Cs3Sm7Te12 crystallizes in the orthorhombic Pmn2_1 space group. There are three inequivalent Cs sites. In the first Cs site, Cs(1) is bonded in a 7-coordinate geometry to one Te(7), two equivalent Te(12), two equivalent Te(4), and two equivalent Te(6) atoms. In the second Cs site, Cs(2) is bonded in a 7-coordinate geometry to one Te(8), two equivalent Te(11), two equivalent Te(3), and two equivalent Te(5) atoms. In the third Cs site, Cs(3) is bonded in a 6-coordinate geometry to one Te(3), one Te(5), two equivalent Te(1), and two equivalent Te(2) atoms. There are seven inequivalent Sm sites. In the first Sm site, Sm(1) is bonded to one Te(1), one Te(11), two equivalent Te(4), and two equivalent Te(9) atoms to form a mixture of edge and corner-sharing SmTe6 octahedra. The corner-sharing octahedral tilt angles are 1°. In the second Sm site, Sm(2) is bonded to one Te(12), one Te(2), two equivalent Te(10), and two equivalent Te(3) atoms to form a mixture of edge and corner-sharing SmTe6 octahedra. The corner-sharing octahedral tilt angles are 1°. In the third Sm site, Sm(3) is bonded to one Te(3), one Te(7), two equivalent Te(12), and two equivalent Te(9) atoms to form a mixture of edge and corner-sharing SmTe6 octahedra. The corner-sharing octahedral tilt angles range from 1-10°. In the fourth Sm site, Sm(4) is bonded to one Te(4), one Te(8), two equivalent Te(10), and two equivalent Te(11) atoms to form a mixture of edge and corner-sharing SmTe6 octahedra. The corner-sharing octahedral tilt angles range from 1-10°. In the fifth Sm site, Sm(5) is bonded to one Te(7), one Te(8), two equivalent Te(5), and two equivalent Te(6) atoms to form a mixture of edge and corner-sharing SmTe6 octahedra. The corner-sharing octahedral tilt angles are 10°. In the sixth Sm site, Sm(6) is bonded to one Te(5), one Te(9), two equivalent Te(1), and two equivalent Te(7) atoms to form edge-sharing SmTe6 octahedra. In the seventh Sm site, Sm(7) is bonded to one Te(10), one Te(6), two equivalent Te(2), and two equivalent Te(8) atoms to form edge-sharing SmTe6 octahedra. There are twelve inequivalent Te sites. In the first Te site, Te(1) is bonded to two equivalent Cs(3), one Sm(1), and two equivalent Sm(6) atoms to form distorted TeCs2Sm3 trigonal bipyramids that share corners with two equivalent Te(3)Cs3Sm3 octahedra, corners with two equivalent Te(2)Cs2Sm3 square pyramids,  a cornercorner with one Te(11)Cs2Sm3 trigonal bipyramid, corners with two equivalent Te(4)Cs2Sm3 trigonal bipyramids, corners with two equivalent Te(7)CsSm4 trigonal bipyramids,  an edgeedge with one Te(2)Cs2Sm3 square pyramid, edges with two equivalent Te(9)Sm5 square pyramids,  an edgeedge with one Te(7)CsSm4 trigonal bipyramid, and edges with two equivalent Te(1)Cs2Sm3 trigonal bipyramids. The corner-sharing octahedral tilt angles are 41°. In the second Te site, Te(2) is bonded to two equivalent Cs(3), one Sm(2), and two equivalent Sm(7) atoms to form distorted TeCs2Sm3 square pyramids that share  a cornercorner with one Te(12)Cs2Sm3 trigonal bipyramid, corners with two equivalent Te(1)Cs2Sm3 trigonal bipyramids, corners with two equivalent Te(6)Cs2Sm3 trigonal bipyramids, corners with two equivalent Te(8)CsSm4 trigonal bipyramids, edges with two equivalent Te(3)Cs3Sm3 octahedra, edges with two equivalent Te(2)Cs2Sm3 square pyramids, edges with two equivalent Te(10)Sm5 square pyramids,  an edgeedge with one Te(1)Cs2Sm3 trigonal bipyramid, and  an edgeedge with one Te(8)CsSm4 trigonal bipyramid. In the third Te site, Te(3) is bonded to one Cs(3), two equivalent Cs(2), one Sm(3), and two equivalent Sm(2) atoms to form distorted TeCs3Sm3 octahedra that share corners with two equivalent Te(10)Sm5 square pyramids, corners with two equivalent Te(9)Sm5 square pyramids,  a cornercorner with one Te(7)CsSm4 trigonal bipyramid, corners with two equivalent Te(1)Cs2Sm3 trigonal bipyramids, corners with two equivalent Te(11)Cs2Sm3 trigonal bipyramids, corners with two equivalent Te(8)CsSm4 trigonal bipyramids, edges with two equivalent Te(3)Cs3Sm3 octahedra,  an edgeedge with one Te(10)Sm5 square pyramid, edges with two equivalent Te(2)Cs2Sm3 square pyramids,  an edgeedge with one Te(11)Cs2Sm3 trigonal bipyramid, and edges with two equivalent Te(12)Cs2Sm3 trigonal bipyramids. In the fourth Te site, Te(4) is bonded to two equivalent Cs(1), one Sm(4), and two equivalent Sm(1) atoms to form distorted TeCs2Sm3 trigonal bipyramids that share corners with two equivalent Te(10)Sm5 square pyramids, corners with two equivalent Te(9)Sm5 square pyramids,  a cornercorner with one Te(8)CsSm4 trigonal bipyramid, corners with two equivalent Te(1)Cs2Sm3 trigonal bipyramids, corners with two equivalent Te(12)Cs2Sm3 trigonal bipyramids, corners with two equivalent Te(6)Cs2Sm3 trigonal bipyramids, corners with two equivalent Te(7)CsSm4 trigonal bipyramids,  an edgeedge with one Te(9)Sm5 square pyramid,  an edgeedge with one Te(12)Cs2Sm3 trigonal bipyramid,  an edgeedge with one Te(6)Cs2Sm3 trigonal bipyramid, edges with two equivalent Te(11)Cs2Sm3 trigonal bipyramids, and edges with two equivalent Te(4)Cs2Sm3 trigonal bipyramids. In the fifth Te site, Te(5) is bonded in a 6-coordinate geometry to one Cs(3), two equivalent Cs(2), one Sm(6), and two equivalent Sm(5) atoms. In the sixth Te site, Te(6) is bonded to two equivalent Cs(1), one Sm(7), and two equivalent Sm(5) atoms to form distorted TeCs2Sm3 trigonal bipyramids that share  a cornercorner with one Te(10)Sm5 square pyramid, corners with two equivalent Te(2)Cs2Sm3 square pyramids, corners with two equivalent Te(12)Cs2Sm3 trigonal bipyramids, corners with two equivalent Te(4)Cs2Sm3 trigonal bipyramids,  an edgeedge with one Te(12)Cs2Sm3 trigonal bipyramid,  an edgeedge with one Te(4)Cs2Sm3 trigonal bipyramid, edges with two equivalent Te(6)Cs2Sm3 trigonal bipyramids, edges with two equivalent Te(7)CsSm4 trigonal bipyramids, and edges with two equivalent Te(8)CsSm4 trigonal bipyramids. In the seventh Te site, Te(7) is bonded to one Cs(1), one Sm(3), one Sm(5), and two equivalent Sm(6) atoms to form distorted TeCsSm4 trigonal bipyramids that share  a cornercorner with one Te(3)Cs3Sm3 octahedra,  a cornercorner with one Te(8)CsSm4 trigonal bipyramid, corners with two equivalent Te(1)Cs2Sm3 trigonal bipyramids, corners with two equivalent Te(4)Cs2Sm3 trigonal bipyramids, corners with two equivalent Te(7)CsSm4 trigonal bipyramids, edges with two equivalent Te(9)Sm5 square pyramids,  an edgeedge with one Te(1)Cs2Sm3 trigonal bipyramid, edges with two equivalent Te(12)Cs2Sm3 trigonal bipyramids, and edges with two equivalent Te(6)Cs2Sm3 trigonal bipyramids. The corner-sharing octahedral tilt angles are 10°. In the eighth Te site, Te(8) is bonded to one Cs(2), one Sm(4), one Sm(5), and two equivalent Sm(7) atoms to form distorted TeCsSm4 trigonal bipyramids that share corners with two equivalent Te(3)Cs3Sm3 octahedra, corners with two equivalent Te(2)Cs2Sm3 square pyramids,  a cornercorner with one Te(4)Cs2Sm3 trigonal bipyramid,  a cornercorner with one Te(7)CsSm4 trigonal bipyramid, corners with two equivalent Te(8)CsSm4 trigonal bipyramids,  an edgeedge with one Te(2)Cs2Sm3 square pyramid, edges with two equivalent Te(10)Sm5 square pyramids, edges with two equivalent Te(11)Cs2Sm3 trigonal bipyramids, and edges with two equivalent Te(6)Cs2Sm3 trigonal bipyramids. The corner-sharing octahedral tilt angles are 36°. In the ninth Te site, Te(9) is bonded to one Sm(6), two equivalent Sm(1), and two equivalent Sm(3) atoms to form TeSm5 square pyramids that share corners with two equivalent Te(3)Cs3Sm3 octahedra, corners with two equivalent Te(11)Cs2Sm3 trigonal bipyramids, corners with two equivalent Te(12)Cs2Sm3 trigonal bipyramids, corners with two equivalent Te(4)Cs2Sm3 trigonal bipyramids, edges with two equivalent Te(9)Sm5 square pyramids,  an edgeedge with one Te(12)Cs2Sm3 trigonal bipyramid,  an edgeedge with one Te(4)Cs2Sm3 trigonal bipyramid, edges with two equivalent Te(1)Cs2Sm3 trigonal bipyramids, and edges with two equivalent Te(7)CsSm4 trigonal bipyramids. The corner-sharing octahedral tilt angles are 80°. In the tenth Te site, Te(10) is bonded to one Sm(7), two equivalent Sm(2), and two equivalent Sm(4) atoms to form TeSm5 square pyramids that share corners with two equivalent Te(3)Cs3Sm3 octahedra,  a cornercorner with one Te(6)Cs2Sm3 trigonal bipyramid, corners with two equivalent Te(11)Cs2Sm3 trigonal bipyramids, corners with two equivalent Te(12)Cs2Sm3 trigonal bipyramids, corners with two equivalent Te(4)Cs2Sm3 trigonal bipyramids,  an edgeedge with one Te(3)Cs3Sm3 octahedra, edges with two equivalent Te(2)Cs2Sm3 square pyramids, edges with two equivalent Te(10)Sm5 square pyramids,  an edgeedge with one Te(11)Cs2Sm3 trigonal bipyramid, and edges with two equivalent Te(8)CsSm4 trigonal bipyramids. The corner-sharing octahedral tilt angles are 5°. In the eleventh Te site, Te(11) is bonded to two equivalent Cs(2), one Sm(1), and two equivalent Sm(4) atoms to form distorted TeCs2Sm3 trigonal bipyramids that share corners with two equivalent Te(3)Cs3Sm3 octahedra, corners with two equivalent Te(10)Sm5 square pyramids, corners with two equivalent Te(9)Sm5 square pyramids,  a cornercorner with one Te(1)Cs2Sm3 trigonal bipyramid,  an edgeedge with one Te(3)Cs3Sm3 octahedra,  an edgeedge with one Te(10)Sm5 square pyramid, edges with two equivalent Te(11)Cs2Sm3 trigonal bipyramids, edges with two equivalent Te(4)Cs2Sm3 trigonal bipyramids, and edges with two equivalent Te(8)CsSm4 trigonal bipyramids. The corner-sharing octahedral tilt angles are 54°. In the twelfth Te site, Te(12) is bonded to two equivalent Cs(1), one Sm(2), and two equivalent Sm(3) atoms to form distorted TeCs2Sm3 trigonal bipyramids that share  a cornercorner with one Te(2)Cs2Sm3 square pyramid, corners with two equivalent Te(10)Sm5 square pyramids, corners with two equivalent Te(9)Sm5 square pyramids, corners with two equivalent Te(4)Cs2Sm3 trigonal bipyramids, corners with two equivalent Te(6)Cs2Sm3 trigonal bipyramids, edges with two equivalent Te(3)Cs3Sm3 octahedra,  an edgeedge with one Te(9)Sm5 square pyramid,  an edgeedge with one Te(4)Cs2Sm3 trigonal bipyramid,  an edgeedge with one Te(6)Cs2Sm3 trigonal bipyramid, edges with two equivalent Te(12)Cs2Sm3 trigonal bipyramids, and edges with two equivalent Te(7)CsSm4 trigonal bipyramids.
Cs3Sm7Te12 crystallizes in the orthorhombic Pmn2_1 space group. There are three inequivalent Cs sites. In the first Cs site, Cs(1) is bonded in a 7-coordinate geometry to one Te(7), two equivalent Te(12), two equivalent Te(4), and two equivalent Te(6) atoms. The Cs(1)-Te(7) bond length is 4.00 Å. Both Cs(1)-Te(12) bond lengths are 3.93 Å. Both Cs(1)-Te(4) bond lengths are 3.94 Å. Both Cs(1)-Te(6) bond lengths are 3.97 Å. In the second Cs site, Cs(2) is bonded in a 7-coordinate geometry to one Te(8), two equivalent Te(11), two equivalent Te(3), and two equivalent Te(5) atoms. The Cs(2)-Te(8) bond length is 3.91 Å. Both Cs(2)-Te(11) bond lengths are 3.79 Å. Both Cs(2)-Te(3) bond lengths are 3.95 Å. Both Cs(2)-Te(5) bond lengths are 4.05 Å. In the third Cs site, Cs(3) is bonded in a 6-coordinate geometry to one Te(3), one Te(5), two equivalent Te(1), and two equivalent Te(2) atoms. The Cs(3)-Te(3) bond length is 4.28 Å. The Cs(3)-Te(5) bond length is 3.94 Å. Both Cs(3)-Te(1) bond lengths are 3.85 Å. Both Cs(3)-Te(2) bond lengths are 3.74 Å. There are seven inequivalent Sm sites. In the first Sm site, Sm(1) is bonded to one Te(1), one Te(11), two equivalent Te(4), and two equivalent Te(9) atoms to form a mixture of edge and corner-sharing SmTe6 octahedra. The corner-sharing octahedral tilt angles are 1°. The Sm(1)-Te(1) bond length is 3.10 Å. The Sm(1)-Te(11) bond length is 3.09 Å. Both Sm(1)-Te(4) bond lengths are 3.10 Å. Both Sm(1)-Te(9) bond lengths are 3.28 Å. In the second Sm site, Sm(2) is bonded to one Te(12), one Te(2), two equivalent Te(10), and two equivalent Te(3) atoms to form a mixture of edge and corner-sharing SmTe6 octahedra. The corner-sharing octahedral tilt angles are 1°. The Sm(2)-Te(12) bond length is 3.09 Å. The Sm(2)-Te(2) bond length is 3.11 Å. Both Sm(2)-Te(10) bond lengths are 3.25 Å. Both Sm(2)-Te(3) bond lengths are 3.13 Å. In the third Sm site, Sm(3) is bonded to one Te(3), one Te(7), two equivalent Te(12), and two equivalent Te(9) atoms to form a mixture of edge and corner-sharing SmTe6 octahedra. The corner-sharing octahedral tilt angles range from 1-10°. The Sm(3)-Te(3) bond length is 3.19 Å. The Sm(3)-Te(7) bond length is 3.13 Å. Both Sm(3)-Te(12) bond lengths are 3.08 Å. Both Sm(3)-Te(9) bond lengths are 3.24 Å. In the fourth Sm site, Sm(4) is bonded to one Te(4), one Te(8), two equivalent Te(10), and two equivalent Te(11) atoms to form a mixture of edge and corner-sharing SmTe6 octahedra. The corner-sharing octahedral tilt angles range from 1-10°. The Sm(4)-Te(4) bond length is 3.13 Å. The Sm(4)-Te(8) bond length is 3.14 Å. Both Sm(4)-Te(10) bond lengths are 3.23 Å. Both Sm(4)-Te(11) bond lengths are 3.08 Å. In the fifth Sm site, Sm(5) is bonded to one Te(7), one Te(8), two equivalent Te(5), and two equivalent Te(6) atoms to form a mixture of edge and corner-sharing SmTe6 octahedra. The corner-sharing octahedral tilt angles are 10°. The Sm(5)-Te(7) bond length is 3.11 Å. The Sm(5)-Te(8) bond length is 3.11 Å. Both Sm(5)-Te(5) bond lengths are 3.19 Å. Both Sm(5)-Te(6) bond lengths are 3.15 Å. In the sixth Sm site, Sm(6) is bonded to one Te(5), one Te(9), two equivalent Te(1), and two equivalent Te(7) atoms to form edge-sharing SmTe6 octahedra. The Sm(6)-Te(5) bond length is 3.11 Å. The Sm(6)-Te(9) bond length is 3.26 Å. Both Sm(6)-Te(1) bond lengths are 3.14 Å. Both Sm(6)-Te(7) bond lengths are 3.15 Å. In the seventh Sm site, Sm(7) is bonded to one Te(10), one Te(6), two equivalent Te(2), and two equivalent Te(8) atoms to form edge-sharing SmTe6 octahedra. The Sm(7)-Te(10) bond length is 3.29 Å. The Sm(7)-Te(6) bond length is 3.08 Å. Both Sm(7)-Te(2) bond lengths are 3.12 Å. Both Sm(7)-Te(8) bond lengths are 3.15 Å. There are twelve inequivalent Te sites. In the first Te site, Te(1) is bonded to two equivalent Cs(3), one Sm(1), and two equivalent Sm(6) atoms to form distorted TeCs2Sm3 trigonal bipyramids that share corners with two equivalent Te(3)Cs3Sm3 octahedra, corners with two equivalent Te(2)Cs2Sm3 square pyramids,  a cornercorner with one Te(11)Cs2Sm3 trigonal bipyramid, corners with two equivalent Te(4)Cs2Sm3 trigonal bipyramids, corners with two equivalent Te(7)CsSm4 trigonal bipyramids,  an edgeedge with one Te(2)Cs2Sm3 square pyramid, edges with two equivalent Te(9)Sm5 square pyramids,  an edgeedge with one Te(7)CsSm4 trigonal bipyramid, and edges with two equivalent Te(1)Cs2Sm3 trigonal bipyramids. The corner-sharing octahedral tilt angles are 41°. In the second Te site, Te(2) is bonded to two equivalent Cs(3), one Sm(2), and two equivalent Sm(7) atoms to form distorted TeCs2Sm3 square pyramids that share  a cornercorner with one Te(12)Cs2Sm3 trigonal bipyramid, corners with two equivalent Te(1)Cs2Sm3 trigonal bipyramids, corners with two equivalent Te(6)Cs2Sm3 trigonal bipyramids, corners with two equivalent Te(8)CsSm4 trigonal bipyramids, edges with two equivalent Te(3)Cs3Sm3 octahedra, edges with two equivalent Te(2)Cs2Sm3 square pyramids, edges with two equivalent Te(10)Sm5 square pyramids,  an edgeedge with one Te(1)Cs2Sm3 trigonal bipyramid, and  an edgeedge with one Te(8)CsSm4 trigonal bipyramid. In the third Te site, Te(3) is bonded to one Cs(3), two equivalent Cs(2), one Sm(3), and two equivalent Sm(2) atoms to form distorted TeCs3Sm3 octahedra that share corners with two equivalent Te(10)Sm5 square pyramids, corners with two equivalent Te(9)Sm5 square pyramids,  a cornercorner with one Te(7)CsSm4 trigonal bipyramid, corners with two equivalent Te(1)Cs2Sm3 trigonal bipyramids, corners with two equivalent Te(11)Cs2Sm3 trigonal bipyramids, corners with two equivalent Te(8)CsSm4 trigonal bipyramids, edges with two equivalent Te(3)Cs3Sm3 octahedra,  an edgeedge with one Te(10)Sm5 square pyramid, edges with two equivalent Te(2)Cs2Sm3 square pyramids,  an edgeedge with one Te(11)Cs2Sm3 trigonal bipyramid, and edges with two equivalent Te(12)Cs2Sm3 trigonal bipyramids. In the fourth Te site, Te(4) is bonded to two equivalent Cs(1), one Sm(4), and two equivalent Sm(1) atoms to form distorted TeCs2Sm3 trigonal bipyramids that share corners with two equivalent Te(10)Sm5 square pyramids, corners with two equivalent Te(9)Sm5 square pyramids,  a cornercorner with one Te(8)CsSm4 trigonal bipyramid, corners with two equivalent Te(1)Cs2Sm3 trigonal bipyramids, corners with two equivalent Te(12)Cs2Sm3 trigonal bipyramids, corners with two equivalent Te(6)Cs2Sm3 trigonal bipyramids, corners with two equivalent Te(7)CsSm4 trigonal bipyramids,  an edgeedge with one Te(9)Sm5 square pyramid,  an edgeedge with one Te(12)Cs2Sm3 trigonal bipyramid,  an edgeedge with one Te(6)Cs2Sm3 trigonal bipyramid, edges with two equivalent Te(11)Cs2Sm3 trigonal bipyramids, and edges with two equivalent Te(4)Cs2Sm3 trigonal bipyramids. In the fifth Te site, Te(5) is bonded in a 6-coordinate geometry to one Cs(3), two equivalent Cs(2), one Sm(6), and two equivalent Sm(5) atoms. In the sixth Te site, Te(6) is bonded to two equivalent Cs(1), one Sm(7), and two equivalent Sm(5) atoms to form distorted TeCs2Sm3 trigonal bipyramids that share  a cornercorner with one Te(10)Sm5 square pyramid, corners with two equivalent Te(2)Cs2Sm3 square pyramids, corners with two equivalent Te(12)Cs2Sm3 trigonal bipyramids, corners with two equivalent Te(4)Cs2Sm3 trigonal bipyramids,  an edgeedge with one Te(12)Cs2Sm3 trigonal bipyramid,  an edgeedge with one Te(4)Cs2Sm3 trigonal bipyramid, edges with two equivalent Te(6)Cs2Sm3 trigonal bipyramids, edges with two equivalent Te(7)CsSm4 trigonal bipyramids, and edges with two equivalent Te(8)CsSm4 trigonal bipyramids. In the seventh Te site, Te(7) is bonded to one Cs(1), one Sm(3), one Sm(5), and two equivalent Sm(6) atoms to form distorted TeCsSm4 trigonal bipyramids that share  a cornercorner with one Te(3)Cs3Sm3 octahedra,  a cornercorner with one Te(8)CsSm4 trigonal bipyramid, corners with two equivalent Te(1)Cs2Sm3 trigonal bipyramids, corners with two equivalent Te(4)Cs2Sm3 trigonal bipyramids, corners with two equivalent Te(7)CsSm4 trigonal bipyramids, edges with two equivalent Te(9)Sm5 square pyramids,  an edgeedge with one Te(1)Cs2Sm3 trigonal bipyramid, edges with two equivalent Te(12)Cs2Sm3 trigonal bipyramids, and edges with two equivalent Te(6)Cs2Sm3 trigonal bipyramids. The corner-sharing octahedral tilt angles are 10°. In the eighth Te site, Te(8) is bonded to one Cs(2), one Sm(4), one Sm(5), and two equivalent Sm(7) atoms to form distorted TeCsSm4 trigonal bipyramids that share corners with two equivalent Te(3)Cs3Sm3 octahedra, corners with two equivalent Te(2)Cs2Sm3 square pyramids,  a cornercorner with one Te(4)Cs2Sm3 trigonal bipyramid,  a cornercorner with one Te(7)CsSm4 trigonal bipyramid, corners with two equivalent Te(8)CsSm4 trigonal bipyramids,  an edgeedge with one Te(2)Cs2Sm3 square pyramid, edges with two equivalent Te(10)Sm5 square pyramids, edges with two equivalent Te(11)Cs2Sm3 trigonal bipyramids, and edges with two equivalent Te(6)Cs2Sm3 trigonal bipyramids. The corner-sharing octahedral tilt angles are 36°. In the ninth Te site, Te(9) is bonded to one Sm(6), two equivalent Sm(1), and two equivalent Sm(3) atoms to form TeSm5 square pyramids that share corners with two equivalent Te(3)Cs3Sm3 octahedra, corners with two equivalent Te(11)Cs2Sm3 trigonal bipyramids, corners with two equivalent Te(12)Cs2Sm3 trigonal bipyramids, corners with two equivalent Te(4)Cs2Sm3 trigonal bipyramids, edges with two equivalent Te(9)Sm5 square pyramids,  an edgeedge with one Te(12)Cs2Sm3 trigonal bipyramid,  an edgeedge with one Te(4)Cs2Sm3 trigonal bipyramid, edges with two equivalent Te(1)Cs2Sm3 trigonal bipyramids, and edges with two equivalent Te(7)CsSm4 trigonal bipyramids. The corner-sharing octahedral tilt angles are 80°. In the tenth Te site, Te(10) is bonded to one Sm(7), two equivalent Sm(2), and two equivalent Sm(4) atoms to form TeSm5 square pyramids that share corners with two equivalent Te(3)Cs3Sm3 octahedra,  a cornercorner with one Te(6)Cs2Sm3 trigonal bipyramid, corners with two equivalent Te(11)Cs2Sm3 trigonal bipyramids, corners with two equivalent Te(12)Cs2Sm3 trigonal bipyramids, corners with two equivalent Te(4)Cs2Sm3 trigonal bipyramids,  an edgeedge with one Te(3)Cs3Sm3 octahedra, edges with two equivalent Te(2)Cs2Sm3 square pyramids, edges with two equivalent Te(10)Sm5 square pyramids,  an edgeedge with one Te(11)Cs2Sm3 trigonal bipyramid, and edges with two equivalent Te(8)CsSm4 trigonal bipyramids. The corner-sharing octahedral tilt angles are 5°. In the eleventh Te site, Te(11) is bonded to two equivalent Cs(2), one Sm(1), and two equivalent Sm(4) atoms to form distorted TeCs2Sm3 trigonal bipyramids that share corners with two equivalent Te(3)Cs3Sm3 octahedra, corners with two equivalent Te(10)Sm5 square pyramids, corners with two equivalent Te(9)Sm5 square pyramids,  a cornercorner with one Te(1)Cs2Sm3 trigonal bipyramid,  an edgeedge with one Te(3)Cs3Sm3 octahedra,  an edgeedge with one Te(10)Sm5 square pyramid, edges with two equivalent Te(11)Cs2Sm3 trigonal bipyramids, edges with two equivalent Te(4)Cs2Sm3 trigonal bipyramids, and edges with two equivalent Te(8)CsSm4 trigonal bipyramids. The corner-sharing octahedral tilt angles are 54°. In the twelfth Te site, Te(12) is bonded to two equivalent Cs(1), one Sm(2), and two equivalent Sm(3) atoms to form distorted TeCs2Sm3 trigonal bipyramids that share  a cornercorner with one Te(2)Cs2Sm3 square pyramid, corners with two equivalent Te(10)Sm5 square pyramids, corners with two equivalent Te(9)Sm5 square pyramids, corners with two equivalent Te(4)Cs2Sm3 trigonal bipyramids, corners with two equivalent Te(6)Cs2Sm3 trigonal bipyramids, edges with two equivalent Te(3)Cs3Sm3 octahedra,  an edgeedge with one Te(9)Sm5 square pyramid,  an edgeedge with one Te(4)Cs2Sm3 trigonal bipyramid,  an edgeedge with one Te(6)Cs2Sm3 trigonal bipyramid, edges with two equivalent Te(12)Cs2Sm3 trigonal bipyramids, and edges with two equivalent Te(7)CsSm4 trigonal bipyramids.