UThSb4 crystallizes in the tetragonal P4mm space group. U(1) is bonded in a 9-coordinate geometry to one Sb(3), four equivalent Sb(1), and four equivalent Sb(2) atoms. Th(1) is bonded in a 9-coordinate geometry to one Sb(2), four equivalent Sb(1), and four equivalent Sb(3) atoms. There are three inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 8-coordinate geometry to two equivalent U(1), two equivalent Th(1), and four equivalent Sb(1) atoms. In the second Sb site, Sb(2) is bonded to four equivalent U(1) and one Th(1) atom to form distorted SbThU4 trigonal bipyramids that share corners with four equivalent Sb(2)ThU4 trigonal bipyramids, edges with four equivalent Sb(3)Th4U trigonal bipyramids, and edges with four equivalent Sb(2)ThU4 trigonal bipyramids. In the third Sb site, Sb(3) is bonded to one U(1) and four equivalent Th(1) atoms to form distorted SbTh4U trigonal bipyramids that share corners with four equivalent Sb(3)Th4U trigonal bipyramids, edges with four equivalent Sb(3)Th4U trigonal bipyramids, and edges with four equivalent Sb(2)ThU4 trigonal bipyramids.
UThSb4 crystallizes in the tetragonal P4mm space group. U(1) is bonded in a 9-coordinate geometry to one Sb(3), four equivalent Sb(1), and four equivalent Sb(2) atoms. The U(1)-Sb(3) bond length is 3.21 Å. All U(1)-Sb(1) bond lengths are 3.31 Å. All U(1)-Sb(2) bond lengths are 3.17 Å. Th(1) is bonded in a 9-coordinate geometry to one Sb(2), four equivalent Sb(1), and four equivalent Sb(3) atoms. The Th(1)-Sb(2) bond length is 3.32 Å. All Th(1)-Sb(1) bond lengths are 3.36 Å. All Th(1)-Sb(3) bond lengths are 3.20 Å. There are three inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 8-coordinate geometry to two equivalent U(1), two equivalent Th(1), and four equivalent Sb(1) atoms. All Sb(1)-Sb(1) bond lengths are 3.09 Å. In the second Sb site, Sb(2) is bonded to four equivalent U(1) and one Th(1) atom to form distorted SbThU4 trigonal bipyramids that share corners with four equivalent Sb(2)ThU4 trigonal bipyramids, edges with four equivalent Sb(3)Th4U trigonal bipyramids, and edges with four equivalent Sb(2)ThU4 trigonal bipyramids. In the third Sb site, Sb(3) is bonded to one U(1) and four equivalent Th(1) atoms to form distorted SbTh4U trigonal bipyramids that share corners with four equivalent Sb(3)Th4U trigonal bipyramids, edges with four equivalent Sb(3)Th4U trigonal bipyramids, and edges with four equivalent Sb(2)ThU4 trigonal bipyramids.