The crystal structure described by BaCo4O7 crystallizes in the hexagonal P6_3mc space group. Ba(1) is bonded to six equivalent O(1) and six equivalent O(3) atoms to form distorted BaO12 cuboctahedra that share corners with twelve equivalent Ba(1)O12 cuboctahedra, edges with three equivalent Co(2)O4 tetrahedra, and edges with nine equivalent Co(1)O4 tetrahedra. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form CoO4 tetrahedra that share corners with two equivalent Co(2)O4 tetrahedra, corners with four equivalent Co(1)O4 tetrahedra, and edges with three equivalent Ba(1)O12 cuboctahedra. In the second Co site, Co(2) is bonded to one O(2) and three equivalent O(1) atoms to form CoO4 tetrahedra that share corners with six equivalent Co(1)O4 tetrahedra and edges with three equivalent Ba(1)O12 cuboctahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to two equivalent Ba(1), one Co(1), and one Co(2) atom. In the second O site, O(2) is bonded in a tetrahedral geometry to one Co(2) and three equivalent Co(1) atoms. In the third O site, O(3) is bonded in a distorted water-like geometry to two equivalent Ba(1) and two equivalent Co(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_BaCo4O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.363
_cell_length_b   6.363
_cell_length_c   10.139
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   355.456
_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  0.496  1.0
  Ba  Ba1  1  0.333  0.667  0.996  1.0
  Co  Co2  1  0.827  0.173  0.187  1.0
  Co  Co3  1  0.654  0.827  0.687  1.0
  Co  Co4  1  0.173  0.346  0.687  1.0
  Co  Co5  1  0.827  0.654  0.187  1.0
  Co  Co6  1  0.346  0.173  0.187  1.0
  Co  Co7  1  0.173  0.827  0.687  1.0
  Co  Co8  1  0.000  0.000  0.438  1.0
  Co  Co9  1  0.000  0.000  0.938  1.0
  O  O10  1  0.850  0.150  0.013  1.0
  O  O11  1  0.701  0.850  0.513  1.0
  O  O12  1  0.150  0.299  0.513  1.0
  O  O13  1  0.850  0.701  0.013  1.0
  O  O14  1  0.299  0.150  0.013  1.0
  O  O15  1  0.150  0.850  0.513  1.0
  O  O16  1  0.000  0.000  0.751  1.0
  O  O17  1  0.000  0.000  0.251  1.0
  O  O18  1  0.516  0.484  0.256  1.0
  O  O19  1  0.032  0.516  0.756  1.0
  O  O20  1  0.484  0.968  0.756  1.0
  O  O21  1  0.516  0.032  0.256  1.0
  O  O22  1  0.484  0.516  0.756  1.0
  O  O23  1  0.968  0.484  0.256  1.0
[/CIF]
.
The crystal structure described by BaCo4O7 crystallizes in the hexagonal P6_3mc space group. Ba(1) is bonded to six equivalent O(1) and six equivalent O(3) atoms to form distorted BaO12 cuboctahedra that share corners with twelve equivalent Ba(1)O12 cuboctahedra, edges with three equivalent Co(2)O4 tetrahedra, and edges with nine equivalent Co(1)O4 tetrahedra. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form CoO4 tetrahedra that share corners with two equivalent Co(2)O4 tetrahedra, corners with four equivalent Co(1)O4 tetrahedra, and edges with three equivalent Ba(1)O12 cuboctahedra. In the second Co site, Co(2) is bonded to one O(2) and three equivalent O(1) atoms to form CoO4 tetrahedra that share corners with six equivalent Co(1)O4 tetrahedra and edges with three equivalent Ba(1)O12 cuboctahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to two equivalent Ba(1), one Co(1), and one Co(2) atom. In the second O site, O(2) is bonded in a tetrahedral geometry to one Co(2) and three equivalent Co(1) atoms. In the third O site, O(3) is bonded in a distorted water-like geometry to two equivalent Ba(1) and two equivalent Co(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_BaCo4O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.363
_cell_length_b   6.363
_cell_length_c   10.139
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   355.456
_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  0.496  1.0
  Ba  Ba1  1  0.333  0.667  0.996  1.0
  Co  Co2  1  0.827  0.173  0.187  1.0
  Co  Co3  1  0.654  0.827  0.687  1.0
  Co  Co4  1  0.173  0.346  0.687  1.0
  Co  Co5  1  0.827  0.654  0.187  1.0
  Co  Co6  1  0.346  0.173  0.187  1.0
  Co  Co7  1  0.173  0.827  0.687  1.0
  Co  Co8  1  0.000  0.000  0.438  1.0
  Co  Co9  1  0.000  0.000  0.938  1.0
  O  O10  1  0.850  0.150  0.013  1.0
  O  O11  1  0.701  0.850  0.513  1.0
  O  O12  1  0.150  0.299  0.513  1.0
  O  O13  1  0.850  0.701  0.013  1.0
  O  O14  1  0.299  0.150  0.013  1.0
  O  O15  1  0.150  0.850  0.513  1.0
  O  O16  1  0.000  0.000  0.751  1.0
  O  O17  1  0.000  0.000  0.251  1.0
  O  O18  1  0.516  0.484  0.256  1.0
  O  O19  1  0.032  0.516  0.756  1.0
  O  O20  1  0.484  0.968  0.756  1.0
  O  O21  1  0.516  0.032  0.256  1.0
  O  O22  1  0.484  0.516  0.756  1.0
  O  O23  1  0.968  0.484  0.256  1.0
[/CIF]
.