Rh9Te16 crystallizes in the triclinic P-1 space group. There are five inequivalent Rh sites. In the first Rh site, Rh(1) is bonded to one Te(3), one Te(4), two equivalent Te(1), and two equivalent Te(2) atoms to form RhTe6 octahedra that share corners with two equivalent Rh(3)Te6Rh2 octahedra, edges with two equivalent Rh(1)Te6 octahedra, edges with two equivalent Rh(5)Te6 octahedra, and edges with two equivalent Rh(2)Te6Rh octahedra. The corner-sharing octahedral tilt angles are 52°. In the second Rh site, Rh(2) is bonded to one Rh(3), one Te(2), one Te(3), one Te(4), one Te(5), one Te(7), and one Te(8) atom to form distorted RhTe6Rh octahedra that share  a cornercorner with one Rh(2)Te6Rh octahedra, corners with two equivalent Te(2)Rh4 trigonal pyramids, corners with two equivalent Te(7)Rh4 trigonal pyramids, corners with two equivalent Te(8)Rh4 trigonal pyramids, edges with two equivalent Rh(1)Te6 octahedra, edges with two equivalent Rh(4)Te6 octahedra, edges with two equivalent Rh(5)Te6 octahedra, and  a faceface with one Rh(3)Te6Rh2 octahedra. The corner-sharing octahedra are not tilted. In the third Rh site, Rh(3) is bonded to two equivalent Rh(2), two equivalent Te(2), two equivalent Te(7), and two equivalent Te(8) atoms to form distorted RhTe6Rh2 octahedra that share corners with four equivalent Rh(1)Te6 octahedra, corners with four equivalent Rh(4)Te6 octahedra, corners with four equivalent Rh(5)Te6 octahedra, corners with two equivalent Te(2)Rh4 trigonal pyramids, corners with two equivalent Te(7)Rh4 trigonal pyramids, corners with two equivalent Te(8)Rh4 trigonal pyramids, and faces with two equivalent Rh(2)Te6Rh octahedra. The corner-sharing octahedral tilt angles range from 51-54°. In the fourth Rh site, Rh(4) is bonded to one Te(7), one Te(8), two equivalent Te(5), and two equivalent Te(6) atoms to form RhTe6 octahedra that share corners with two equivalent Rh(3)Te6Rh2 octahedra, edges with two equivalent Rh(4)Te6 octahedra, edges with two equivalent Rh(5)Te6 octahedra, and edges with two equivalent Rh(2)Te6Rh octahedra. The corner-sharing octahedral tilt angles range from 51-54°. In the fifth Rh site, Rh(5) is bonded to one Te(1), one Te(3), one Te(4), one Te(6), one Te(7), and one Te(8) atom to form RhTe6 octahedra that share corners with two equivalent Rh(3)Te6Rh2 octahedra, edges with two equivalent Rh(1)Te6 octahedra, edges with two equivalent Rh(4)Te6 octahedra, and edges with two equivalent Rh(2)Te6Rh octahedra. The corner-sharing octahedral tilt angles range from 51-53°. There are eight inequivalent Te sites. In the first Te site, Te(1) is bonded in a distorted T-shaped geometry to one Rh(5) and two equivalent Rh(1) atoms. In the second Te site, Te(2) is bonded to one Rh(2), one Rh(3), and two equivalent Rh(1) atoms to form distorted TeRh4 trigonal pyramids that share  a cornercorner with one Rh(3)Te6Rh2 octahedra, corners with two equivalent Rh(2)Te6Rh octahedra,  a cornercorner with one Te(2)Rh4 trigonal pyramid,  a cornercorner with one Te(7)Rh4 trigonal pyramid,  a cornercorner with one Te(8)Rh4 trigonal pyramid,  an edgeedge with one Te(2)Rh4 trigonal pyramid,  an edgeedge with one Te(7)Rh4 trigonal pyramid, and  an edgeedge with one Te(8)Rh4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 59-121°. In the third Te site, Te(3) is bonded in a distorted T-shaped geometry to one Rh(1), one Rh(2), and one Rh(5) atom. In the fourth Te site, Te(4) is bonded in a distorted T-shaped geometry to one Rh(1), one Rh(2), and one Rh(5) atom. In the fifth Te site, Te(5) is bonded in a distorted T-shaped geometry to one Rh(2) and two equivalent Rh(4) atoms. In the sixth Te site, Te(6) is bonded in a distorted trigonal non-coplanar geometry to one Rh(5) and two equivalent Rh(4) atoms. In the seventh Te site, Te(7) is bonded to one Rh(2), one Rh(3), one Rh(4), and one Rh(5) atom to form distorted TeRh4 trigonal pyramids that share  a cornercorner with one Rh(3)Te6Rh2 octahedra, corners with two equivalent Rh(2)Te6Rh octahedra,  a cornercorner with one Te(2)Rh4 trigonal pyramid,  a cornercorner with one Te(7)Rh4 trigonal pyramid, corners with three equivalent Te(8)Rh4 trigonal pyramids,  an edgeedge with one Te(2)Rh4 trigonal pyramid, and  an edgeedge with one Te(8)Rh4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 58-122°. In the eighth Te site, Te(8) is bonded to one Rh(2), one Rh(3), one Rh(4), and one Rh(5) atom to form distorted TeRh4 trigonal pyramids that share  a cornercorner with one Rh(3)Te6Rh2 octahedra, corners with two equivalent Rh(2)Te6Rh octahedra,  a cornercorner with one Te(2)Rh4 trigonal pyramid,  a cornercorner with one Te(8)Rh4 trigonal pyramid, corners with three equivalent Te(7)Rh4 trigonal pyramids,  an edgeedge with one Te(2)Rh4 trigonal pyramid, and  an edgeedge with one Te(7)Rh4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 58-122°.
Rh9Te16 crystallizes in the triclinic P-1 space group. There are five inequivalent Rh sites. In the first Rh site, Rh(1) is bonded to one Te(3), one Te(4), two equivalent Te(1), and two equivalent Te(2) atoms to form RhTe6 octahedra that share corners with two equivalent Rh(3)Te6Rh2 octahedra, edges with two equivalent Rh(1)Te6 octahedra, edges with two equivalent Rh(5)Te6 octahedra, and edges with two equivalent Rh(2)Te6Rh octahedra. The corner-sharing octahedral tilt angles are 52°. The Rh(1)-Te(3) bond length is 2.69 Å. The Rh(1)-Te(4) bond length is 2.68 Å. There is one shorter (2.66 Å) and one longer (2.67 Å) Rh(1)-Te(1) bond length. There is one shorter (2.67 Å) and one longer (2.69 Å) Rh(1)-Te(2) bond length. In the second Rh site, Rh(2) is bonded to one Rh(3), one Te(2), one Te(3), one Te(4), one Te(5), one Te(7), and one Te(8) atom to form distorted RhTe6Rh octahedra that share  a cornercorner with one Rh(2)Te6Rh octahedra, corners with two equivalent Te(2)Rh4 trigonal pyramids, corners with two equivalent Te(7)Rh4 trigonal pyramids, corners with two equivalent Te(8)Rh4 trigonal pyramids, edges with two equivalent Rh(1)Te6 octahedra, edges with two equivalent Rh(4)Te6 octahedra, edges with two equivalent Rh(5)Te6 octahedra, and  a faceface with one Rh(3)Te6Rh2 octahedra. The corner-sharing octahedra are not tilted. The Rh(2)-Rh(3) bond length is 2.84 Å. The Rh(2)-Te(2) bond length is 2.74 Å. The Rh(2)-Te(3) bond length is 2.67 Å. The Rh(2)-Te(4) bond length is 2.67 Å. The Rh(2)-Te(5) bond length is 2.68 Å. The Rh(2)-Te(7) bond length is 2.69 Å. The Rh(2)-Te(8) bond length is 2.72 Å. In the third Rh site, Rh(3) is bonded to two equivalent Rh(2), two equivalent Te(2), two equivalent Te(7), and two equivalent Te(8) atoms to form distorted RhTe6Rh2 octahedra that share corners with four equivalent Rh(1)Te6 octahedra, corners with four equivalent Rh(4)Te6 octahedra, corners with four equivalent Rh(5)Te6 octahedra, corners with two equivalent Te(2)Rh4 trigonal pyramids, corners with two equivalent Te(7)Rh4 trigonal pyramids, corners with two equivalent Te(8)Rh4 trigonal pyramids, and faces with two equivalent Rh(2)Te6Rh octahedra. The corner-sharing octahedral tilt angles range from 51-54°. Both Rh(3)-Te(2) bond lengths are 2.75 Å. Both Rh(3)-Te(7) bond lengths are 2.75 Å. Both Rh(3)-Te(8) bond lengths are 2.74 Å. In the fourth Rh site, Rh(4) is bonded to one Te(7), one Te(8), two equivalent Te(5), and two equivalent Te(6) atoms to form RhTe6 octahedra that share corners with two equivalent Rh(3)Te6Rh2 octahedra, edges with two equivalent Rh(4)Te6 octahedra, edges with two equivalent Rh(5)Te6 octahedra, and edges with two equivalent Rh(2)Te6Rh octahedra. The corner-sharing octahedral tilt angles range from 51-54°. The Rh(4)-Te(7) bond length is 2.63 Å. The Rh(4)-Te(8) bond length is 2.65 Å. There is one shorter (2.65 Å) and one longer (2.66 Å) Rh(4)-Te(5) bond length. Both Rh(4)-Te(6) bond lengths are 2.71 Å. In the fifth Rh site, Rh(5) is bonded to one Te(1), one Te(3), one Te(4), one Te(6), one Te(7), and one Te(8) atom to form RhTe6 octahedra that share corners with two equivalent Rh(3)Te6Rh2 octahedra, edges with two equivalent Rh(1)Te6 octahedra, edges with two equivalent Rh(4)Te6 octahedra, and edges with two equivalent Rh(2)Te6Rh octahedra. The corner-sharing octahedral tilt angles range from 51-53°. The Rh(5)-Te(1) bond length is 2.65 Å. The Rh(5)-Te(3) bond length is 2.67 Å. The Rh(5)-Te(4) bond length is 2.66 Å. The Rh(5)-Te(6) bond length is 2.71 Å. The Rh(5)-Te(7) bond length is 2.67 Å. The Rh(5)-Te(8) bond length is 2.64 Å. There are eight inequivalent Te sites. In the first Te site, Te(1) is bonded in a distorted T-shaped geometry to one Rh(5) and two equivalent Rh(1) atoms. In the second Te site, Te(2) is bonded to one Rh(2), one Rh(3), and two equivalent Rh(1) atoms to form distorted TeRh4 trigonal pyramids that share  a cornercorner with one Rh(3)Te6Rh2 octahedra, corners with two equivalent Rh(2)Te6Rh octahedra,  a cornercorner with one Te(2)Rh4 trigonal pyramid,  a cornercorner with one Te(7)Rh4 trigonal pyramid,  a cornercorner with one Te(8)Rh4 trigonal pyramid,  an edgeedge with one Te(2)Rh4 trigonal pyramid,  an edgeedge with one Te(7)Rh4 trigonal pyramid, and  an edgeedge with one Te(8)Rh4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 59-121°. In the third Te site, Te(3) is bonded in a distorted T-shaped geometry to one Rh(1), one Rh(2), and one Rh(5) atom. In the fourth Te site, Te(4) is bonded in a distorted T-shaped geometry to one Rh(1), one Rh(2), and one Rh(5) atom. In the fifth Te site, Te(5) is bonded in a distorted T-shaped geometry to one Rh(2) and two equivalent Rh(4) atoms. In the sixth Te site, Te(6) is bonded in a distorted trigonal non-coplanar geometry to one Rh(5) and two equivalent Rh(4) atoms. In the seventh Te site, Te(7) is bonded to one Rh(2), one Rh(3), one Rh(4), and one Rh(5) atom to form distorted TeRh4 trigonal pyramids that share  a cornercorner with one Rh(3)Te6Rh2 octahedra, corners with two equivalent Rh(2)Te6Rh octahedra,  a cornercorner with one Te(2)Rh4 trigonal pyramid,  a cornercorner with one Te(7)Rh4 trigonal pyramid, corners with three equivalent Te(8)Rh4 trigonal pyramids,  an edgeedge with one Te(2)Rh4 trigonal pyramid, and  an edgeedge with one Te(8)Rh4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 58-122°. In the eighth Te site, Te(8) is bonded to one Rh(2), one Rh(3), one Rh(4), and one Rh(5) atom to form distorted TeRh4 trigonal pyramids that share  a cornercorner with one Rh(3)Te6Rh2 octahedra, corners with two equivalent Rh(2)Te6Rh octahedra,  a cornercorner with one Te(2)Rh4 trigonal pyramid,  a cornercorner with one Te(8)Rh4 trigonal pyramid, corners with three equivalent Te(7)Rh4 trigonal pyramids,  an edgeedge with one Te(2)Rh4 trigonal pyramid, and  an edgeedge with one Te(7)Rh4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 58-122°.