Ba2Co3Zn2Tl2O10 crystallizes in the triclinic P1 space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 9-coordinate geometry to one O(9), two equivalent O(6), two equivalent O(8), and four equivalent O(7) atoms. In the second Ba site, Ba(2) is bonded in a 9-coordinate geometry to one O(4), two equivalent O(1), two equivalent O(3), and four equivalent O(2) atoms. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded in a rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(3) atoms. In the second Co site, Co(2) is bonded in a rectangular see-saw-like geometry to two equivalent O(6) and two equivalent O(8) atoms. In the third Co site, Co(3) is bonded in a distorted rectangular see-saw-like geometry to two equivalent O(10) and two equivalent O(5) atoms. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(5), and two equivalent O(3) atoms. In the second Zn site, Zn(2) is bonded in a 4-coordinate geometry to one O(10), one O(5), one O(6), and one O(8) atom. There are two inequivalent Tl sites. In the first Tl site, Tl(1) is bonded in a see-saw-like geometry to one O(4), one O(7), and two equivalent O(9) atoms. In the second Tl site, Tl(2) is bonded in a see-saw-like geometry to one O(2), one O(9), and two equivalent O(4) atoms. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Ba(2), two equivalent Co(1), and one Zn(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to four equivalent Ba(2) and one Tl(2) atom. In the third O site, O(3) is bonded in a 6-coordinate geometry to two equivalent Ba(2), two equivalent Co(1), and two equivalent Zn(1) atoms. In the fourth O site, O(4) is bonded in a distorted see-saw-like geometry to one Ba(2), one Tl(1), and two equivalent Tl(2) atoms. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Co(3), one Zn(1), and one Zn(2) atom. In the sixth O site, O(6) is bonded to two equivalent Ba(1), two equivalent Co(2), and one Zn(2) atom to form distorted corner-sharing OBa2ZnCo2 square pyramids. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to four equivalent Ba(1) and one Tl(1) atom. In the eighth O site, O(8) is bonded in a distorted T-shaped geometry to two equivalent Ba(1), two equivalent Co(2), and one Zn(2) atom. In the ninth O site, O(9) is bonded in a distorted see-saw-like geometry to one Ba(1), one Tl(2), and two equivalent Tl(1) atoms. In the tenth O site, O(10) is bonded in a rectangular see-saw-like geometry to two equivalent Co(3), one Zn(1), and one Zn(2) atom.
Ba2Co3Zn2Tl2O10 crystallizes in the triclinic P1 space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 9-coordinate geometry to one O(9), two equivalent O(6), two equivalent O(8), and four equivalent O(7) atoms. The Ba(1)-O(9) bond length is 3.09 Å. There is one shorter (2.73 Å) and one longer (2.76 Å) Ba(1)-O(6) bond length. There is one shorter (2.92 Å) and one longer (3.06 Å) Ba(1)-O(8) bond length. There are a spread of Ba(1)-O(7) bond distances ranging from 2.86-2.89 Å. In the second Ba site, Ba(2) is bonded in a 9-coordinate geometry to one O(4), two equivalent O(1), two equivalent O(3), and four equivalent O(2) atoms. The Ba(2)-O(4) bond length is 3.02 Å. There is one shorter (2.75 Å) and one longer (2.91 Å) Ba(2)-O(1) bond length. There is one shorter (2.97 Å) and one longer (3.00 Å) Ba(2)-O(3) bond length. There are a spread of Ba(2)-O(2) bond distances ranging from 2.84-2.87 Å. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded in a rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(3) atoms. Both Co(1)-O(1) bond lengths are 1.99 Å. There is one shorter (1.90 Å) and one longer (1.98 Å) Co(1)-O(3) bond length. In the second Co site, Co(2) is bonded in a rectangular see-saw-like geometry to two equivalent O(6) and two equivalent O(8) atoms. There is one shorter (1.93 Å) and one longer (1.99 Å) Co(2)-O(6) bond length. There is one shorter (1.96 Å) and one longer (2.00 Å) Co(2)-O(8) bond length. In the third Co site, Co(3) is bonded in a distorted rectangular see-saw-like geometry to two equivalent O(10) and two equivalent O(5) atoms. There is one shorter (1.94 Å) and one longer (2.07 Å) Co(3)-O(10) bond length. There is one shorter (1.89 Å) and one longer (2.04 Å) Co(3)-O(5) bond length. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(5), and two equivalent O(3) atoms. The Zn(1)-O(1) bond length is 2.04 Å. The Zn(1)-O(10) bond length is 2.00 Å. The Zn(1)-O(5) bond length is 2.37 Å. There is one shorter (2.31 Å) and one longer (2.33 Å) Zn(1)-O(3) bond length. In the second Zn site, Zn(2) is bonded in a 4-coordinate geometry to one O(10), one O(5), one O(6), and one O(8) atom. The Zn(2)-O(10) bond length is 2.04 Å. The Zn(2)-O(5) bond length is 2.18 Å. The Zn(2)-O(6) bond length is 2.39 Å. The Zn(2)-O(8) bond length is 2.02 Å. There are two inequivalent Tl sites. In the first Tl site, Tl(1) is bonded in a see-saw-like geometry to one O(4), one O(7), and two equivalent O(9) atoms. The Tl(1)-O(4) bond length is 2.18 Å. The Tl(1)-O(7) bond length is 2.10 Å. Both Tl(1)-O(9) bond lengths are 2.41 Å. In the second Tl site, Tl(2) is bonded in a see-saw-like geometry to one O(2), one O(9), and two equivalent O(4) atoms. The Tl(2)-O(2) bond length is 2.12 Å. The Tl(2)-O(9) bond length is 2.17 Å. Both Tl(2)-O(4) bond lengths are 2.42 Å. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Ba(2), two equivalent Co(1), and one Zn(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to four equivalent Ba(2) and one Tl(2) atom. In the third O site, O(3) is bonded in a 6-coordinate geometry to two equivalent Ba(2), two equivalent Co(1), and two equivalent Zn(1) atoms. In the fourth O site, O(4) is bonded in a distorted see-saw-like geometry to one Ba(2), one Tl(1), and two equivalent Tl(2) atoms. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Co(3), one Zn(1), and one Zn(2) atom. In the sixth O site, O(6) is bonded to two equivalent Ba(1), two equivalent Co(2), and one Zn(2) atom to form distorted corner-sharing OBa2ZnCo2 square pyramids. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to four equivalent Ba(1) and one Tl(1) atom. In the eighth O site, O(8) is bonded in a distorted T-shaped geometry to two equivalent Ba(1), two equivalent Co(2), and one Zn(2) atom. In the ninth O site, O(9) is bonded in a distorted see-saw-like geometry to one Ba(1), one Tl(2), and two equivalent Tl(1) atoms. In the tenth O site, O(10) is bonded in a rectangular see-saw-like geometry to two equivalent Co(3), one Zn(1), and one Zn(2) atom.