The crystal structure described by NbBi7O13 crystallizes in the triclinic P1 space group. Nb(1) is bonded in a 6-coordinate geometry to one O(12), one O(13), two equivalent O(10), and two equivalent O(11) atoms. There are seven inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(12), and two equivalent O(13) atoms. In the second Bi site, Bi(2) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form a mixture of distorted corner and edge-sharing BiO4 trigonal pyramids. In the third Bi site, Bi(3) is bonded to one O(1), one O(4), and two equivalent O(3) atoms to form a mixture of distorted corner and edge-sharing BiO4 trigonal pyramids. In the fourth Bi site, Bi(4) is bonded in a 6-coordinate geometry to two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms. In the fifth Bi site, Bi(5) is bonded in a 5-coordinate geometry to one O(7), two equivalent O(5), and two equivalent O(6) atoms. In the sixth Bi site, Bi(6) is bonded in a 6-coordinate geometry to two equivalent O(7), two equivalent O(8), and two equivalent O(9) atoms. In the seventh Bi site, Bi(7) is bonded in a distorted body-centered cubic geometry to two equivalent O(10), two equivalent O(11), two equivalent O(8), and two equivalent O(9) atoms. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded in a trigonal non-coplanar geometry to one Bi(3) and two equivalent Bi(2) atoms. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Bi(1) and one Bi(2) atom. In the third O site, O(3) is bonded in a trigonal non-coplanar geometry to one Bi(2) and two equivalent Bi(3) atoms. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Bi(3) and two equivalent Bi(4) 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 corner and edge-sharing OBi4 tetrahedra. In the sixth O site, O(6) is bonded to two equivalent Bi(4) and two equivalent Bi(5) atoms to form a mixture of corner and edge-sharing OBi4 tetrahedra. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Bi(5) and two equivalent Bi(6) atoms. In the eighth O site, O(8) is bonded to two equivalent Bi(6) and two equivalent Bi(7) atoms to form a mixture of corner and edge-sharing OBi4 tetrahedra. In the ninth O site, O(9) is bonded to two equivalent Bi(6) and two equivalent Bi(7) atoms to form a mixture of corner and edge-sharing OBi4 tetrahedra. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to two equivalent Nb(1) and two equivalent Bi(7) atoms. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to two equivalent Nb(1) and two equivalent Bi(7) atoms. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Nb(1) and two equivalent Bi(1) atoms. In the thirteenth O site, O(13) is bonded in a distorted trigonal planar geometry to one Nb(1) and two equivalent Bi(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_NbBi7O13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.928
_cell_length_b   3.968
_cell_length_c   22.639
_cell_angle_alpha   90.184
_cell_angle_beta   91.159
_cell_angle_gamma   91.057
_symmetry_Int_Tables_number   1
_cell_volume   352.684
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Nb  Nb0  1  0.508  0.435  0.874  1.0
  Bi  Bi1  1  0.835  0.134  0.996  1.0
  Bi  Bi2  1  0.505  0.524  0.143  1.0
  Bi  Bi3  1  0.976  0.030  0.257  1.0
  Bi  Bi4  1  0.504  0.595  0.392  1.0
  Bi  Bi5  1  0.979  0.042  0.506  1.0
  Bi  Bi6  1  0.558  0.511  0.644  1.0
  Bi  Bi7  1  0.044  0.980  0.758  1.0
  O  O8  1  0.734  0.025  0.165  1.0
  O  O9  1  0.834  0.545  0.070  1.0
  O  O10  1  0.722  0.524  0.242  1.0
  O  O11  1  0.736  0.043  0.341  1.0
  O  O12  1  0.960  0.585  0.447  1.0
  O  O13  1  0.466  0.046  0.456  1.0
  O  O14  1  0.010  0.685  0.585  1.0
  O  O15  1  0.030  0.477  0.706  1.0
  O  O16  1  0.544  0.968  0.699  1.0
  O  O17  1  0.566  0.995  0.838  1.0
  O  O18  1  0.058  0.489  0.839  1.0
  O  O19  1  0.772  0.608  0.942  1.0
  O  O20  1  0.325  0.160  0.943  1.0
[/CIF]
.
The crystal structure described by NbBi7O13 crystallizes in the triclinic P1 space group. Nb(1) is bonded in a 6-coordinate geometry to one O(12), one O(13), two equivalent O(10), and two equivalent O(11) atoms. There are seven inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(12), and two equivalent O(13) atoms. In the second Bi site, Bi(2) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form a mixture of distorted corner and edge-sharing BiO4 trigonal pyramids. In the third Bi site, Bi(3) is bonded to one O(1), one O(4), and two equivalent O(3) atoms to form a mixture of distorted corner and edge-sharing BiO4 trigonal pyramids. In the fourth Bi site, Bi(4) is bonded in a 6-coordinate geometry to two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms. In the fifth Bi site, Bi(5) is bonded in a 5-coordinate geometry to one O(7), two equivalent O(5), and two equivalent O(6) atoms. In the sixth Bi site, Bi(6) is bonded in a 6-coordinate geometry to two equivalent O(7), two equivalent O(8), and two equivalent O(9) atoms. In the seventh Bi site, Bi(7) is bonded in a distorted body-centered cubic geometry to two equivalent O(10), two equivalent O(11), two equivalent O(8), and two equivalent O(9) atoms. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded in a trigonal non-coplanar geometry to one Bi(3) and two equivalent Bi(2) atoms. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Bi(1) and one Bi(2) atom. In the third O site, O(3) is bonded in a trigonal non-coplanar geometry to one Bi(2) and two equivalent Bi(3) atoms. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Bi(3) and two equivalent Bi(4) 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 corner and edge-sharing OBi4 tetrahedra. In the sixth O site, O(6) is bonded to two equivalent Bi(4) and two equivalent Bi(5) atoms to form a mixture of corner and edge-sharing OBi4 tetrahedra. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Bi(5) and two equivalent Bi(6) atoms. In the eighth O site, O(8) is bonded to two equivalent Bi(6) and two equivalent Bi(7) atoms to form a mixture of corner and edge-sharing OBi4 tetrahedra. In the ninth O site, O(9) is bonded to two equivalent Bi(6) and two equivalent Bi(7) atoms to form a mixture of corner and edge-sharing OBi4 tetrahedra. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to two equivalent Nb(1) and two equivalent Bi(7) atoms. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to two equivalent Nb(1) and two equivalent Bi(7) atoms. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Nb(1) and two equivalent Bi(1) atoms. In the thirteenth O site, O(13) is bonded in a distorted trigonal planar geometry to one Nb(1) and two equivalent Bi(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_NbBi7O13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.928
_cell_length_b   3.968
_cell_length_c   22.639
_cell_angle_alpha   90.184
_cell_angle_beta   91.159
_cell_angle_gamma   91.057
_symmetry_Int_Tables_number   1
_cell_volume   352.684
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Nb  Nb0  1  0.508  0.435  0.874  1.0
  Bi  Bi1  1  0.835  0.134  0.996  1.0
  Bi  Bi2  1  0.505  0.524  0.143  1.0
  Bi  Bi3  1  0.976  0.030  0.257  1.0
  Bi  Bi4  1  0.504  0.595  0.392  1.0
  Bi  Bi5  1  0.979  0.042  0.506  1.0
  Bi  Bi6  1  0.558  0.511  0.644  1.0
  Bi  Bi7  1  0.044  0.980  0.758  1.0
  O  O8  1  0.734  0.025  0.165  1.0
  O  O9  1  0.834  0.545  0.070  1.0
  O  O10  1  0.722  0.524  0.242  1.0
  O  O11  1  0.736  0.043  0.341  1.0
  O  O12  1  0.960  0.585  0.447  1.0
  O  O13  1  0.466  0.046  0.456  1.0
  O  O14  1  0.010  0.685  0.585  1.0
  O  O15  1  0.030  0.477  0.706  1.0
  O  O16  1  0.544  0.968  0.699  1.0
  O  O17  1  0.566  0.995  0.838  1.0
  O  O18  1  0.058  0.489  0.839  1.0
  O  O19  1  0.772  0.608  0.942  1.0
  O  O20  1  0.325  0.160  0.943  1.0
[/CIF]
.