Ba2Bi6O11 crystallizes in the monoclinic C2/m space group. Ba(1) is bonded in a 5-coordinate geometry to one O(5) and four equivalent O(6) atoms. There are three inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 5-coordinate geometry to one O(3), one O(4), and three equivalent O(1) atoms. In the second Bi site, Bi(2) is bonded in a 5-coordinate geometry to one O(1), one O(2), and three equivalent O(4) atoms. In the third Bi site, Bi(3) is bonded in a 5-coordinate geometry to one O(3), one O(6), and three equivalent O(5) atoms. There are six inequivalent O sites. In the first O site, O(1) is bonded to one Bi(2) and three equivalent Bi(1) atoms to form distorted corner-sharing OBi4 tetrahedra. In the second O site, O(2) is bonded in a linear geometry to two equivalent Bi(2) atoms. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Bi(1) and one Bi(3) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Bi(1) and three equivalent Bi(2) atoms. In the fifth O site, O(5) is bonded to one Ba(1) and three equivalent Bi(3) atoms to form corner-sharing OBaBi3 tetrahedra. In the sixth O site, O(6) is bonded in a 5-coordinate geometry to four equivalent Ba(1) and one Bi(3) atom.
Ba2Bi6O11 crystallizes in the monoclinic C2/m space group. Ba(1) is bonded in a 5-coordinate geometry to one O(5) and four equivalent O(6) atoms. The Ba(1)-O(5) bond length is 2.70 Å. There are a spread of Ba(1)-O(6) bond distances ranging from 2.43-3.35 Å. There are three inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 5-coordinate geometry to one O(3), one O(4), and three equivalent O(1) atoms. The Bi(1)-O(3) bond length is 2.26 Å. The Bi(1)-O(4) bond length is 2.22 Å. There are two shorter (2.43 Å) and one longer (2.71 Å) Bi(1)-O(1) bond length. In the second Bi site, Bi(2) is bonded in a 5-coordinate geometry to one O(1), one O(2), and three equivalent O(4) atoms. The Bi(2)-O(1) bond length is 2.22 Å. The Bi(2)-O(2) bond length is 2.21 Å. There are two shorter (2.39 Å) and one longer (2.83 Å) Bi(2)-O(4) bond length. In the third Bi site, Bi(3) is bonded in a 5-coordinate geometry to one O(3), one O(6), and three equivalent O(5) atoms. The Bi(3)-O(3) bond length is 2.14 Å. The Bi(3)-O(6) bond length is 2.65 Å. There are two shorter (2.38 Å) and one longer (2.65 Å) Bi(3)-O(5) bond length. There are six inequivalent O sites. In the first O site, O(1) is bonded to one Bi(2) and three equivalent Bi(1) atoms to form distorted corner-sharing OBi4 tetrahedra. In the second O site, O(2) is bonded in a linear geometry to two equivalent Bi(2) atoms. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Bi(1) and one Bi(3) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Bi(1) and three equivalent Bi(2) atoms. In the fifth O site, O(5) is bonded to one Ba(1) and three equivalent Bi(3) atoms to form corner-sharing OBaBi3 tetrahedra. In the sixth O site, O(6) is bonded in a 5-coordinate geometry to four equivalent Ba(1) and one Bi(3) atom.