Cd2Bi6O11 is Chalcostibite-like structured and crystallizes in the triclinic P1 space group. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded to two equivalent O(10) and two equivalent O(9) atoms to form corner-sharing CdO4 tetrahedra. In the second Cd site, Cd(2) is bonded to two equivalent O(10) and two equivalent O(11) atoms to form CdO4 tetrahedra that share corners with four equivalent Cd(1)O4 tetrahedra, corners with four equivalent Cd(2)O4 tetrahedra, and corners with four equivalent Bi(6)O5 trigonal bipyramids. There are six inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(1), and two equivalent O(3) atoms. In the second Bi site, Bi(2) is bonded to two equivalent O(3) and two equivalent O(4) atoms to form distorted corner-sharing BiO4 trigonal pyramids. In the third Bi site, Bi(3) is bonded in a 4-coordinate geometry to one O(4), one O(7), and two equivalent O(6) atoms. In the fourth Bi site, Bi(4) is bonded in a 5-coordinate geometry to one O(7), two equivalent O(5), and two equivalent O(8) atoms. In the fifth Bi site, Bi(5) is bonded in a 6-coordinate geometry to two equivalent O(5), two equivalent O(8), and two equivalent O(9) atoms. In the sixth Bi site, Bi(6) is bonded to one O(1), two equivalent O(11), and two equivalent O(2) atoms to form distorted BiO5 trigonal bipyramids that share corners with four equivalent Cd(2)O4 tetrahedra and corners with four equivalent Bi(6)O5 trigonal bipyramids. There are eleven inequivalent O sites. In the first O site, O(1) is bonded in a trigonal non-coplanar geometry to one Bi(6) and two equivalent Bi(1) atoms. In the second O site, O(2) is bonded in a trigonal non-coplanar geometry to one Bi(1) and two equivalent Bi(6) atoms. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Bi(1) and two equivalent Bi(2) atoms. In the fourth O site, O(4) is bonded in a trigonal non-coplanar geometry to one Bi(3) and two equivalent Bi(2) atoms. In the fifth O site, O(5) is bonded to two equivalent Bi(4) and two equivalent Bi(5) atoms to form a mixture of edge and corner-sharing OBi4 tetrahedra. In the sixth O site, O(6) is bonded in a water-like geometry to two equivalent Bi(3) atoms. In the seventh O site, O(7) is bonded in a 2-coordinate geometry to one Bi(3) and one Bi(4) atom. In the eighth O site, O(8) is bonded to two equivalent Bi(4) and two equivalent Bi(5) atoms to form a mixture of edge and corner-sharing OBi4 tetrahedra. In the ninth O site, O(9) is bonded in a rectangular see-saw-like geometry to two equivalent Cd(1) and two equivalent Bi(5) atoms. In the tenth O site, O(10) is bonded to two equivalent Cd(1) and two equivalent Cd(2) atoms to form OCd4 tetrahedra that share corners with four equivalent O(11)Cd2Bi2 tetrahedra and corners with four equivalent O(10)Cd4 tetrahedra. In the eleventh O site, O(11) is bonded to two equivalent Cd(2) and two equivalent Bi(6) atoms to form OCd2Bi2 tetrahedra that share corners with four equivalent O(11)Cd2Bi2 tetrahedra and corners with four equivalent O(10)Cd4 tetrahedra.
Cd2Bi6O11 is Chalcostibite-like structured and crystallizes in the triclinic P1 space group. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded to two equivalent O(10) and two equivalent O(9) atoms to form corner-sharing CdO4 tetrahedra. Both Cd(1)-O(10) bond lengths are 2.26 Å. There is one shorter (2.21 Å) and one longer (2.27 Å) Cd(1)-O(9) bond length. In the second Cd site, Cd(2) is bonded to two equivalent O(10) and two equivalent O(11) atoms to form CdO4 tetrahedra that share corners with four equivalent Cd(1)O4 tetrahedra, corners with four equivalent Cd(2)O4 tetrahedra, and corners with four equivalent Bi(6)O5 trigonal bipyramids. There is one shorter (2.21 Å) and one longer (2.22 Å) Cd(2)-O(10) bond length. There is one shorter (2.25 Å) and one longer (2.26 Å) Cd(2)-O(11) bond length. There are six inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(1), and two equivalent O(3) atoms. The Bi(1)-O(2) bond length is 2.43 Å. There is one shorter (2.25 Å) and one longer (2.28 Å) Bi(1)-O(1) bond length. There is one shorter (2.27 Å) and one longer (2.78 Å) Bi(1)-O(3) bond length. In the second Bi site, Bi(2) is bonded to two equivalent O(3) and two equivalent O(4) atoms to form distorted corner-sharing BiO4 trigonal pyramids. There is one shorter (2.18 Å) and one longer (2.79 Å) Bi(2)-O(3) bond length. There is one shorter (2.20 Å) and one longer (2.23 Å) Bi(2)-O(4) bond length. In the third Bi site, Bi(3) is bonded in a 4-coordinate geometry to one O(4), one O(7), and two equivalent O(6) atoms. The Bi(3)-O(4) bond length is 2.75 Å. The Bi(3)-O(7) bond length is 2.12 Å. There is one shorter (2.25 Å) and one longer (2.33 Å) Bi(3)-O(6) bond length. In the fourth Bi site, Bi(4) is bonded in a 5-coordinate geometry to one O(7), two equivalent O(5), and two equivalent O(8) atoms. The Bi(4)-O(7) bond length is 2.58 Å. There is one shorter (2.25 Å) and one longer (2.32 Å) Bi(4)-O(5) bond length. There is one shorter (2.30 Å) and one longer (2.34 Å) Bi(4)-O(8) bond length. In the fifth Bi site, Bi(5) is bonded in a 6-coordinate geometry to two equivalent O(5), two equivalent O(8), and two equivalent O(9) atoms. There is one shorter (2.29 Å) and one longer (2.31 Å) Bi(5)-O(5) bond length. There is one shorter (2.18 Å) and one longer (2.34 Å) Bi(5)-O(8) bond length. There is one shorter (2.49 Å) and one longer (2.50 Å) Bi(5)-O(9) bond length. In the sixth Bi site, Bi(6) is bonded to one O(1), two equivalent O(11), and two equivalent O(2) atoms to form distorted BiO5 trigonal bipyramids that share corners with four equivalent Cd(2)O4 tetrahedra and corners with four equivalent Bi(6)O5 trigonal bipyramids. The Bi(6)-O(1) bond length is 2.56 Å. There is one shorter (2.22 Å) and one longer (2.66 Å) Bi(6)-O(11) bond length. There is one shorter (2.25 Å) and one longer (2.29 Å) Bi(6)-O(2) bond length. There are eleven inequivalent O sites. In the first O site, O(1) is bonded in a trigonal non-coplanar geometry to one Bi(6) and two equivalent Bi(1) atoms. In the second O site, O(2) is bonded in a trigonal non-coplanar geometry to one Bi(1) and two equivalent Bi(6) atoms. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Bi(1) and two equivalent Bi(2) atoms. In the fourth O site, O(4) is bonded in a trigonal non-coplanar geometry to one Bi(3) and two equivalent Bi(2) atoms. In the fifth O site, O(5) is bonded to two equivalent Bi(4) and two equivalent Bi(5) atoms to form a mixture of edge and corner-sharing OBi4 tetrahedra. In the sixth O site, O(6) is bonded in a water-like geometry to two equivalent Bi(3) atoms. In the seventh O site, O(7) is bonded in a 2-coordinate geometry to one Bi(3) and one Bi(4) atom. In the eighth O site, O(8) is bonded to two equivalent Bi(4) and two equivalent Bi(5) atoms to form a mixture of edge and corner-sharing OBi4 tetrahedra. In the ninth O site, O(9) is bonded in a rectangular see-saw-like geometry to two equivalent Cd(1) and two equivalent Bi(5) atoms. In the tenth O site, O(10) is bonded to two equivalent Cd(1) and two equivalent Cd(2) atoms to form OCd4 tetrahedra that share corners with four equivalent O(11)Cd2Bi2 tetrahedra and corners with four equivalent O(10)Cd4 tetrahedra. In the eleventh O site, O(11) is bonded to two equivalent Cd(2) and two equivalent Bi(6) atoms to form OCd2Bi2 tetrahedra that share corners with four equivalent O(11)Cd2Bi2 tetrahedra and corners with four equivalent O(10)Cd4 tetrahedra.