites. In the first Th site, Th(1) is bonded in a 8-coordinate geometry to two equivalent Th(1) and six equivalent Sn(2) atoms. Both Th(1)-Th(1) bond lengths are 3.29 Å. All Th(1)-Sn(2) bond lengths are 3.45 Å. In the second Th site, Th(2) is bonded to two equivalent Sn(1) and five equivalent Sn(2) atoms to form a mixture of distorted edge, corner, and face-sharing ThSn7 pentagonal bipyramids. Both Th(2)-Sn(1) bond lengths are 3.17 Å. There are a spread of Th(2)-Sn(2) bond distances ranging from 3.31-3.43 Å. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to six equivalent Th(2) atoms to form distorted face-sharing SnTh6 octahedra. In the second Sn site, Sn(2) is bonded in a 9-coordinate geometry to four equivalent Th(1) and five equivalent Th(2) atoms.