U5Sn4 crystallizes in the hexagonal P6_3/mcm space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a 8-coordinate geometry to two equivalent U(1) and six equivalent Sn(2) atoms. In the second U site, U(2) is bonded to two equivalent Sn(1) and five equivalent Sn(2) atoms to form a mixture of distorted corner, face, and edge-sharing USn7 pentagonal bipyramids. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 8-coordinate geometry to six equivalent U(2) and two equivalent Sn(1) atoms. In the second Sn site, Sn(2) is bonded in a 9-coordinate geometry to four equivalent U(1) and five equivalent U(2) atoms.
U5Sn4 crystallizes in the hexagonal P6_3/mcm space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a 8-coordinate geometry to two equivalent U(1) and six equivalent Sn(2) atoms. Both U(1)-U(1) bond lengths are 3.09 Å. All U(1)-Sn(2) bond lengths are 3.33 Å. In the second U site, U(2) is bonded to two equivalent Sn(1) and five equivalent Sn(2) atoms to form a mixture of distorted corner, face, and edge-sharing USn7 pentagonal bipyramids. Both U(2)-Sn(1) bond lengths are 3.12 Å. There are a spread of U(2)-Sn(2) bond distances ranging from 3.15-3.19 Å. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 8-coordinate geometry to six equivalent U(2) and two equivalent Sn(1) atoms. Both Sn(1)-Sn(1) bond lengths are 3.09 Å. In the second Sn site, Sn(2) is bonded in a 9-coordinate geometry to four equivalent U(1) and five equivalent U(2) atoms.