Th(NiSn)2 crystallizes in the tetragonal P4/nmm space group. Th(1) is bonded in a 16-coordinate geometry to four equivalent Ni(1), four equivalent Ni(2), four equivalent Sn(1), and four equivalent Sn(2) atoms. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 8-coordinate geometry to four equivalent Th(1) and four equivalent Sn(1) atoms. In the second Ni site, Ni(2) is bonded in a 9-coordinate geometry to four equivalent Th(1), one 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 9-coordinate geometry to four equivalent Th(1), one Ni(2), and four equivalent Ni(1) atoms. In the second Sn site, Sn(2) is bonded in a 4-coordinate geometry to four equivalent Th(1) and four equivalent Ni(2) atoms.
Th(NiSn)2 crystallizes in the tetragonal P4/nmm space group. Th(1) is bonded in a 16-coordinate geometry to four equivalent Ni(1), four equivalent Ni(2), four equivalent Sn(1), and four equivalent Sn(2) atoms. All Th(1)-Ni(1) bond lengths are 3.22 Å. All Th(1)-Ni(2) bond lengths are 3.43 Å. All Th(1)-Sn(1) bond lengths are 3.31 Å. All Th(1)-Sn(2) bond lengths are 3.48 Å. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 8-coordinate geometry to four equivalent Th(1) and four equivalent Sn(1) atoms. All Ni(1)-Sn(1) bond lengths are 2.55 Å. In the second Ni site, Ni(2) is bonded in a 9-coordinate geometry to four equivalent Th(1), one Sn(1), and four equivalent Sn(2) atoms. The Ni(2)-Sn(1) bond length is 2.49 Å. All Ni(2)-Sn(2) bond lengths are 2.55 Å. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 9-coordinate geometry to four equivalent Th(1), one Ni(2), and four equivalent Ni(1) atoms. In the second Sn site, Sn(2) is bonded in a 4-coordinate geometry to four equivalent Th(1) and four equivalent Ni(2) atoms.