Yb3(Bi7Te12)2 crystallizes in the triclinic P1 space group. There are three inequivalent Yb sites. In the first Yb site, Yb(1) is bonded in a 1-coordinate geometry to one Bi(13), one Te(10), one Te(18), one Te(19), one Te(2), one Te(4), and one Te(8) atom. In the second Yb site, Yb(2) is bonded in a 4-coordinate geometry to one Bi(7), one Te(1), one Te(10), one Te(15), one Te(16), one Te(2), one Te(5), and one Te(8) atom. In the third Yb site, Yb(3) is bonded in a 1-coordinate geometry to one Bi(8), one Te(12), one Te(18), one Te(19), one Te(4), and one Te(9) atom. There are fourteen inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 1-coordinate geometry to one Bi(6), one Te(14), one Te(15), and one Te(6) atom. In the second Bi site, Bi(2) is bonded in a 1-coordinate geometry to one Te(1), one Te(2), and one Te(24) atom. In the third Bi site, Bi(3) is bonded in a 4-coordinate geometry to one Bi(11), one Te(11), one Te(20), and one Te(21) atom. In the fourth Bi site, Bi(4) is bonded in a bent 120 degrees geometry to one Te(16) and one Te(3) atom. In the fifth Bi site, Bi(5) is bonded in a distorted water-like geometry to one Te(2) and one Te(7) atom. In the sixth Bi site, Bi(6) is bonded in a 4-coordinate geometry to one Bi(1), one Te(1), one Te(2), and one Te(5) atom. In the seventh Bi site, Bi(7) is bonded in a 4-coordinate geometry to one Yb(2), one Te(19), one Te(24), and one Te(8) atom. In the eighth Bi site, Bi(8) is bonded in a 6-coordinate geometry to one Yb(3), one Bi(14), one Te(18), one Te(20), one Te(23), and one Te(24) atom. In the ninth Bi site, Bi(9) is bonded in a 2-coordinate geometry to one Te(20), one Te(22), and one Te(9) atom. In the tenth Bi site, Bi(10) is bonded in a 3-coordinate geometry to one Te(11), one Te(13), one Te(22), and one Te(6) atom. In the eleventh Bi site, Bi(11) is bonded in a 3-coordinate geometry to one Bi(3), one Te(11), one Te(3), and one Te(6) atom. In the twelfth Bi site, Bi(12) is bonded in a 4-coordinate geometry to one Te(14), one Te(17), one Te(3), and one Te(7) atom. In the thirteenth Bi site, Bi(13) is bonded in a 5-coordinate geometry to one Yb(1), one Te(12), one Te(18), one Te(19), and one Te(24) atom. In the fourteenth Bi site, Bi(14) is bonded in a distorted single-bond geometry to one Bi(8), one Te(13), one Te(20), and one Te(23) atom. There are twenty-four inequivalent Te sites. In the first Te site, Te(1) is bonded in a 3-coordinate geometry to one Yb(2), one Bi(2), and one Bi(6) atom. In the second Te site, Te(2) is bonded in a distorted pentagonal bipyramidal geometry to one Yb(1), one Yb(2), one Bi(2), one Bi(5), one Bi(6), one Te(10), and one Te(4) atom. In the third Te site, Te(3) is bonded in a 3-coordinate geometry to one Bi(11), one Bi(12), and one Bi(4) atom. In the fourth Te site, Te(4) is bonded in a 4-coordinate geometry to one Yb(1), one Yb(3), one Te(2), and one Te(24) atom. In the fifth Te site, Te(5) is bonded in a 2-coordinate geometry to one Yb(2) and one Bi(6) atom. In the sixth Te site, Te(6) is bonded in a 5-coordinate geometry to one Bi(1), one Bi(10), one Bi(11), one Te(15), and one Te(17) atom. In the seventh Te site, Te(7) is bonded in a bent 120 degrees geometry to one Bi(12) and one Bi(5) atom. In the eighth Te site, Te(8) is bonded in a 3-coordinate geometry to one Yb(1), one Yb(2), and one Bi(7) atom. In the ninth Te site, Te(9) is bonded in a distorted bent 150 degrees geometry to one Yb(3) and one Bi(9) atom. In the tenth Te site, Te(10) is bonded in a 4-coordinate geometry to one Yb(1), one Yb(2), one Te(16), and one Te(2) atom. In the eleventh Te site, Te(11) is bonded in a 3-coordinate geometry to one Bi(10), one Bi(11), and one Bi(3) atom. In the twelfth Te site, Te(12) is bonded in a distorted rectangular see-saw-like geometry to one Yb(3), one Bi(13), one Te(21), and one Te(23) atom. In the thirteenth Te site, Te(13) is bonded in a distorted bent 120 degrees geometry to one Bi(10) and one Bi(14) atom. In the fourteenth Te site, Te(14) is bonded in a water-like geometry to one Bi(1) and one Bi(12) atom. In the fifteenth Te site, Te(15) is bonded in a 4-coordinate geometry to one Yb(2), one Bi(1), one Te(16), and one Te(6) atom. In the sixteenth Te site, Te(16) is bonded in a 4-coordinate geometry to one Yb(2), one Bi(4), one Te(10), and one Te(15) atom. In the seventeenth Te site, Te(17) is bonded in a 3-coordinate geometry to one Bi(12), one Te(22), and one Te(6) atom. In the eighteenth Te site, Te(18) is bonded in a 4-coordinate geometry to one Yb(1), one Yb(3), one Bi(13), and one Bi(8) atom. In the nineteenth Te site, Te(19) is bonded in a 4-coordinate geometry to one Yb(1), one Yb(3), one Bi(13), and one Bi(7) atom. In the twentieth Te site, Te(20) is bonded in a 4-coordinate geometry to one Bi(14), one Bi(3), one Bi(8), and one Bi(9) atom. In the twenty-first Te site, Te(21) is bonded in a 3-coordinate geometry to one Bi(3), one Te(12), and one Te(22) atom. In the twenty-second Te site, Te(22) is bonded in a 4-coordinate geometry to one Bi(10), one Bi(9), one Te(17), and one Te(21) atom. In the twenty-third Te site, Te(23) is bonded in a 4-coordinate geometry to one Bi(14), one Bi(8), one Te(12), and one Te(24) atom. In the twenty-fourth Te site, Te(24) is bonded in a 6-coordinate geometry to one Bi(13), one Bi(2), one Bi(7), one Bi(8), one Te(23), and one Te(4) atom.
Yb3(Bi7Te12)2 crystallizes in the triclinic P1 space group. There are three inequivalent Yb sites. In the first Yb site, Yb(1) is bonded in a 1-coordinate geometry to one Bi(13), one Te(10), one Te(18), one Te(19), one Te(2), one Te(4), and one Te(8) atom. The Yb(1)-Bi(13) bond length is 3.97 Å. The Yb(1)-Te(10) bond length is 3.74 Å. The Yb(1)-Te(18) bond length is 3.22 Å. The Yb(1)-Te(19) bond length is 3.55 Å. The Yb(1)-Te(2) bond length is 3.59 Å. The Yb(1)-Te(4) bond length is 3.37 Å. The Yb(1)-Te(8) bond length is 2.95 Å. In the second Yb site, Yb(2) is bonded in a 4-coordinate geometry to one Bi(7), one Te(1), one Te(10), one Te(15), one Te(16), one Te(2), one Te(5), and one Te(8) atom. The Yb(2)-Bi(7) bond length is 2.78 Å. The Yb(2)-Te(1) bond length is 3.75 Å. The Yb(2)-Te(10) bond length is 3.40 Å. The Yb(2)-Te(15) bond length is 3.88 Å. The Yb(2)-Te(16) bond length is 3.78 Å. The Yb(2)-Te(2) bond length is 3.78 Å. The Yb(2)-Te(5) bond length is 3.04 Å. The Yb(2)-Te(8) bond length is 3.13 Å. In the third Yb site, Yb(3) is bonded in a 1-coordinate geometry to one Bi(8), one Te(12), one Te(18), one Te(19), one Te(4), and one Te(9) atom. The Yb(3)-Bi(8) bond length is 4.00 Å. The Yb(3)-Te(12) bond length is 3.29 Å. The Yb(3)-Te(18) bond length is 2.91 Å. The Yb(3)-Te(19) bond length is 3.74 Å. The Yb(3)-Te(4) bond length is 3.62 Å. The Yb(3)-Te(9) bond length is 2.34 Å. There are fourteen inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 1-coordinate geometry to one Bi(6), one Te(14), one Te(15), and one Te(6) atom. The Bi(1)-Bi(6) bond length is 2.95 Å. The Bi(1)-Te(14) bond length is 2.60 Å. The Bi(1)-Te(15) bond length is 3.21 Å. The Bi(1)-Te(6) bond length is 3.54 Å. In the second Bi site, Bi(2) is bonded in a 1-coordinate geometry to one Te(1), one Te(2), and one Te(24) atom. The Bi(2)-Te(1) bond length is 2.19 Å. The Bi(2)-Te(2) bond length is 3.35 Å. The Bi(2)-Te(24) bond length is 3.12 Å. In the third Bi site, Bi(3) is bonded in a 4-coordinate geometry to one Bi(11), one Te(11), one Te(20), and one Te(21) atom. The Bi(3)-Bi(11) bond length is 3.03 Å. The Bi(3)-Te(11) bond length is 3.17 Å. The Bi(3)-Te(20) bond length is 2.90 Å. The Bi(3)-Te(21) bond length is 3.05 Å. In the fourth Bi site, Bi(4) is bonded in a bent 120 degrees geometry to one Te(16) and one Te(3) atom. The Bi(4)-Te(16) bond length is 2.59 Å. The Bi(4)-Te(3) bond length is 2.15 Å. In the fifth Bi site, Bi(5) is bonded in a distorted water-like geometry to one Te(2) and one Te(7) atom. The Bi(5)-Te(2) bond length is 2.84 Å. The Bi(5)-Te(7) bond length is 2.32 Å. In the sixth Bi site, Bi(6) is bonded in a 4-coordinate geometry to one Bi(1), one Te(1), one Te(2), and one Te(5) atom. The Bi(6)-Te(1) bond length is 2.75 Å. The Bi(6)-Te(2) bond length is 3.25 Å. The Bi(6)-Te(5) bond length is 2.59 Å. In the seventh Bi site, Bi(7) is bonded in a 4-coordinate geometry to one Yb(2), one Te(19), one Te(24), and one Te(8) atom. The Bi(7)-Te(19) bond length is 2.69 Å. The Bi(7)-Te(24) bond length is 3.30 Å. The Bi(7)-Te(8) bond length is 2.71 Å. In the eighth Bi site, Bi(8) is bonded in a 6-coordinate geometry to one Yb(3), one Bi(14), one Te(18), one Te(20), one Te(23), and one Te(24) atom. The Bi(8)-Bi(14) bond length is 3.25 Å. The Bi(8)-Te(18) bond length is 2.83 Å. The Bi(8)-Te(20) bond length is 3.38 Å. The Bi(8)-Te(23) bond length is 2.94 Å. The Bi(8)-Te(24) bond length is 3.32 Å. In the ninth Bi site, Bi(9) is bonded in a 2-coordinate geometry to one Te(20), one Te(22), and one Te(9) atom. The Bi(9)-Te(20) bond length is 3.39 Å. The Bi(9)-Te(22) bond length is 2.77 Å. The Bi(9)-Te(9) bond length is 2.38 Å. In the tenth Bi site, Bi(10) is bonded in a 3-coordinate geometry to one Te(11), one Te(13), one Te(22), and one Te(6) atom. The Bi(10)-Te(11) bond length is 3.01 Å. The Bi(10)-Te(13) bond length is 2.65 Å. The Bi(10)-Te(22) bond length is 3.13 Å. The Bi(10)-Te(6) bond length is 3.59 Å. In the eleventh Bi site, Bi(11) is bonded in a 3-coordinate geometry to one Bi(3), one Te(11), one Te(3), and one Te(6) atom. The Bi(11)-Te(11) bond length is 2.78 Å. The Bi(11)-Te(3) bond length is 2.93 Å. The Bi(11)-Te(6) bond length is 2.90 Å. In the twelfth Bi site, Bi(12) is bonded in a 4-coordinate geometry to one Te(14), one Te(17), one Te(3), and one Te(7) atom. The Bi(12)-Te(14) bond length is 3.33 Å. The Bi(12)-Te(17) bond length is 3.11 Å. The Bi(12)-Te(3) bond length is 3.49 Å. The Bi(12)-Te(7) bond length is 2.50 Å. In the thirteenth Bi site, Bi(13) is bonded in a 5-coordinate geometry to one Yb(1), one Te(12), one Te(18), one Te(19), and one Te(24) atom. The Bi(13)-Te(12) bond length is 2.86 Å. The Bi(13)-Te(18) bond length is 3.38 Å. The Bi(13)-Te(19) bond length is 2.31 Å. The Bi(13)-Te(24) bond length is 3.49 Å. In the fourteenth Bi site, Bi(14) is bonded in a distorted single-bond geometry to one Bi(8), one Te(13), one Te(20), and one Te(23) atom. The Bi(14)-Te(13) bond length is 2.05 Å. The Bi(14)-Te(20) bond length is 3.16 Å. The Bi(14)-Te(23) bond length is 3.42 Å. There are twenty-four inequivalent Te sites. In the first Te site, Te(1) is bonded in a 3-coordinate geometry to one Yb(2), one Bi(2), and one Bi(6) atom. In the second Te site, Te(2) is bonded in a distorted pentagonal bipyramidal geometry to one Yb(1), one Yb(2), one Bi(2), one Bi(5), one Bi(6), one Te(10), and one Te(4) atom. The Te(2)-Te(10) bond length is 3.04 Å. The Te(2)-Te(4) bond length is 3.07 Å. In the third Te site, Te(3) is bonded in a 3-coordinate geometry to one Bi(11), one Bi(12), and one Bi(4) atom. In the fourth Te site, Te(4) is bonded in a 4-coordinate geometry to one Yb(1), one Yb(3), one Te(2), and one Te(24) atom. The Te(4)-Te(24) bond length is 2.86 Å. In the fifth Te site, Te(5) is bonded in a 2-coordinate geometry to one Yb(2) and one Bi(6) atom. In the sixth Te site, Te(6) is bonded in a 5-coordinate geometry to one Bi(1), one Bi(10), one Bi(11), one Te(15), and one Te(17) atom. The Te(6)-Te(15) bond length is 2.94 Å. The Te(6)-Te(17) bond length is 3.09 Å. In the seventh Te site, Te(7) is bonded in a bent 120 degrees geometry to one Bi(12) and one Bi(5) atom. In the eighth Te site, Te(8) is bonded in a 3-coordinate geometry to one Yb(1), one Yb(2), and one Bi(7) atom. In the ninth Te site, Te(9) is bonded in a distorted bent 150 degrees geometry to one Yb(3) and one Bi(9) atom. In the tenth Te site, Te(10) is bonded in a 4-coordinate geometry to one Yb(1), one Yb(2), one Te(16), and one Te(2) atom. The Te(10)-Te(16) bond length is 2.87 Å. In the eleventh Te site, Te(11) is bonded in a 3-coordinate geometry to one Bi(10), one Bi(11), and one Bi(3) atom. In the twelfth Te site, Te(12) is bonded in a distorted rectangular see-saw-like geometry to one Yb(3), one Bi(13), one Te(21), and one Te(23) atom. The Te(12)-Te(21) bond length is 3.06 Å. The Te(12)-Te(23) bond length is 3.20 Å. In the thirteenth Te site, Te(13) is bonded in a distorted bent 120 degrees geometry to one Bi(10) and one Bi(14) atom. In the fourteenth Te site, Te(14) is bonded in a water-like geometry to one Bi(1) and one Bi(12) atom. In the fifteenth Te site, Te(15) is bonded in a 4-coordinate geometry to one Yb(2), one Bi(1), one Te(16), and one Te(6) atom. The Te(15)-Te(16) bond length is 3.13 Å. In the sixteenth Te site, Te(16) is bonded in a 4-coordinate geometry to one Yb(2), one Bi(4), one Te(10), and one Te(15) atom. In the seventeenth Te site, Te(17) is bonded in a 3-coordinate geometry to one Bi(12), one Te(22), and one Te(6) atom. The Te(17)-Te(22) bond length is 3.03 Å. In the eighteenth Te site, Te(18) is bonded in a 4-coordinate geometry to one Yb(1), one Yb(3), one Bi(13), and one Bi(8) atom. In the nineteenth Te site, Te(19) is bonded in a 4-coordinate geometry to one Yb(1), one Yb(3), one Bi(13), and one Bi(7) atom. In the twentieth Te site, Te(20) is bonded in a 4-coordinate geometry to one Bi(14), one Bi(3), one Bi(8), and one Bi(9) atom. In the twenty-first Te site, Te(21) is bonded in a 3-coordinate geometry to one Bi(3), one Te(12), and one Te(22) atom. The Te(21)-Te(22) bond length is 3.05 Å. In the twenty-second Te site, Te(22) is bonded in a 4-coordinate geometry to one Bi(10), one Bi(9), one Te(17), and one Te(21) atom. In the twenty-third Te site, Te(23) is bonded in a 4-coordinate geometry to one Bi(14), one Bi(8), one Te(12), and one Te(24) atom. The Te(23)-Te(24) bond length is 3.00 Å. In the twenty-fourth Te site, Te(24) is bonded in a 6-coordinate geometry to one Bi(13), one Bi(2), one Bi(7), one Bi(8), one Te(23), and one Te(4) atom.