Rh15Te16 crystallizes in the monoclinic P2/m space group. There are eight inequivalent Rh sites. In the first Rh site, Rh(1) is bonded to two equivalent Te(1), two equivalent Te(2), and two equivalent Te(5) atoms to form distorted RhTe6 octahedra that share corners with two equivalent Rh(5)Te6 octahedra, corners with two equivalent Rh(7)Te6 octahedra, corners with two equivalent Rh(8)Te6Rh2 octahedra, corners with four equivalent Rh(6)Te6 octahedra, edges with two equivalent Rh(1)Te6 octahedra, edges with two equivalent Rh(4)Te6 octahedra, and faces with two equivalent Rh(6)Te6 octahedra. The corner-sharing octahedral tilt angles range from 50-52°. In the second Rh site, Rh(2) is bonded in a 6-coordinate geometry to one Rh(8), one Te(2), one Te(6), two equivalent Te(1), and two equivalent Te(3) atoms. In the third Rh site, Rh(3) is bonded to two equivalent Te(3), two equivalent Te(4), and two equivalent Te(6) atoms to form distorted RhTe6 octahedra that share corners with two equivalent Rh(5)Te6 octahedra, corners with two equivalent Rh(7)Te6 octahedra, corners with two equivalent Rh(8)Te6Rh2 octahedra, corners with four equivalent Rh(6)Te6 octahedra, edges with two equivalent Rh(3)Te6 octahedra, edges with two equivalent Rh(4)Te6 octahedra, and faces with two equivalent Rh(6)Te6 octahedra. The corner-sharing octahedral tilt angles range from 49-52°. In the fourth Rh site, Rh(4) is bonded to one Te(4), one Te(5), two equivalent Te(1), and two equivalent Te(3) atoms to form distorted RhTe6 octahedra that share corners with two equivalent Rh(5)Te6 octahedra, corners with two equivalent Rh(8)Te6Rh2 octahedra, corners with eight equivalent Rh(6)Te6 octahedra, edges with two equivalent Rh(1)Te6 octahedra, edges with two equivalent Rh(3)Te6 octahedra, and  a faceface with one Rh(7)Te6 octahedra. The corner-sharing octahedral tilt angles range from 48-53°. In the fifth Rh site, Rh(5) is bonded to two equivalent Te(6) and four equivalent Te(1) atoms to form a mixture of distorted corner and edge-sharing RhTe6 octahedra. The corner-sharing octahedral tilt angles range from 51-52°. In the sixth Rh site, Rh(6) is bonded to one Te(1), one Te(2), one Te(3), one Te(4), one Te(5), and one Te(6) atom to form distorted RhTe6 octahedra that share corners with two equivalent Rh(1)Te6 octahedra, corners with two equivalent Rh(3)Te6 octahedra, corners with four equivalent Rh(4)Te6 octahedra,  an edgeedge with one Rh(5)Te6 octahedra,  an edgeedge with one Rh(7)Te6 octahedra,  an edgeedge with one Rh(8)Te6Rh2 octahedra, edges with two equivalent Rh(6)Te6 octahedra,  a faceface with one Rh(1)Te6 octahedra, and  a faceface with one Rh(3)Te6 octahedra. The corner-sharing octahedral tilt angles range from 48-53°. In the seventh Rh site, Rh(7) is bonded to two equivalent Te(5) and four equivalent Te(3) atoms to form distorted RhTe6 octahedra that share corners with four equivalent Rh(1)Te6 octahedra, corners with four equivalent Rh(3)Te6 octahedra, edges with two equivalent Rh(8)Te6Rh2 octahedra, edges with four equivalent Rh(6)Te6 octahedra, and faces with two equivalent Rh(4)Te6 octahedra. The corner-sharing octahedral tilt angles are 52°. In the eighth Rh site, Rh(8) is bonded to two equivalent Rh(2), two equivalent Te(2), and four equivalent Te(3) atoms to form a mixture of distorted corner and edge-sharing RhTe6Rh2 octahedra. The corner-sharing octahedral tilt angles are 50°. There are six inequivalent Te sites. In the first Te site, Te(1) is bonded in a 5-coordinate geometry to one Rh(1), one Rh(2), one Rh(4), one Rh(5), and one Rh(6) atom. In the second Te site, Te(2) is bonded in a 6-coordinate geometry to one Rh(2), one Rh(8), two equivalent Rh(1), and two equivalent Rh(6) atoms. In the third Te site, Te(3) is bonded in a 6-coordinate geometry to one Rh(2), one Rh(3), one Rh(4), one Rh(6), one Rh(7), and one Rh(8) atom. In the fourth Te site, Te(4) is bonded to one Rh(4), two equivalent Rh(3), and two equivalent Rh(6) atoms to form distorted edge-sharing TeRh5 square pyramids. In the fifth Te site, Te(5) is bonded in a 6-coordinate geometry to one Rh(4), one Rh(7), two equivalent Rh(1), and two equivalent Rh(6) atoms. In the sixth Te site, Te(6) is bonded in a 6-coordinate geometry to one Rh(2), one Rh(5), two equivalent Rh(3), and two equivalent Rh(6) atoms.
Rh15Te16 crystallizes in the monoclinic P2/m space group. There are eight inequivalent Rh sites. In the first Rh site, Rh(1) is bonded to two equivalent Te(1), two equivalent Te(2), and two equivalent Te(5) atoms to form distorted RhTe6 octahedra that share corners with two equivalent Rh(5)Te6 octahedra, corners with two equivalent Rh(7)Te6 octahedra, corners with two equivalent Rh(8)Te6Rh2 octahedra, corners with four equivalent Rh(6)Te6 octahedra, edges with two equivalent Rh(1)Te6 octahedra, edges with two equivalent Rh(4)Te6 octahedra, and faces with two equivalent Rh(6)Te6 octahedra. The corner-sharing octahedral tilt angles range from 50-52°. Both Rh(1)-Te(1) bond lengths are 2.69 Å. Both Rh(1)-Te(2) bond lengths are 2.68 Å. Both Rh(1)-Te(5) bond lengths are 2.79 Å. In the second Rh site, Rh(2) is bonded in a 6-coordinate geometry to one Rh(8), one Te(2), one Te(6), two equivalent Te(1), and two equivalent Te(3) atoms. The Rh(2)-Rh(8) bond length is 2.81 Å. The Rh(2)-Te(2) bond length is 2.67 Å. The Rh(2)-Te(6) bond length is 2.83 Å. Both Rh(2)-Te(1) bond lengths are 2.65 Å. Both Rh(2)-Te(3) bond lengths are 2.77 Å. In the third Rh site, Rh(3) is bonded to two equivalent Te(3), two equivalent Te(4), and two equivalent Te(6) atoms to form distorted RhTe6 octahedra that share corners with two equivalent Rh(5)Te6 octahedra, corners with two equivalent Rh(7)Te6 octahedra, corners with two equivalent Rh(8)Te6Rh2 octahedra, corners with four equivalent Rh(6)Te6 octahedra, edges with two equivalent Rh(3)Te6 octahedra, edges with two equivalent Rh(4)Te6 octahedra, and faces with two equivalent Rh(6)Te6 octahedra. The corner-sharing octahedral tilt angles range from 49-52°. Both Rh(3)-Te(3) bond lengths are 2.72 Å. Both Rh(3)-Te(4) bond lengths are 2.65 Å. Both Rh(3)-Te(6) bond lengths are 2.80 Å. In the fourth Rh site, Rh(4) is bonded to one Te(4), one Te(5), two equivalent Te(1), and two equivalent Te(3) atoms to form distorted RhTe6 octahedra that share corners with two equivalent Rh(5)Te6 octahedra, corners with two equivalent Rh(8)Te6Rh2 octahedra, corners with eight equivalent Rh(6)Te6 octahedra, edges with two equivalent Rh(1)Te6 octahedra, edges with two equivalent Rh(3)Te6 octahedra, and  a faceface with one Rh(7)Te6 octahedra. The corner-sharing octahedral tilt angles range from 48-53°. The Rh(4)-Te(4) bond length is 2.63 Å. The Rh(4)-Te(5) bond length is 2.77 Å. Both Rh(4)-Te(1) bond lengths are 2.65 Å. Both Rh(4)-Te(3) bond lengths are 2.77 Å. In the fifth Rh site, Rh(5) is bonded to two equivalent Te(6) and four equivalent Te(1) atoms to form a mixture of distorted corner and edge-sharing RhTe6 octahedra. The corner-sharing octahedral tilt angles range from 51-52°. Both Rh(5)-Te(6) bond lengths are 2.70 Å. All Rh(5)-Te(1) bond lengths are 2.73 Å. In the sixth Rh site, Rh(6) is bonded to one Te(1), one Te(2), one Te(3), one Te(4), one Te(5), and one Te(6) atom to form distorted RhTe6 octahedra that share corners with two equivalent Rh(1)Te6 octahedra, corners with two equivalent Rh(3)Te6 octahedra, corners with four equivalent Rh(4)Te6 octahedra,  an edgeedge with one Rh(5)Te6 octahedra,  an edgeedge with one Rh(7)Te6 octahedra,  an edgeedge with one Rh(8)Te6Rh2 octahedra, edges with two equivalent Rh(6)Te6 octahedra,  a faceface with one Rh(1)Te6 octahedra, and  a faceface with one Rh(3)Te6 octahedra. The corner-sharing octahedral tilt angles range from 48-53°. The Rh(6)-Te(1) bond length is 2.67 Å. The Rh(6)-Te(2) bond length is 2.72 Å. The Rh(6)-Te(3) bond length is 2.81 Å. The Rh(6)-Te(4) bond length is 2.69 Å. The Rh(6)-Te(5) bond length is 2.75 Å. The Rh(6)-Te(6) bond length is 2.73 Å. In the seventh Rh site, Rh(7) is bonded to two equivalent Te(5) and four equivalent Te(3) atoms to form distorted RhTe6 octahedra that share corners with four equivalent Rh(1)Te6 octahedra, corners with four equivalent Rh(3)Te6 octahedra, edges with two equivalent Rh(8)Te6Rh2 octahedra, edges with four equivalent Rh(6)Te6 octahedra, and faces with two equivalent Rh(4)Te6 octahedra. The corner-sharing octahedral tilt angles are 52°. Both Rh(7)-Te(5) bond lengths are 2.74 Å. All Rh(7)-Te(3) bond lengths are 2.70 Å. In the eighth Rh site, Rh(8) is bonded to two equivalent Rh(2), two equivalent Te(2), and four equivalent Te(3) atoms to form a mixture of distorted corner and edge-sharing RhTe6Rh2 octahedra. The corner-sharing octahedral tilt angles are 50°. Both Rh(8)-Te(2) bond lengths are 2.71 Å. All Rh(8)-Te(3) bond lengths are 2.75 Å. There are six inequivalent Te sites. In the first Te site, Te(1) is bonded in a 5-coordinate geometry to one Rh(1), one Rh(2), one Rh(4), one Rh(5), and one Rh(6) atom. In the second Te site, Te(2) is bonded in a 6-coordinate geometry to one Rh(2), one Rh(8), two equivalent Rh(1), and two equivalent Rh(6) atoms. In the third Te site, Te(3) is bonded in a 6-coordinate geometry to one Rh(2), one Rh(3), one Rh(4), one Rh(6), one Rh(7), and one Rh(8) atom. In the fourth Te site, Te(4) is bonded to one Rh(4), two equivalent Rh(3), and two equivalent Rh(6) atoms to form distorted edge-sharing TeRh5 square pyramids. In the fifth Te site, Te(5) is bonded in a 6-coordinate geometry to one Rh(4), one Rh(7), two equivalent Rh(1), and two equivalent Rh(6) atoms. In the sixth Te site, Te(6) is bonded in a 6-coordinate geometry to one Rh(2), one Rh(5), two equivalent Rh(3), and two equivalent Rh(6) atoms.