Ba4Y2Cu6O13 crystallizes in the orthorhombic Fmmm space group. Ba(1) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(5), two equivalent O(3), and four equivalent O(4) atoms. Y(1) is bonded in a body-centered cubic geometry to two equivalent O(1), two equivalent O(2), and four equivalent O(3) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(1), one O(2), one O(4), and two equivalent O(3) atoms to form distorted corner-sharing CuO5 square pyramids. In the second Cu site, Cu(2) is bonded in a T-shaped geometry to one O(5) and two equivalent O(4) atoms. There are five inequivalent O sites. In the first O site, O(5) is bonded in a distorted linear geometry to four equivalent Ba(1) and two equivalent Cu(2) atoms. In the second O site, O(1) is bonded to two equivalent Ba(1), two equivalent Y(1), and two equivalent Cu(1) atoms to form distorted corner-sharing OBa2Y2Cu2 octahedra. The corner-sharing octahedra are not tilted. In the third O site, O(2) is bonded in a 6-coordinate geometry to two equivalent Ba(1), two equivalent Y(1), and two equivalent Cu(1) atoms. In the fourth O site, O(3) is bonded in a 6-coordinate geometry to two equivalent Ba(1), two equivalent Y(1), and two equivalent Cu(1) atoms. In the fifth O site, O(4) is bonded in a 6-coordinate geometry to four equivalent Ba(1), one Cu(1), and one Cu(2) atom.
Ba4Y2Cu6O13 crystallizes in the orthorhombic Fmmm space group. Ba(1) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(5), two equivalent O(3), and four equivalent O(4) atoms. The Ba(1)-O(1) bond length is 2.93 Å. The Ba(1)-O(2) bond length is 3.03 Å. The Ba(1)-O(5) bond length is 2.95 Å. Both Ba(1)-O(3) bond lengths are 3.03 Å. There are two shorter (2.72 Å) and two longer (2.88 Å) Ba(1)-O(4) bond lengths. Y(1) is bonded in a body-centered cubic geometry to two equivalent O(1), two equivalent O(2), and four equivalent O(3) atoms. Both Y(1)-O(1) bond lengths are 2.43 Å. Both Y(1)-O(2) bond lengths are 2.40 Å. All Y(1)-O(3) bond lengths are 2.44 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(1), one O(2), one O(4), and two equivalent O(3) atoms to form distorted corner-sharing CuO5 square pyramids. The Cu(1)-O(1) bond length is 1.99 Å. The Cu(1)-O(2) bond length is 1.97 Å. The Cu(1)-O(4) bond length is 2.56 Å. Both Cu(1)-O(3) bond lengths are 1.94 Å. In the second Cu site, Cu(2) is bonded in a T-shaped geometry to one O(5) and two equivalent O(4) atoms. The Cu(2)-O(5) bond length is 1.90 Å. Both Cu(2)-O(4) bond lengths are 1.83 Å. There are five inequivalent O sites. In the first O site, O(5) is bonded in a distorted linear geometry to four equivalent Ba(1) and two equivalent Cu(2) atoms. In the second O site, O(1) is bonded to two equivalent Ba(1), two equivalent Y(1), and two equivalent Cu(1) atoms to form distorted corner-sharing OBa2Y2Cu2 octahedra. The corner-sharing octahedra are not tilted. In the third O site, O(2) is bonded in a 6-coordinate geometry to two equivalent Ba(1), two equivalent Y(1), and two equivalent Cu(1) atoms. In the fourth O site, O(3) is bonded in a 6-coordinate geometry to two equivalent Ba(1), two equivalent Y(1), and two equivalent Cu(1) atoms. In the fifth O site, O(4) is bonded in a 6-coordinate geometry to four equivalent Ba(1), one Cu(1), and one Cu(2) atom.