Bi5TiNbWO15 crystallizes in the monoclinic C2 space group. Ti(1) is bonded to one O(10), one O(12), one O(13), one O(3), one O(4), and one O(9) atom to form distorted TiO6 octahedra that share corners with five equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-35°. Nb(1) is bonded to one O(11), one O(12), one O(13), one O(3), one O(4), and one O(9) atom to form distorted NbO6 octahedra that share corners with five equivalent Ti(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-35°. There are two inequivalent W sites. In the first W site, W(1) is bonded to two equivalent O(14), two equivalent O(5), and two equivalent O(6) atoms to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles are 22°. In the second W site, W(2) is bonded to two equivalent O(15), two equivalent O(5), and two equivalent O(6) atoms to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles are 22°. There are five inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(11), one O(2), one O(7), and one O(8) atom. In the second Bi site, Bi(2) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(11), one O(2), one O(7), and one O(8) atom. In the third Bi site, Bi(3) is bonded in a 8-coordinate geometry to one O(12), one O(13), two equivalent O(3), two equivalent O(4), and two equivalent O(9) atoms. In the fourth Bi site, Bi(4) is bonded in a 6-coordinate geometry to one O(1), one O(14), one O(15), one O(2), one O(7), and one O(8) atom. In the fifth Bi site, Bi(5) is bonded in a 6-coordinate geometry to one O(1), one O(14), one O(15), one O(2), one O(7), and one O(8) atom. There are fifteen inequivalent O sites. In the first O site, O(1) is bonded to one Bi(1), one Bi(2), one Bi(4), and one Bi(5) atom to form a mixture of corner and edge-sharing OBi4 tetrahedra. In the second O site, O(2) is bonded to one Bi(1), one Bi(2), one Bi(4), and one Bi(5) atom to form a mixture of corner and edge-sharing OBi4 tetrahedra. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Ti(1), one Nb(1), and two equivalent Bi(3) atoms. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Ti(1), one Nb(1), and two equivalent Bi(3) atoms. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one W(1) and one W(2) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one W(1) and one W(2) atom. In the seventh O site, O(7) is bonded to one Bi(1), one Bi(2), one Bi(4), and one Bi(5) atom to form a mixture of corner and edge-sharing OBi4 tetrahedra. In the eighth O site, O(8) is bonded to one Bi(1), one Bi(2), one Bi(4), and one Bi(5) atom to form a mixture of corner and edge-sharing OBi4 tetrahedra. In the ninth O site, O(9) is bonded in a see-saw-like geometry to one Ti(1), one Nb(1), and two equivalent Bi(3) atoms. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one Ti(1), one Bi(1), and one Bi(2) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to one Nb(1), one Bi(1), and one Bi(2) atom. In the twelfth O site, O(12) is bonded in a distorted bent 150 degrees geometry to one Ti(1), one Nb(1), and one Bi(3) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Ti(1), one Nb(1), and one Bi(3) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal planar geometry to one W(1), one Bi(4), and one Bi(5) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal planar geometry to one W(2), one Bi(4), and one Bi(5) atom.
Bi5TiNbWO15 crystallizes in the monoclinic C2 space group. Ti(1) is bonded to one O(10), one O(12), one O(13), one O(3), one O(4), and one O(9) atom to form distorted TiO6 octahedra that share corners with five equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-35°. The Ti(1)-O(10) bond length is 1.80 Å. The Ti(1)-O(12) bond length is 2.08 Å. The Ti(1)-O(13) bond length is 1.91 Å. The Ti(1)-O(3) bond length is 1.92 Å. The Ti(1)-O(4) bond length is 2.14 Å. The Ti(1)-O(9) bond length is 2.30 Å. Nb(1) is bonded to one O(11), one O(12), one O(13), one O(3), one O(4), and one O(9) atom to form distorted NbO6 octahedra that share corners with five equivalent Ti(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-35°. The Nb(1)-O(11) bond length is 1.88 Å. The Nb(1)-O(12) bond length is 1.92 Å. The Nb(1)-O(13) bond length is 2.09 Å. The Nb(1)-O(3) bond length is 2.16 Å. The Nb(1)-O(4) bond length is 1.96 Å. The Nb(1)-O(9) bond length is 2.27 Å. There are two inequivalent W sites. In the first W site, W(1) is bonded to two equivalent O(14), two equivalent O(5), and two equivalent O(6) atoms to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles are 22°. Both W(1)-O(14) bond lengths are 1.91 Å. Both W(1)-O(5) bond lengths are 1.87 Å. Both W(1)-O(6) bond lengths are 2.09 Å. In the second W site, W(2) is bonded to two equivalent O(15), two equivalent O(5), and two equivalent O(6) atoms to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles are 22°. Both W(2)-O(15) bond lengths are 1.91 Å. Both W(2)-O(5) bond lengths are 2.09 Å. Both W(2)-O(6) bond lengths are 1.87 Å. There are five inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(11), one O(2), one O(7), and one O(8) atom. The Bi(1)-O(1) bond length is 2.31 Å. The Bi(1)-O(10) bond length is 2.62 Å. The Bi(1)-O(11) bond length is 2.54 Å. The Bi(1)-O(2) bond length is 2.22 Å. The Bi(1)-O(7) bond length is 2.29 Å. The Bi(1)-O(8) bond length is 2.50 Å. In the second Bi site, Bi(2) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(11), one O(2), one O(7), and one O(8) atom. The Bi(2)-O(1) bond length is 2.22 Å. The Bi(2)-O(10) bond length is 2.45 Å. The Bi(2)-O(11) bond length is 2.59 Å. The Bi(2)-O(2) bond length is 2.30 Å. The Bi(2)-O(7) bond length is 2.53 Å. The Bi(2)-O(8) bond length is 2.34 Å. In the third Bi site, Bi(3) is bonded in a 8-coordinate geometry to one O(12), one O(13), two equivalent O(3), two equivalent O(4), and two equivalent O(9) atoms. The Bi(3)-O(12) bond length is 2.58 Å. The Bi(3)-O(13) bond length is 2.52 Å. There is one shorter (2.53 Å) and one longer (2.61 Å) Bi(3)-O(3) bond length. There is one shorter (2.57 Å) and one longer (2.58 Å) Bi(3)-O(4) bond length. There is one shorter (2.27 Å) and one longer (2.33 Å) Bi(3)-O(9) bond length. In the fourth Bi site, Bi(4) is bonded in a 6-coordinate geometry to one O(1), one O(14), one O(15), one O(2), one O(7), and one O(8) atom. The Bi(4)-O(1) bond length is 2.31 Å. The Bi(4)-O(14) bond length is 2.50 Å. The Bi(4)-O(15) bond length is 2.48 Å. The Bi(4)-O(2) bond length is 2.52 Å. The Bi(4)-O(7) bond length is 2.33 Å. The Bi(4)-O(8) bond length is 2.21 Å. In the fifth Bi site, Bi(5) is bonded in a 6-coordinate geometry to one O(1), one O(14), one O(15), one O(2), one O(7), and one O(8) atom. The Bi(5)-O(1) bond length is 2.51 Å. The Bi(5)-O(14) bond length is 2.49 Å. The Bi(5)-O(15) bond length is 2.52 Å. The Bi(5)-O(2) bond length is 2.31 Å. The Bi(5)-O(7) bond length is 2.21 Å. The Bi(5)-O(8) bond length is 2.32 Å. There are fifteen inequivalent O sites. In the first O site, O(1) is bonded to one Bi(1), one Bi(2), one Bi(4), and one Bi(5) atom to form a mixture of corner and edge-sharing OBi4 tetrahedra. In the second O site, O(2) is bonded to one Bi(1), one Bi(2), one Bi(4), and one Bi(5) atom to form a mixture of corner and edge-sharing OBi4 tetrahedra. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Ti(1), one Nb(1), and two equivalent Bi(3) atoms. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Ti(1), one Nb(1), and two equivalent Bi(3) atoms. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one W(1) and one W(2) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one W(1) and one W(2) atom. In the seventh O site, O(7) is bonded to one Bi(1), one Bi(2), one Bi(4), and one Bi(5) atom to form a mixture of corner and edge-sharing OBi4 tetrahedra. In the eighth O site, O(8) is bonded to one Bi(1), one Bi(2), one Bi(4), and one Bi(5) atom to form a mixture of corner and edge-sharing OBi4 tetrahedra. In the ninth O site, O(9) is bonded in a see-saw-like geometry to one Ti(1), one Nb(1), and two equivalent Bi(3) atoms. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one Ti(1), one Bi(1), and one Bi(2) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to one Nb(1), one Bi(1), and one Bi(2) atom. In the twelfth O site, O(12) is bonded in a distorted bent 150 degrees geometry to one Ti(1), one Nb(1), and one Bi(3) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Ti(1), one Nb(1), and one Bi(3) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal planar geometry to one W(1), one Bi(4), and one Bi(5) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal planar geometry to one W(2), one Bi(4), and one Bi(5) atom.