UThPrS5 crystallizes in the orthorhombic P2_12_12_1 space group. U(1) is bonded to one S(3), one S(4), one S(5), two equivalent S(1), and two equivalent S(2) atoms to form distorted edge-sharing US7 pentagonal bipyramids. Th(1) is bonded in a 8-coordinate geometry to two equivalent S(2), two equivalent S(3), two equivalent S(4), and two equivalent S(5) atoms. Pr(1) is bonded in a 8-coordinate geometry to two equivalent S(1), two equivalent S(3), two equivalent S(4), and two equivalent S(5) atoms. There are five inequivalent S sites. In the first S site, S(1) is bonded to two equivalent U(1) and two equivalent Pr(1) atoms to form distorted SPr2U2 trigonal pyramids that share corners with two equivalent S(3)Pr2Th2U square pyramids, corners with four equivalent S(5)Pr2Th2U square pyramids, corners with two equivalent S(2)Th2U2 tetrahedra, corners with two equivalent S(4)Pr2Th2U trigonal bipyramids, corners with four equivalent S(1)Pr2U2 trigonal pyramids,  an edgeedge with one S(5)Pr2Th2U square pyramid, edges with two equivalent S(3)Pr2Th2U square pyramids,  an edgeedge with one S(2)Th2U2 tetrahedra, and edges with two equivalent S(4)Pr2Th2U trigonal bipyramids. In the second S site, S(2) is bonded to two equivalent U(1) and two equivalent Th(1) atoms to form distorted STh2U2 tetrahedra that share corners with two equivalent S(3)Pr2Th2U square pyramids, corners with four equivalent S(5)Pr2Th2U square pyramids, corners with four equivalent S(2)Th2U2 tetrahedra, corners with two equivalent S(4)Pr2Th2U trigonal bipyramids, corners with two equivalent S(1)Pr2U2 trigonal pyramids,  an edgeedge with one S(5)Pr2Th2U square pyramid, edges with two equivalent S(3)Pr2Th2U square pyramids, edges with two equivalent S(4)Pr2Th2U trigonal bipyramids, and  an edgeedge with one S(1)Pr2U2 trigonal pyramid. In the third S site, S(3) is bonded to one U(1), two equivalent Th(1), and two equivalent Pr(1) atoms to form SPr2Th2U square pyramids that share corners with four equivalent S(3)Pr2Th2U square pyramids, corners with four equivalent S(5)Pr2Th2U square pyramids, corners with two equivalent S(2)Th2U2 tetrahedra,  a cornercorner with one S(4)Pr2Th2U trigonal bipyramid, corners with two equivalent S(1)Pr2U2 trigonal pyramids,  an edgeedge with one S(5)Pr2Th2U square pyramid, edges with two equivalent S(2)Th2U2 tetrahedra, edges with four equivalent S(4)Pr2Th2U trigonal bipyramids, edges with two equivalent S(1)Pr2U2 trigonal pyramids, and  a faceface with one S(5)Pr2Th2U square pyramid. In the fourth S site, S(4) is bonded to one U(1), two equivalent Th(1), and two equivalent Pr(1) atoms to form distorted SPr2Th2U trigonal bipyramids that share  a cornercorner with one S(3)Pr2Th2U square pyramid, corners with five equivalent S(5)Pr2Th2U square pyramids, corners with two equivalent S(2)Th2U2 tetrahedra, corners with four equivalent S(4)Pr2Th2U trigonal bipyramids, corners with two equivalent S(1)Pr2U2 trigonal pyramids, edges with two equivalent S(5)Pr2Th2U square pyramids, edges with four equivalent S(3)Pr2Th2U square pyramids, edges with two equivalent S(2)Th2U2 tetrahedra, and edges with two equivalent S(1)Pr2U2 trigonal pyramids. In the fifth S site, S(5) is bonded to one U(1), two equivalent Th(1), and two equivalent Pr(1) atoms to form SPr2Th2U square pyramids that share corners with four equivalent S(3)Pr2Th2U square pyramids, corners with four equivalent S(2)Th2U2 tetrahedra, corners with five equivalent S(4)Pr2Th2U trigonal bipyramids, corners with four equivalent S(1)Pr2U2 trigonal pyramids,  an edgeedge with one S(3)Pr2Th2U square pyramid, edges with two equivalent S(5)Pr2Th2U square pyramids,  an edgeedge with one S(2)Th2U2 tetrahedra, edges with two equivalent S(4)Pr2Th2U trigonal bipyramids,  an edgeedge with one S(1)Pr2U2 trigonal pyramid, and  a faceface with one S(3)Pr2Th2U square pyramid.
UThPrS5 crystallizes in the orthorhombic P2_12_12_1 space group. U(1) is bonded to one S(3), one S(4), one S(5), two equivalent S(1), and two equivalent S(2) atoms to form distorted edge-sharing US7 pentagonal bipyramids. The U(1)-S(3) bond length is 2.82 Å. The U(1)-S(4) bond length is 2.83 Å. The U(1)-S(5) bond length is 2.91 Å. There is one shorter (2.68 Å) and one longer (2.71 Å) U(1)-S(1) bond length. There is one shorter (2.70 Å) and one longer (2.76 Å) U(1)-S(2) bond length. Th(1) is bonded in a 8-coordinate geometry to two equivalent S(2), two equivalent S(3), two equivalent S(4), and two equivalent S(5) atoms. There is one shorter (2.86 Å) and one longer (2.91 Å) Th(1)-S(2) bond length. There is one shorter (2.88 Å) and one longer (2.91 Å) Th(1)-S(3) bond length. There is one shorter (2.94 Å) and one longer (3.01 Å) Th(1)-S(4) bond length. There is one shorter (2.94 Å) and one longer (2.96 Å) Th(1)-S(5) bond length. Pr(1) is bonded in a 8-coordinate geometry to two equivalent S(1), two equivalent S(3), two equivalent S(4), and two equivalent S(5) atoms. There is one shorter (2.91 Å) and one longer (2.92 Å) Pr(1)-S(1) bond length. There is one shorter (2.95 Å) and one longer (2.97 Å) Pr(1)-S(3) bond length. There is one shorter (3.01 Å) and one longer (3.11 Å) Pr(1)-S(4) bond length. There is one shorter (2.97 Å) and one longer (3.00 Å) Pr(1)-S(5) bond length. There are five inequivalent S sites. In the first S site, S(1) is bonded to two equivalent U(1) and two equivalent Pr(1) atoms to form distorted SPr2U2 trigonal pyramids that share corners with two equivalent S(3)Pr2Th2U square pyramids, corners with four equivalent S(5)Pr2Th2U square pyramids, corners with two equivalent S(2)Th2U2 tetrahedra, corners with two equivalent S(4)Pr2Th2U trigonal bipyramids, corners with four equivalent S(1)Pr2U2 trigonal pyramids,  an edgeedge with one S(5)Pr2Th2U square pyramid, edges with two equivalent S(3)Pr2Th2U square pyramids,  an edgeedge with one S(2)Th2U2 tetrahedra, and edges with two equivalent S(4)Pr2Th2U trigonal bipyramids. In the second S site, S(2) is bonded to two equivalent U(1) and two equivalent Th(1) atoms to form distorted STh2U2 tetrahedra that share corners with two equivalent S(3)Pr2Th2U square pyramids, corners with four equivalent S(5)Pr2Th2U square pyramids, corners with four equivalent S(2)Th2U2 tetrahedra, corners with two equivalent S(4)Pr2Th2U trigonal bipyramids, corners with two equivalent S(1)Pr2U2 trigonal pyramids,  an edgeedge with one S(5)Pr2Th2U square pyramid, edges with two equivalent S(3)Pr2Th2U square pyramids, edges with two equivalent S(4)Pr2Th2U trigonal bipyramids, and  an edgeedge with one S(1)Pr2U2 trigonal pyramid. In the third S site, S(3) is bonded to one U(1), two equivalent Th(1), and two equivalent Pr(1) atoms to form SPr2Th2U square pyramids that share corners with four equivalent S(3)Pr2Th2U square pyramids, corners with four equivalent S(5)Pr2Th2U square pyramids, corners with two equivalent S(2)Th2U2 tetrahedra,  a cornercorner with one S(4)Pr2Th2U trigonal bipyramid, corners with two equivalent S(1)Pr2U2 trigonal pyramids,  an edgeedge with one S(5)Pr2Th2U square pyramid, edges with two equivalent S(2)Th2U2 tetrahedra, edges with four equivalent S(4)Pr2Th2U trigonal bipyramids, edges with two equivalent S(1)Pr2U2 trigonal pyramids, and  a faceface with one S(5)Pr2Th2U square pyramid. In the fourth S site, S(4) is bonded to one U(1), two equivalent Th(1), and two equivalent Pr(1) atoms to form distorted SPr2Th2U trigonal bipyramids that share  a cornercorner with one S(3)Pr2Th2U square pyramid, corners with five equivalent S(5)Pr2Th2U square pyramids, corners with two equivalent S(2)Th2U2 tetrahedra, corners with four equivalent S(4)Pr2Th2U trigonal bipyramids, corners with two equivalent S(1)Pr2U2 trigonal pyramids, edges with two equivalent S(5)Pr2Th2U square pyramids, edges with four equivalent S(3)Pr2Th2U square pyramids, edges with two equivalent S(2)Th2U2 tetrahedra, and edges with two equivalent S(1)Pr2U2 trigonal pyramids. In the fifth S site, S(5) is bonded to one U(1), two equivalent Th(1), and two equivalent Pr(1) atoms to form SPr2Th2U square pyramids that share corners with four equivalent S(3)Pr2Th2U square pyramids, corners with four equivalent S(2)Th2U2 tetrahedra, corners with five equivalent S(4)Pr2Th2U trigonal bipyramids, corners with four equivalent S(1)Pr2U2 trigonal pyramids,  an edgeedge with one S(3)Pr2Th2U square pyramid, edges with two equivalent S(5)Pr2Th2U square pyramids,  an edgeedge with one S(2)Th2U2 tetrahedra, edges with two equivalent S(4)Pr2Th2U trigonal bipyramids,  an edgeedge with one S(1)Pr2U2 trigonal pyramid, and  a faceface with one S(3)Pr2Th2U square pyramid.