The structure described by BaBi4O7 crystallizes in the hexagonal P6_3mc space group. Ba(1) is bonded in a 3-coordinate geometry to three equivalent O(3) atoms. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form corner-sharing BiO4 tetrahedra. In the second Bi site, Bi(2) is bonded to one O(2) and three equivalent O(1) atoms to form distorted corner-sharing BiO4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Bi(1) and one Bi(2) atom. In the second O site, O(2) is bonded in a tetrahedral geometry to one Bi(2) and three equivalent Bi(1) atoms. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Ba(1) and two equivalent Bi(1) atoms. is represented by the CIF file [CIF]
data_BaBi4O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.870
_cell_length_b   7.870
_cell_length_c   13.362
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   716.665
_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
  Ba  Ba0  1  0.667  0.333  0.401  1.0
  Ba  Ba1  1  0.333  0.667  0.901  1.0
  Bi  Bi2  1  0.834  0.166  0.193  1.0
  Bi  Bi3  1  0.669  0.834  0.693  1.0
  Bi  Bi4  1  0.166  0.331  0.693  1.0
  Bi  Bi5  1  0.834  0.669  0.193  1.0
  Bi  Bi6  1  0.331  0.166  0.193  1.0
  Bi  Bi7  1  0.166  0.834  0.693  1.0
  Bi  Bi8  1  0.000  0.000  0.461  1.0
  Bi  Bi9  1  0.000  0.000  0.961  1.0
  O  O10  1  0.859  0.141  0.031  1.0
  O  O11  1  0.717  0.859  0.531  1.0
  O  O12  1  0.141  0.283  0.531  1.0
  O  O13  1  0.859  0.717  0.031  1.0
  O  O14  1  0.283  0.141  0.031  1.0
  O  O15  1  0.141  0.859  0.531  1.0
  O  O16  1  0.000  0.000  0.750  1.0
  O  O17  1  0.000  0.000  0.250  1.0
  O  O18  1  0.536  0.464  0.257  1.0
  O  O19  1  0.072  0.536  0.757  1.0
  O  O20  1  0.464  0.928  0.757  1.0
  O  O21  1  0.536  0.072  0.257  1.0
  O  O22  1  0.464  0.536  0.757  1.0
  O  O23  1  0.928  0.464  0.257  1.0
[/CIF]
.
The structure described by BaBi4O7 crystallizes in the hexagonal P6_3mc space group. Ba(1) is bonded in a 3-coordinate geometry to three equivalent O(3) atoms. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form corner-sharing BiO4 tetrahedra. In the second Bi site, Bi(2) is bonded to one O(2) and three equivalent O(1) atoms to form distorted corner-sharing BiO4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Bi(1) and one Bi(2) atom. In the second O site, O(2) is bonded in a tetrahedral geometry to one Bi(2) and three equivalent Bi(1) atoms. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Ba(1) and two equivalent Bi(1) atoms. is represented by the CIF file [CIF]
data_BaBi4O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.870
_cell_length_b   7.870
_cell_length_c   13.362
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   716.665
_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
  Ba  Ba0  1  0.667  0.333  0.401  1.0
  Ba  Ba1  1  0.333  0.667  0.901  1.0
  Bi  Bi2  1  0.834  0.166  0.193  1.0
  Bi  Bi3  1  0.669  0.834  0.693  1.0
  Bi  Bi4  1  0.166  0.331  0.693  1.0
  Bi  Bi5  1  0.834  0.669  0.193  1.0
  Bi  Bi6  1  0.331  0.166  0.193  1.0
  Bi  Bi7  1  0.166  0.834  0.693  1.0
  Bi  Bi8  1  0.000  0.000  0.461  1.0
  Bi  Bi9  1  0.000  0.000  0.961  1.0
  O  O10  1  0.859  0.141  0.031  1.0
  O  O11  1  0.717  0.859  0.531  1.0
  O  O12  1  0.141  0.283  0.531  1.0
  O  O13  1  0.859  0.717  0.031  1.0
  O  O14  1  0.283  0.141  0.031  1.0
  O  O15  1  0.141  0.859  0.531  1.0
  O  O16  1  0.000  0.000  0.750  1.0
  O  O17  1  0.000  0.000  0.250  1.0
  O  O18  1  0.536  0.464  0.257  1.0
  O  O19  1  0.072  0.536  0.757  1.0
  O  O20  1  0.464  0.928  0.757  1.0
  O  O21  1  0.536  0.072  0.257  1.0
  O  O22  1  0.464  0.536  0.757  1.0
  O  O23  1  0.928  0.464  0.257  1.0
[/CIF]
.