Sc9Te2 crystallizes in the monoclinic P2_1 space group. There are eighteen inequivalent Sc sites. In the first Sc site, Sc(1) is bonded in a 2-coordinate geometry to one Sc(13), one Sc(7), one Te(1), and one Te(4) atom. In the second Sc site, Sc(2) is bonded in a 2-coordinate geometry to one Sc(13), one Sc(7), one Te(2), and one Te(3) atom. In the third Sc site, Sc(3) is bonded in a 2-coordinate geometry to one Sc(13), one Sc(7), one Te(1), and one Te(3) atom. In the fourth Sc site, Sc(4) is bonded in a 2-coordinate geometry to one Sc(13), one Sc(7), one Te(2), and one Te(4) atom. In the fifth Sc site, Sc(5) is bonded in a 4-coordinate geometry to one Te(1), one Te(2), one Te(3), and one Te(4) atom. In the sixth Sc site, Sc(6) is bonded in a 2-coordinate geometry to one Sc(7), one Te(3), and one Te(4) atom. In the seventh Sc site, Sc(7) is bonded in a 11-coordinate geometry to one Sc(1), one Sc(12), one Sc(14), one Sc(15), one Sc(18), one Sc(2), one Sc(3), one Sc(4), one Sc(6), one Sc(8), and one Sc(9) atom. In the eighth Sc site, Sc(8) is bonded in a 1-coordinate geometry to one Sc(13), one Sc(7), and one Te(1) atom. In the ninth Sc site, Sc(9) is bonded in a 1-coordinate geometry to one Sc(13), one Sc(7), and one Te(2) atom. In the tenth Sc site, Sc(10) is bonded in a 4-coordinate geometry to one Te(1), one Te(2), one Te(3), and one Te(4) atom. In the eleventh Sc site, Sc(11) is bonded in a distorted L-shaped geometry to one Sc(13), one Te(3), and one Te(4) atom. In the twelfth Sc site, Sc(12) is bonded in a 4-coordinate geometry to one Sc(7), one Te(1), one Te(2), one Te(3), and one Te(4) atom. In the thirteenth Sc site, Sc(13) is bonded in a 11-coordinate geometry to one Sc(1), one Sc(11), one Sc(14), one Sc(15), one Sc(16), one Sc(17), one Sc(2), one Sc(3), one Sc(4), one Sc(8), and one Sc(9) atom. In the fourteenth Sc site, Sc(14) is bonded in a 1-coordinate geometry to one Sc(13), one Sc(7), and one Te(3) atom. In the fifteenth Sc site, Sc(15) is bonded in a 1-coordinate geometry to one Sc(13), one Sc(7), and one Te(4) atom. In the sixteenth Sc site, Sc(16) is bonded in a 4-coordinate geometry to one Sc(13), one Te(1), one Te(2), one Te(3), and one Te(4) atom. In the seventeenth Sc site, Sc(17) is bonded in a 2-coordinate geometry to one Sc(13), one Te(1), and one Te(2) atom. In the eighteenth Sc site, Sc(18) is bonded in a distorted L-shaped geometry to one Sc(7), one Te(1), and one Te(2) atom. There are four inequivalent Te sites. In the first Te site, Te(1) is bonded in a 9-coordinate geometry to one Sc(1), one Sc(10), one Sc(12), one Sc(16), one Sc(17), one Sc(18), one Sc(3), one Sc(5), and one Sc(8) atom. In the second Te site, Te(2) is bonded in a 9-coordinate geometry to one Sc(10), one Sc(12), one Sc(16), one Sc(17), one Sc(18), one Sc(2), one Sc(4), one Sc(5), and one Sc(9) atom. In the third Te site, Te(3) is bonded in a 9-coordinate geometry to one Sc(10), one Sc(11), one Sc(12), one Sc(14), one Sc(16), one Sc(2), one Sc(3), one Sc(5), and one Sc(6) atom. In the fourth Te site, Te(4) is bonded in a 9-coordinate geometry to one Sc(1), one Sc(10), one Sc(11), one Sc(12), one Sc(15), one Sc(16), one Sc(4), one Sc(5), and one Sc(6) atom.
Sc9Te2 crystallizes in the monoclinic P2_1 space group. There are eighteen inequivalent Sc sites. In the first Sc site, Sc(1) is bonded in a 2-coordinate geometry to one Sc(13), one Sc(7), one Te(1), and one Te(4) atom. The Sc(1)-Sc(13) bond length is 3.12 Å. The Sc(1)-Sc(7) bond length is 3.25 Å. The Sc(1)-Te(1) bond length is 3.00 Å. The Sc(1)-Te(4) bond length is 3.21 Å. In the second Sc site, Sc(2) is bonded in a 2-coordinate geometry to one Sc(13), one Sc(7), one Te(2), and one Te(3) atom. The Sc(2)-Sc(13) bond length is 3.12 Å. The Sc(2)-Sc(7) bond length is 3.25 Å. The Sc(2)-Te(2) bond length is 3.00 Å. The Sc(2)-Te(3) bond length is 3.21 Å. In the third Sc site, Sc(3) is bonded in a 2-coordinate geometry to one Sc(13), one Sc(7), one Te(1), and one Te(3) atom. The Sc(3)-Sc(13) bond length is 3.26 Å. The Sc(3)-Sc(7) bond length is 3.14 Å. The Sc(3)-Te(1) bond length is 3.24 Å. The Sc(3)-Te(3) bond length is 3.01 Å. In the fourth Sc site, Sc(4) is bonded in a 2-coordinate geometry to one Sc(13), one Sc(7), one Te(2), and one Te(4) atom. The Sc(4)-Sc(13) bond length is 3.26 Å. The Sc(4)-Sc(7) bond length is 3.15 Å. The Sc(4)-Te(2) bond length is 3.23 Å. The Sc(4)-Te(4) bond length is 3.01 Å. In the fifth Sc site, Sc(5) is bonded in a 4-coordinate geometry to one Te(1), one Te(2), one Te(3), and one Te(4) atom. The Sc(5)-Te(1) bond length is 2.98 Å. The Sc(5)-Te(2) bond length is 2.98 Å. The Sc(5)-Te(3) bond length is 3.00 Å. The Sc(5)-Te(4) bond length is 3.01 Å. In the sixth Sc site, Sc(6) is bonded in a 2-coordinate geometry to one Sc(7), one Te(3), and one Te(4) atom. The Sc(6)-Sc(7) bond length is 3.36 Å. The Sc(6)-Te(3) bond length is 2.97 Å. The Sc(6)-Te(4) bond length is 2.98 Å. In the seventh Sc site, Sc(7) is bonded in a 11-coordinate geometry to one Sc(1), one Sc(12), one Sc(14), one Sc(15), one Sc(18), one Sc(2), one Sc(3), one Sc(4), one Sc(6), one Sc(8), and one Sc(9) atom. The Sc(7)-Sc(12) bond length is 3.38 Å. The Sc(7)-Sc(14) bond length is 3.14 Å. The Sc(7)-Sc(15) bond length is 3.14 Å. The Sc(7)-Sc(18) bond length is 3.37 Å. The Sc(7)-Sc(8) bond length is 2.99 Å. The Sc(7)-Sc(9) bond length is 2.99 Å. In the eighth Sc site, Sc(8) is bonded in a 1-coordinate geometry to one Sc(13), one Sc(7), and one Te(1) atom. The Sc(8)-Sc(13) bond length is 3.15 Å. The Sc(8)-Te(1) bond length is 3.11 Å. In the ninth Sc site, Sc(9) is bonded in a 1-coordinate geometry to one Sc(13), one Sc(7), and one Te(2) atom. The Sc(9)-Sc(13) bond length is 3.15 Å. The Sc(9)-Te(2) bond length is 3.11 Å. In the tenth Sc site, Sc(10) is bonded in a 4-coordinate geometry to one Te(1), one Te(2), one Te(3), and one Te(4) atom. The Sc(10)-Te(1) bond length is 3.00 Å. The Sc(10)-Te(2) bond length is 3.00 Å. The Sc(10)-Te(3) bond length is 3.00 Å. The Sc(10)-Te(4) bond length is 3.00 Å. In the eleventh Sc site, Sc(11) is bonded in a distorted L-shaped geometry to one Sc(13), one Te(3), and one Te(4) atom. The Sc(11)-Sc(13) bond length is 3.37 Å. The Sc(11)-Te(3) bond length is 2.96 Å. The Sc(11)-Te(4) bond length is 2.95 Å. In the twelfth Sc site, Sc(12) is bonded in a 4-coordinate geometry to one Sc(7), one Te(1), one Te(2), one Te(3), and one Te(4) atom. The Sc(12)-Te(1) bond length is 3.09 Å. The Sc(12)-Te(2) bond length is 3.10 Å. The Sc(12)-Te(3) bond length is 3.02 Å. The Sc(12)-Te(4) bond length is 3.02 Å. In the thirteenth Sc site, Sc(13) is bonded in a 11-coordinate geometry to one Sc(1), one Sc(11), one Sc(14), one Sc(15), one Sc(16), one Sc(17), one Sc(2), one Sc(3), one Sc(4), one Sc(8), and one Sc(9) atom. The Sc(13)-Sc(14) bond length is 2.98 Å. The Sc(13)-Sc(15) bond length is 2.98 Å. The Sc(13)-Sc(16) bond length is 3.35 Å. The Sc(13)-Sc(17) bond length is 3.38 Å. In the fourteenth Sc site, Sc(14) is bonded in a 1-coordinate geometry to one Sc(13), one Sc(7), and one Te(3) atom. The Sc(14)-Te(3) bond length is 3.10 Å. In the fifteenth Sc site, Sc(15) is bonded in a 1-coordinate geometry to one Sc(13), one Sc(7), and one Te(4) atom. The Sc(15)-Te(4) bond length is 3.10 Å. In the sixteenth Sc site, Sc(16) is bonded in a 4-coordinate geometry to one Sc(13), one Te(1), one Te(2), one Te(3), and one Te(4) atom. The Sc(16)-Te(1) bond length is 3.04 Å. The Sc(16)-Te(2) bond length is 3.04 Å. The Sc(16)-Te(3) bond length is 3.09 Å. The Sc(16)-Te(4) bond length is 3.09 Å. In the seventeenth Sc site, Sc(17) is bonded in a 2-coordinate geometry to one Sc(13), one Te(1), and one Te(2) atom. The Sc(17)-Te(1) bond length is 2.97 Å. The Sc(17)-Te(2) bond length is 2.97 Å. In the eighteenth Sc site, Sc(18) is bonded in a distorted L-shaped geometry to one Sc(7), one Te(1), and one Te(2) atom. The Sc(18)-Te(1) bond length is 2.94 Å. The Sc(18)-Te(2) bond length is 2.94 Å. There are four inequivalent Te sites. In the first Te site, Te(1) is bonded in a 9-coordinate geometry to one Sc(1), one Sc(10), one Sc(12), one Sc(16), one Sc(17), one Sc(18), one Sc(3), one Sc(5), and one Sc(8) atom. In the second Te site, Te(2) is bonded in a 9-coordinate geometry to one Sc(10), one Sc(12), one Sc(16), one Sc(17), one Sc(18), one Sc(2), one Sc(4), one Sc(5), and one Sc(9) atom. In the third Te site, Te(3) is bonded in a 9-coordinate geometry to one Sc(10), one Sc(11), one Sc(12), one Sc(14), one Sc(16), one Sc(2), one Sc(3), one Sc(5), and one Sc(6) atom. In the fourth Te site, Te(4) is bonded in a 9-coordinate geometry to one Sc(1), one Sc(10), one Sc(11), one Sc(12), one Sc(15), one Sc(16), one Sc(4), one Sc(5), and one Sc(6) atom.