Bi3SbO7 crystallizes in the triclinic P-1 space group. There are three inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 7-coordinate geometry to one O(1), one O(4), one O(7), two equivalent O(2), and two equivalent O(3) atoms. In the second Bi site, Bi(2) is bonded in a 5-coordinate geometry to one O(4), one O(5), one O(6), and two equivalent O(1) atoms. In the third Bi site, Bi(3) is bonded in a 6-coordinate geometry to one O(1), one O(5), one O(6), one O(7), and two equivalent O(4) atoms. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to two equivalent O(3), two equivalent O(6), and two equivalent O(7) atoms to form corner-sharing SbO6 octahedra. The corner-sharing octahedral tilt angles are 40°. In the second Sb site, Sb(2) is bonded to two equivalent O(2), two equivalent O(5), and two equivalent O(7) atoms to form corner-sharing SbO6 octahedra. The corner-sharing octahedral tilt angles are 40°. There are seven inequivalent O sites. In the first O site, O(1) is bonded to one Bi(1), one Bi(3), and two equivalent Bi(2) atoms to form a mixture of edge and corner-sharing OBi4 tetrahedra. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Bi(1) and one Sb(2) atom. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Bi(1) and one Sb(1) atom. In the fourth O site, O(4) is bonded to one Bi(1), one Bi(2), and two equivalent Bi(3) atoms to form a mixture of distorted edge and corner-sharing OBi4 tetrahedra. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Bi(2), one Bi(3), and one Sb(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Bi(2), one Bi(3), and one Sb(1) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Bi(1), one Bi(3), one Sb(1), and one Sb(2) atom.
Bi3SbO7 crystallizes in the triclinic P-1 space group. There are three inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 7-coordinate geometry to one O(1), one O(4), one O(7), two equivalent O(2), and two equivalent O(3) atoms. The Bi(1)-O(1) bond length is 2.43 Å. The Bi(1)-O(4) bond length is 2.29 Å. The Bi(1)-O(7) bond length is 2.75 Å. There is one shorter (2.24 Å) and one longer (2.65 Å) Bi(1)-O(2) bond length. There is one shorter (2.22 Å) and one longer (2.50 Å) Bi(1)-O(3) bond length. In the second Bi site, Bi(2) is bonded in a 5-coordinate geometry to one O(4), one O(5), one O(6), and two equivalent O(1) atoms. The Bi(2)-O(4) bond length is 2.58 Å. The Bi(2)-O(5) bond length is 2.21 Å. The Bi(2)-O(6) bond length is 2.20 Å. There is one shorter (2.17 Å) and one longer (2.50 Å) Bi(2)-O(1) bond length. In the third Bi site, Bi(3) is bonded in a 6-coordinate geometry to one O(1), one O(5), one O(6), one O(7), and two equivalent O(4) atoms. The Bi(3)-O(1) bond length is 2.32 Å. The Bi(3)-O(5) bond length is 2.58 Å. The Bi(3)-O(6) bond length is 2.53 Å. The Bi(3)-O(7) bond length is 2.57 Å. There is one shorter (2.15 Å) and one longer (2.36 Å) Bi(3)-O(4) bond length. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to two equivalent O(3), two equivalent O(6), and two equivalent O(7) atoms to form corner-sharing SbO6 octahedra. The corner-sharing octahedral tilt angles are 40°. Both Sb(1)-O(3) bond lengths are 1.98 Å. Both Sb(1)-O(6) bond lengths are 1.98 Å. Both Sb(1)-O(7) bond lengths are 2.02 Å. In the second Sb site, Sb(2) is bonded to two equivalent O(2), two equivalent O(5), and two equivalent O(7) atoms to form corner-sharing SbO6 octahedra. The corner-sharing octahedral tilt angles are 40°. Both Sb(2)-O(2) bond lengths are 1.96 Å. Both Sb(2)-O(5) bond lengths are 1.99 Å. Both Sb(2)-O(7) bond lengths are 2.03 Å. There are seven inequivalent O sites. In the first O site, O(1) is bonded to one Bi(1), one Bi(3), and two equivalent Bi(2) atoms to form a mixture of edge and corner-sharing OBi4 tetrahedra. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Bi(1) and one Sb(2) atom. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Bi(1) and one Sb(1) atom. In the fourth O site, O(4) is bonded to one Bi(1), one Bi(2), and two equivalent Bi(3) atoms to form a mixture of distorted edge and corner-sharing OBi4 tetrahedra. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Bi(2), one Bi(3), and one Sb(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Bi(2), one Bi(3), and one Sb(1) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Bi(1), one Bi(3), one Sb(1), and one Sb(2) atom.