Bi8V2O17 crystallizes in the monoclinic Cm space group. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(10), one O(12), one O(7), and two equivalent O(9) atoms to form distorted corner-sharing VO5 square pyramids. In the second V site, V(2) is bonded to one O(11), one O(13), one O(16), and two equivalent O(14) atoms to form distorted corner-sharing VO5 trigonal bipyramids. There are eight inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to one O(15), one O(2), and three equivalent O(17) atoms to form corner-sharing BiO5 trigonal bipyramids. In the second Bi site, Bi(2) is bonded in a 5-coordinate geometry to two equivalent O(2) and three equivalent O(1) atoms. In the third Bi site, Bi(3) is bonded to one O(1), one O(5), and three equivalent O(3) atoms to form corner-sharing BiO5 trigonal bipyramids. In the fourth Bi site, Bi(4) is bonded in a 5-coordinate geometry to two equivalent O(4) and three equivalent O(5) atoms. In the fifth Bi site, Bi(5) is bonded to one O(4), one O(8), and three equivalent O(6) atoms to form corner-sharing BiO5 trigonal bipyramids. In the sixth Bi site, Bi(6) is bonded in a 6-coordinate geometry to one O(10), two equivalent O(8), and three equivalent O(7) atoms. In the seventh Bi site, Bi(7) is bonded in a distorted body-centered cubic geometry to one O(14), one O(9), three equivalent O(11), and three equivalent O(12) atoms. In the eighth Bi site, Bi(8) is bonded in a 7-coordinate geometry to one O(13), three equivalent O(15), and three equivalent O(16) atoms. There are seventeen inequivalent O sites. In the first O site, O(1) is bonded to one Bi(3) and three equivalent Bi(2) atoms to form corner-sharing OBi4 tetrahedra. In the second O site, O(2) is bonded in a trigonal planar geometry to one Bi(1) and two equivalent Bi(2) atoms. In the third O site, O(3) is bonded in a trigonal planar geometry to three equivalent Bi(3) atoms. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Bi(5) and two equivalent Bi(4) atoms. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Bi(3) and three equivalent Bi(4) atoms. In the sixth O site, O(6) is bonded in a trigonal planar geometry to three equivalent Bi(5) atoms. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one V(1) and three equivalent Bi(6) atoms. In the eighth O site, O(8) is bonded in a trigonal non-coplanar geometry to one Bi(5) and two equivalent Bi(6) atoms. In the ninth O site, O(9) is bonded in a distorted bent 150 degrees geometry to two equivalent V(1) and one Bi(7) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one V(1) and one Bi(6) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one V(2) and three equivalent Bi(7) atoms. In the twelfth O site, O(12) is bonded to one V(1) and three equivalent Bi(7) atoms to form distorted corner-sharing OVBi3 tetrahedra. In the thirteenth O site, O(13) is bonded in a distorted single-bond geometry to one V(2) and one Bi(8) atom. In the fourteenth O site, O(14) is bonded in a 3-coordinate geometry to two equivalent V(2) and one Bi(7) atom. In the fifteenth O site, O(15) is bonded to one Bi(1) and three equivalent Bi(8) atoms to form distorted corner-sharing OBi4 tetrahedra. In the sixteenth O site, O(16) is bonded in a distorted single-bond geometry to one V(2) and three equivalent Bi(8) atoms. In the seventeenth O site, O(17) is bonded in a trigonal planar geometry to three equivalent Bi(1) atoms.
Bi8V2O17 crystallizes in the monoclinic Cm space group. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(10), one O(12), one O(7), and two equivalent O(9) atoms to form distorted corner-sharing VO5 square pyramids. The V(1)-O(10) bond length is 1.73 Å. The V(1)-O(12) bond length is 1.90 Å. The V(1)-O(7) bond length is 1.86 Å. Both V(1)-O(9) bond lengths are 1.92 Å. In the second V site, V(2) is bonded to one O(11), one O(13), one O(16), and two equivalent O(14) atoms to form distorted corner-sharing VO5 trigonal bipyramids. The V(2)-O(11) bond length is 1.93 Å. The V(2)-O(13) bond length is 1.71 Å. The V(2)-O(16) bond length is 1.83 Å. Both V(2)-O(14) bond lengths are 1.93 Å. There are eight inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to one O(15), one O(2), and three equivalent O(17) atoms to form corner-sharing BiO5 trigonal bipyramids. The Bi(1)-O(15) bond length is 2.36 Å. The Bi(1)-O(2) bond length is 2.36 Å. There are two shorter (2.27 Å) and one longer (2.38 Å) Bi(1)-O(17) bond length. In the second Bi site, Bi(2) is bonded in a 5-coordinate geometry to two equivalent O(2) and three equivalent O(1) atoms. Both Bi(2)-O(2) bond lengths are 2.32 Å. There is one shorter (2.20 Å) and two longer (2.67 Å) Bi(2)-O(1) bond lengths. In the third Bi site, Bi(3) is bonded to one O(1), one O(5), and three equivalent O(3) atoms to form corner-sharing BiO5 trigonal bipyramids. The Bi(3)-O(1) bond length is 2.30 Å. The Bi(3)-O(5) bond length is 2.37 Å. There are two shorter (2.27 Å) and one longer (2.38 Å) Bi(3)-O(3) bond length. In the fourth Bi site, Bi(4) is bonded in a 5-coordinate geometry to two equivalent O(4) and three equivalent O(5) atoms. Both Bi(4)-O(4) bond lengths are 2.28 Å. There is one shorter (2.18 Å) and two longer (2.78 Å) Bi(4)-O(5) bond lengths. In the fifth Bi site, Bi(5) is bonded to one O(4), one O(8), and three equivalent O(6) atoms to form corner-sharing BiO5 trigonal bipyramids. The Bi(5)-O(4) bond length is 2.32 Å. The Bi(5)-O(8) bond length is 2.38 Å. There are two shorter (2.26 Å) and one longer (2.39 Å) Bi(5)-O(6) bond length. In the sixth Bi site, Bi(6) is bonded in a 6-coordinate geometry to one O(10), two equivalent O(8), and three equivalent O(7) atoms. The Bi(6)-O(10) bond length is 2.32 Å. Both Bi(6)-O(8) bond lengths are 2.35 Å. There is one shorter (2.33 Å) and two longer (2.58 Å) Bi(6)-O(7) bond lengths. In the seventh Bi site, Bi(7) is bonded in a distorted body-centered cubic geometry to one O(14), one O(9), three equivalent O(11), and three equivalent O(12) atoms. The Bi(7)-O(14) bond length is 2.42 Å. The Bi(7)-O(9) bond length is 2.50 Å. There are two shorter (2.36 Å) and one longer (2.76 Å) Bi(7)-O(11) bond length. All Bi(7)-O(12) bond lengths are 2.50 Å. In the eighth Bi site, Bi(8) is bonded in a 7-coordinate geometry to one O(13), three equivalent O(15), and three equivalent O(16) atoms. The Bi(8)-O(13) bond length is 2.32 Å. There are two shorter (2.35 Å) and one longer (2.77 Å) Bi(8)-O(15) bond length. There is one shorter (2.44 Å) and two longer (2.56 Å) Bi(8)-O(16) bond lengths. There are seventeen inequivalent O sites. In the first O site, O(1) is bonded to one Bi(3) and three equivalent Bi(2) atoms to form corner-sharing OBi4 tetrahedra. In the second O site, O(2) is bonded in a trigonal planar geometry to one Bi(1) and two equivalent Bi(2) atoms. In the third O site, O(3) is bonded in a trigonal planar geometry to three equivalent Bi(3) atoms. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Bi(5) and two equivalent Bi(4) atoms. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Bi(3) and three equivalent Bi(4) atoms. In the sixth O site, O(6) is bonded in a trigonal planar geometry to three equivalent Bi(5) atoms. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one V(1) and three equivalent Bi(6) atoms. In the eighth O site, O(8) is bonded in a trigonal non-coplanar geometry to one Bi(5) and two equivalent Bi(6) atoms. In the ninth O site, O(9) is bonded in a distorted bent 150 degrees geometry to two equivalent V(1) and one Bi(7) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one V(1) and one Bi(6) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one V(2) and three equivalent Bi(7) atoms. In the twelfth O site, O(12) is bonded to one V(1) and three equivalent Bi(7) atoms to form distorted corner-sharing OVBi3 tetrahedra. In the thirteenth O site, O(13) is bonded in a distorted single-bond geometry to one V(2) and one Bi(8) atom. In the fourteenth O site, O(14) is bonded in a 3-coordinate geometry to two equivalent V(2) and one Bi(7) atom. In the fifteenth O site, O(15) is bonded to one Bi(1) and three equivalent Bi(8) atoms to form distorted corner-sharing OBi4 tetrahedra. In the sixteenth O site, O(16) is bonded in a distorted single-bond geometry to one V(2) and three equivalent Bi(8) atoms. In the seventeenth O site, O(17) is bonded in a trigonal planar geometry to three equivalent Bi(1) atoms.