The crystal structure described by NaBi5O8 crystallizes in the triclinic P-1 space group. Na(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), one O(5), one O(6), and two equivalent O(4) atoms. There are five inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a distorted rectangular see-saw-like geometry to one O(2), one O(3), and two equivalent O(1) atoms. In the second Bi site, Bi(2) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(4), one O(5), and one O(8) atom. In the third Bi site, Bi(3) is bonded in a 6-coordinate geometry to one O(3), one O(4), one O(6), one O(7), and two equivalent O(8) atoms. In the fourth Bi site, Bi(4) is bonded in a distorted see-saw-like geometry to one O(2), one O(5), one O(6), and one O(8) atom. In the fifth Bi site, Bi(5) is bonded in a distorted rectangular see-saw-like geometry to one O(3), one O(6), and two equivalent O(7) atoms. There are eight inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Bi(2), and two equivalent Bi(1) atoms to form distorted ONaBi3 tetrahedra that share  a cornercorner with one O(4)Na2Bi2 tetrahedra, corners with two equivalent O(2)NaBi3 tetrahedra,  an edgeedge with one O(4)Na2Bi2 tetrahedra,  an edgeedge with one O(1)NaBi3 tetrahedra, and  an edgeedge with one O(2)NaBi3 tetrahedra. In the second O site, O(2) is bonded to one Na(1), one Bi(1), one Bi(2), and one Bi(4) atom to form distorted ONaBi3 tetrahedra that share  a cornercorner with one O(4)Na2Bi2 tetrahedra, corners with two equivalent O(1)NaBi3 tetrahedra,  an edgeedge with one O(4)Na2Bi2 tetrahedra, and  an edgeedge with one O(1)NaBi3 tetrahedra. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Na(1), one Bi(1), one Bi(3), and one Bi(5) atom. In the fourth O site, O(4) is bonded to two equivalent Na(1), one Bi(2), and one Bi(3) atom to form ONa2Bi2 tetrahedra that share  a cornercorner with one O(1)NaBi3 tetrahedra,  a cornercorner with one O(2)NaBi3 tetrahedra,  an edgeedge with one O(4)Na2Bi2 tetrahedra,  an edgeedge with one O(1)NaBi3 tetrahedra, and  an edgeedge with one O(2)NaBi3 tetrahedra. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Na(1), one Bi(2), and one Bi(4) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Na(1), one Bi(3), one Bi(4), and one Bi(5) atom. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Bi(3) and two equivalent Bi(5) atoms. In the eighth O site, O(8) is bonded in a distorted see-saw-like geometry to one Bi(2), one Bi(4), and two equivalent Bi(3) atoms. is represented by the CIF card [CIF]
data_NaBi5O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.262
_cell_length_b   7.356
_cell_length_c   10.296
_cell_angle_alpha   70.811
_cell_angle_beta   72.812
_cell_angle_gamma   80.053
_symmetry_Int_Tables_number   1
_cell_volume   494.449
_cell_formula_units_Z   2
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
  Na  Na0  1  0.740  0.402  0.958  1.0
  Na  Na1  1  0.260  0.598  0.042  1.0
  Bi  Bi2  1  0.755  0.904  0.965  1.0
  Bi  Bi3  1  0.536  0.819  0.727  1.0
  Bi  Bi4  1  0.535  0.380  0.681  1.0
  Bi  Bi5  1  0.114  0.741  0.657  1.0
  Bi  Bi6  1  0.060  0.276  0.640  1.0
  Bi  Bi7  1  0.940  0.724  0.360  1.0
  Bi  Bi8  1  0.886  0.259  0.343  1.0
  Bi  Bi9  1  0.465  0.620  0.319  1.0
  Bi  Bi10  1  0.464  0.181  0.273  1.0
  Bi  Bi11  1  0.245  0.096  0.035  1.0
  O  O12  1  0.485  0.900  0.920  1.0
  O  O13  1  0.830  0.741  0.809  1.0
  O  O14  1  0.813  0.176  0.815  1.0
  O  O15  1  0.503  0.529  0.838  1.0
  O  O16  1  0.213  0.850  0.788  1.0
  O  O17  1  0.132  0.434  0.754  1.0
  O  O18  1  0.825  0.471  0.573  1.0
  O  O19  1  0.446  0.664  0.560  1.0
  O  O20  1  0.554  0.336  0.440  1.0
  O  O21  1  0.175  0.529  0.427  1.0
  O  O22  1  0.868  0.566  0.246  1.0
  O  O23  1  0.787  0.150  0.212  1.0
  O  O24  1  0.497  0.471  0.162  1.0
  O  O25  1  0.187  0.824  0.185  1.0
  O  O26  1  0.170  0.259  0.191  1.0
  O  O27  1  0.515  0.100  0.080  1.0
[/CIF]
.
The crystal structure described by NaBi5O8 crystallizes in the triclinic P-1 space group. Na(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), one O(5), one O(6), and two equivalent O(4) atoms. There are five inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a distorted rectangular see-saw-like geometry to one O(2), one O(3), and two equivalent O(1) atoms. In the second Bi site, Bi(2) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(4), one O(5), and one O(8) atom. In the third Bi site, Bi(3) is bonded in a 6-coordinate geometry to one O(3), one O(4), one O(6), one O(7), and two equivalent O(8) atoms. In the fourth Bi site, Bi(4) is bonded in a distorted see-saw-like geometry to one O(2), one O(5), one O(6), and one O(8) atom. In the fifth Bi site, Bi(5) is bonded in a distorted rectangular see-saw-like geometry to one O(3), one O(6), and two equivalent O(7) atoms. There are eight inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Bi(2), and two equivalent Bi(1) atoms to form distorted ONaBi3 tetrahedra that share  a cornercorner with one O(4)Na2Bi2 tetrahedra, corners with two equivalent O(2)NaBi3 tetrahedra,  an edgeedge with one O(4)Na2Bi2 tetrahedra,  an edgeedge with one O(1)NaBi3 tetrahedra, and  an edgeedge with one O(2)NaBi3 tetrahedra. In the second O site, O(2) is bonded to one Na(1), one Bi(1), one Bi(2), and one Bi(4) atom to form distorted ONaBi3 tetrahedra that share  a cornercorner with one O(4)Na2Bi2 tetrahedra, corners with two equivalent O(1)NaBi3 tetrahedra,  an edgeedge with one O(4)Na2Bi2 tetrahedra, and  an edgeedge with one O(1)NaBi3 tetrahedra. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Na(1), one Bi(1), one Bi(3), and one Bi(5) atom. In the fourth O site, O(4) is bonded to two equivalent Na(1), one Bi(2), and one Bi(3) atom to form ONa2Bi2 tetrahedra that share  a cornercorner with one O(1)NaBi3 tetrahedra,  a cornercorner with one O(2)NaBi3 tetrahedra,  an edgeedge with one O(4)Na2Bi2 tetrahedra,  an edgeedge with one O(1)NaBi3 tetrahedra, and  an edgeedge with one O(2)NaBi3 tetrahedra. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Na(1), one Bi(2), and one Bi(4) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Na(1), one Bi(3), one Bi(4), and one Bi(5) atom. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Bi(3) and two equivalent Bi(5) atoms. In the eighth O site, O(8) is bonded in a distorted see-saw-like geometry to one Bi(2), one Bi(4), and two equivalent Bi(3) atoms. is represented by the CIF card [CIF]
data_NaBi5O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.262
_cell_length_b   7.356
_cell_length_c   10.296
_cell_angle_alpha   70.811
_cell_angle_beta   72.812
_cell_angle_gamma   80.053
_symmetry_Int_Tables_number   1
_cell_volume   494.449
_cell_formula_units_Z   2
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
  Na  Na0  1  0.740  0.402  0.958  1.0
  Na  Na1  1  0.260  0.598  0.042  1.0
  Bi  Bi2  1  0.755  0.904  0.965  1.0
  Bi  Bi3  1  0.536  0.819  0.727  1.0
  Bi  Bi4  1  0.535  0.380  0.681  1.0
  Bi  Bi5  1  0.114  0.741  0.657  1.0
  Bi  Bi6  1  0.060  0.276  0.640  1.0
  Bi  Bi7  1  0.940  0.724  0.360  1.0
  Bi  Bi8  1  0.886  0.259  0.343  1.0
  Bi  Bi9  1  0.465  0.620  0.319  1.0
  Bi  Bi10  1  0.464  0.181  0.273  1.0
  Bi  Bi11  1  0.245  0.096  0.035  1.0
  O  O12  1  0.485  0.900  0.920  1.0
  O  O13  1  0.830  0.741  0.809  1.0
  O  O14  1  0.813  0.176  0.815  1.0
  O  O15  1  0.503  0.529  0.838  1.0
  O  O16  1  0.213  0.850  0.788  1.0
  O  O17  1  0.132  0.434  0.754  1.0
  O  O18  1  0.825  0.471  0.573  1.0
  O  O19  1  0.446  0.664  0.560  1.0
  O  O20  1  0.554  0.336  0.440  1.0
  O  O21  1  0.175  0.529  0.427  1.0
  O  O22  1  0.868  0.566  0.246  1.0
  O  O23  1  0.787  0.150  0.212  1.0
  O  O24  1  0.497  0.471  0.162  1.0
  O  O25  1  0.187  0.824  0.185  1.0
  O  O26  1  0.170  0.259  0.191  1.0
  O  O27  1  0.515  0.100  0.080  1.0
[/CIF]
.