Co19Te34 crystallizes in the triclinic P-1 space group. There are ten inequivalent Co sites. In the first Co site, Co(1) is bonded to one Te(10), one Te(12), one Te(2), one Te(4), one Te(5), and one Te(7) atom to form a mixture of corner and edge-sharing CoTe6 octahedra. The corner-sharing octahedral tilt angles range from 51-52°. In the second Co site, Co(2) is bonded to one Te(10), one Te(2), one Te(6), one Te(8), and two equivalent Te(4) atoms to form a mixture of corner and edge-sharing CoTe6 octahedra. The corner-sharing octahedral tilt angles are 51°. In the third Co site, Co(3) is bonded to one Te(2), one Te(3), one Te(5), one Te(8), and two equivalent Te(1) atoms to form a mixture of corner and edge-sharing CoTe6 octahedra. The corner-sharing octahedral tilt angles are 51°. In the fourth Co site, Co(4) is bonded to one Te(1), one Te(12), one Te(14), one Te(3), one Te(5), and one Te(9) atom to form a mixture of distorted face and edge-sharing CoTe6 octahedra. In the fifth Co site, Co(5) is bonded to one Te(11), one Te(14), one Te(16), one Te(3), one Te(6), and one Te(8) atom to form a mixture of corner and edge-sharing CoTe6 octahedra. The corner-sharing octahedral tilt angles are 51°. In the sixth Co site, Co(6) is bonded to one Te(10), one Te(13), one Te(16), one Te(17), one Te(6), and one Te(7) atom to form a mixture of distorted face and edge-sharing CoTe6 octahedra. In the seventh Co site, Co(7) is bonded to one Te(12), one Te(17), one Te(7), one Te(9), and two equivalent Te(15) atoms to form a mixture of corner and edge-sharing CoTe6 octahedra. The corner-sharing octahedral tilt angles are 51°. In the eighth Co site, Co(8) is bonded to one Te(11), one Te(13), one Te(14), one Te(15), one Te(17), and one Te(9) atom to form a mixture of corner and edge-sharing CoTe6 octahedra. The corner-sharing octahedral tilt angles are 51°. In the ninth Co site, Co(9) is bonded to two equivalent Te(11), two equivalent Te(13), and two equivalent Te(16) atoms to form a mixture of corner and edge-sharing CoTe6 octahedra. The corner-sharing octahedral tilt angles are 51°. In the tenth Co site, Co(10) is bonded to one Te(1), one Te(12), one Te(13), one Te(14), one Te(6), and one Te(7) atom to form a mixture of distorted face and corner-sharing CoTe6 octahedra. The corner-sharing octahedral tilt angles range from 51-52°. There are seventeen inequivalent Te sites. In the first Te site, Te(1) is bonded in a distorted rectangular see-saw-like geometry to one Co(10), one Co(4), and two equivalent Co(3) atoms. In the second Te site, Te(2) is bonded in a 3-coordinate geometry to one Co(1), one Co(2), and one Co(3) atom. In the third Te site, Te(3) is bonded in a 3-coordinate geometry to one Co(3), one Co(4), and one Co(5) atom. In the fourth Te site, Te(4) is bonded in a distorted T-shaped geometry to one Co(1) and two equivalent Co(2) atoms. In the fifth Te site, Te(5) is bonded in a 3-coordinate geometry to one Co(1), one Co(3), and one Co(4) atom. In the sixth Te site, Te(6) is bonded in a distorted rectangular see-saw-like geometry to one Co(10), one Co(2), one Co(5), and one Co(6) atom. In the seventh Te site, Te(7) is bonded to one Co(1), one Co(10), one Co(6), and one Co(7) atom to form a mixture of distorted corner and edge-sharing TeCo4 trigonal pyramids. In the eighth Te site, Te(8) is bonded in a distorted T-shaped geometry to one Co(2), one Co(3), and one Co(5) atom. In the ninth Te site, Te(9) is bonded in a distorted T-shaped geometry to one Co(4), one Co(7), and one Co(8) atom. In the tenth Te site, Te(10) is bonded in a distorted T-shaped geometry to one Co(1), one Co(2), and one Co(6) atom. In the eleventh Te site, Te(11) is bonded in a 3-coordinate geometry to one Co(5), one Co(8), and one Co(9) atom. In the twelfth Te site, Te(12) is bonded to one Co(1), one Co(10), one Co(4), and one Co(7) atom to form a mixture of distorted corner and edge-sharing TeCo4 trigonal pyramids. In the thirteenth Te site, Te(13) is bonded to one Co(10), one Co(6), one Co(8), and one Co(9) atom to form a mixture of distorted corner and edge-sharing TeCo4 trigonal pyramids. In the fourteenth Te site, Te(14) is bonded to one Co(10), one Co(4), one Co(5), and one Co(8) atom to form a mixture of distorted corner and edge-sharing TeCo4 trigonal pyramids. In the fifteenth Te site, Te(15) is bonded in a distorted T-shaped geometry to one Co(8) and two equivalent Co(7) atoms. In the sixteenth Te site, Te(16) is bonded in a 3-coordinate geometry to one Co(5), one Co(6), and one Co(9) atom. In the seventeenth Te site, Te(17) is bonded in a distorted T-shaped geometry to one Co(6), one Co(7), and one Co(8) atom.
Co19Te34 crystallizes in the triclinic P-1 space group. There are ten inequivalent Co sites. In the first Co site, Co(1) is bonded to one Te(10), one Te(12), one Te(2), one Te(4), one Te(5), and one Te(7) atom to form a mixture of corner and edge-sharing CoTe6 octahedra. The corner-sharing octahedral tilt angles range from 51-52°. The Co(1)-Te(10) bond length is 2.56 Å. The Co(1)-Te(12) bond length is 2.57 Å. The Co(1)-Te(2) bond length is 2.53 Å. The Co(1)-Te(4) bond length is 2.53 Å. The Co(1)-Te(5) bond length is 2.56 Å. The Co(1)-Te(7) bond length is 2.57 Å. In the second Co site, Co(2) is bonded to one Te(10), one Te(2), one Te(6), one Te(8), and two equivalent Te(4) atoms to form a mixture of corner and edge-sharing CoTe6 octahedra. The corner-sharing octahedral tilt angles are 51°. The Co(2)-Te(10) bond length is 2.55 Å. The Co(2)-Te(2) bond length is 2.56 Å. The Co(2)-Te(6) bond length is 2.54 Å. The Co(2)-Te(8) bond length is 2.58 Å. There is one shorter (2.54 Å) and one longer (2.55 Å) Co(2)-Te(4) bond length. In the third Co site, Co(3) is bonded to one Te(2), one Te(3), one Te(5), one Te(8), and two equivalent Te(1) atoms to form a mixture of corner and edge-sharing CoTe6 octahedra. The corner-sharing octahedral tilt angles are 51°. The Co(3)-Te(2) bond length is 2.54 Å. The Co(3)-Te(3) bond length is 2.56 Å. The Co(3)-Te(5) bond length is 2.55 Å. The Co(3)-Te(8) bond length is 2.54 Å. There is one shorter (2.56 Å) and one longer (2.57 Å) Co(3)-Te(1) bond length. In the fourth Co site, Co(4) is bonded to one Te(1), one Te(12), one Te(14), one Te(3), one Te(5), and one Te(9) atom to form a mixture of distorted face and edge-sharing CoTe6 octahedra. The Co(4)-Te(1) bond length is 2.56 Å. The Co(4)-Te(12) bond length is 2.58 Å. The Co(4)-Te(14) bond length is 2.57 Å. The Co(4)-Te(3) bond length is 2.57 Å. The Co(4)-Te(5) bond length is 2.57 Å. The Co(4)-Te(9) bond length is 2.56 Å. In the fifth Co site, Co(5) is bonded to one Te(11), one Te(14), one Te(16), one Te(3), one Te(6), and one Te(8) atom to form a mixture of corner and edge-sharing CoTe6 octahedra. The corner-sharing octahedral tilt angles are 51°. The Co(5)-Te(11) bond length is 2.56 Å. The Co(5)-Te(14) bond length is 2.55 Å. The Co(5)-Te(16) bond length is 2.56 Å. The Co(5)-Te(3) bond length is 2.55 Å. The Co(5)-Te(6) bond length is 2.54 Å. The Co(5)-Te(8) bond length is 2.55 Å. In the sixth Co site, Co(6) is bonded to one Te(10), one Te(13), one Te(16), one Te(17), one Te(6), and one Te(7) atom to form a mixture of distorted face and edge-sharing CoTe6 octahedra. The Co(6)-Te(10) bond length is 2.57 Å. The Co(6)-Te(13) bond length is 2.56 Å. The Co(6)-Te(16) bond length is 2.56 Å. The Co(6)-Te(17) bond length is 2.57 Å. The Co(6)-Te(6) bond length is 2.57 Å. The Co(6)-Te(7) bond length is 2.58 Å. In the seventh Co site, Co(7) is bonded to one Te(12), one Te(17), one Te(7), one Te(9), and two equivalent Te(15) atoms to form a mixture of corner and edge-sharing CoTe6 octahedra. The corner-sharing octahedral tilt angles are 51°. The Co(7)-Te(12) bond length is 2.56 Å. The Co(7)-Te(17) bond length is 2.56 Å. The Co(7)-Te(7) bond length is 2.57 Å. The Co(7)-Te(9) bond length is 2.56 Å. Both Co(7)-Te(15) bond lengths are 2.54 Å. In the eighth Co site, Co(8) is bonded to one Te(11), one Te(13), one Te(14), one Te(15), one Te(17), and one Te(9) atom to form a mixture of corner and edge-sharing CoTe6 octahedra. The corner-sharing octahedral tilt angles are 51°. The Co(8)-Te(11) bond length is 2.60 Å. The Co(8)-Te(13) bond length is 2.55 Å. The Co(8)-Te(14) bond length is 2.55 Å. The Co(8)-Te(15) bond length is 2.53 Å. The Co(8)-Te(17) bond length is 2.55 Å. The Co(8)-Te(9) bond length is 2.54 Å. In the ninth Co site, Co(9) is bonded to two equivalent Te(11), two equivalent Te(13), and two equivalent Te(16) atoms to form a mixture of corner and edge-sharing CoTe6 octahedra. The corner-sharing octahedral tilt angles are 51°. Both Co(9)-Te(11) bond lengths are 2.55 Å. Both Co(9)-Te(13) bond lengths are 2.54 Å. Both Co(9)-Te(16) bond lengths are 2.56 Å. In the tenth Co site, Co(10) is bonded to one Te(1), one Te(12), one Te(13), one Te(14), one Te(6), and one Te(7) atom to form a mixture of distorted face and corner-sharing CoTe6 octahedra. The corner-sharing octahedral tilt angles range from 51-52°. The Co(10)-Te(1) bond length is 2.63 Å. The Co(10)-Te(12) bond length is 2.63 Å. The Co(10)-Te(13) bond length is 2.65 Å. The Co(10)-Te(14) bond length is 2.65 Å. The Co(10)-Te(6) bond length is 2.65 Å. The Co(10)-Te(7) bond length is 2.63 Å. There are seventeen inequivalent Te sites. In the first Te site, Te(1) is bonded in a distorted rectangular see-saw-like geometry to one Co(10), one Co(4), and two equivalent Co(3) atoms. In the second Te site, Te(2) is bonded in a 3-coordinate geometry to one Co(1), one Co(2), and one Co(3) atom. In the third Te site, Te(3) is bonded in a 3-coordinate geometry to one Co(3), one Co(4), and one Co(5) atom. In the fourth Te site, Te(4) is bonded in a distorted T-shaped geometry to one Co(1) and two equivalent Co(2) atoms. In the fifth Te site, Te(5) is bonded in a 3-coordinate geometry to one Co(1), one Co(3), and one Co(4) atom. In the sixth Te site, Te(6) is bonded in a distorted rectangular see-saw-like geometry to one Co(10), one Co(2), one Co(5), and one Co(6) atom. In the seventh Te site, Te(7) is bonded to one Co(1), one Co(10), one Co(6), and one Co(7) atom to form a mixture of distorted corner and edge-sharing TeCo4 trigonal pyramids. In the eighth Te site, Te(8) is bonded in a distorted T-shaped geometry to one Co(2), one Co(3), and one Co(5) atom. In the ninth Te site, Te(9) is bonded in a distorted T-shaped geometry to one Co(4), one Co(7), and one Co(8) atom. In the tenth Te site, Te(10) is bonded in a distorted T-shaped geometry to one Co(1), one Co(2), and one Co(6) atom. In the eleventh Te site, Te(11) is bonded in a 3-coordinate geometry to one Co(5), one Co(8), and one Co(9) atom. In the twelfth Te site, Te(12) is bonded to one Co(1), one Co(10), one Co(4), and one Co(7) atom to form a mixture of distorted corner and edge-sharing TeCo4 trigonal pyramids. In the thirteenth Te site, Te(13) is bonded to one Co(10), one Co(6), one Co(8), and one Co(9) atom to form a mixture of distorted corner and edge-sharing TeCo4 trigonal pyramids. In the fourteenth Te site, Te(14) is bonded to one Co(10), one Co(4), one Co(5), and one Co(8) atom to form a mixture of distorted corner and edge-sharing TeCo4 trigonal pyramids. In the fifteenth Te site, Te(15) is bonded in a distorted T-shaped geometry to one Co(8) and two equivalent Co(7) atoms. In the sixteenth Te site, Te(16) is bonded in a 3-coordinate geometry to one Co(5), one Co(6), and one Co(9) atom. In the seventeenth Te site, Te(17) is bonded in a distorted T-shaped geometry to one Co(6), one Co(7), and one Co(8) atom.