The structure described by Ba2YCoO5 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 9-coordinate geometry to one O(1), two equivalent O(2), two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms. In the second Ba site, Ba(2) is bonded in a 10-coordinate geometry to one O(2), two equivalent O(3), two equivalent O(4), two equivalent O(5), and three equivalent O(1) atoms. Y(1) is bonded to one O(1), one O(2), one O(4), one O(5), and two equivalent O(3) atoms to form YO6 octahedra that share corners with two equivalent Y(1)O6 octahedra and corners with four equivalent Co(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 18°. Co(1) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form CoO4 tetrahedra that share corners with four equivalent Y(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-45°. There are five inequivalent O sites. In the first O site, O(5) is bonded in a 6-coordinate geometry to two equivalent Ba(1), two equivalent Ba(2), one Y(1), and one Co(1) atom. In the second O site, O(1) is bonded in a 6-coordinate geometry to one Ba(1), three equivalent Ba(2), one Y(1), and one Co(1) atom. In the third O site, O(2) is bonded in a 5-coordinate geometry to one Ba(2), two equivalent Ba(1), one Y(1), and one Co(1) atom. In the fourth O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Ba(1), two equivalent Ba(2), and two equivalent Y(1) atoms. In the fifth O site, O(4) is bonded in a 6-coordinate geometry to two equivalent Ba(1), two equivalent Ba(2), one Y(1), and one Co(1) atom. is represented by the CIF file [CIF]
data_Ba2YCoO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.113
_cell_length_b   7.906
_cell_length_c   12.404
_cell_angle_alpha   91.704
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   599.292
_cell_formula_units_Z   4
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  0.758  0.491  0.360  1.0
  Ba  Ba1  1  0.742  0.991  0.860  1.0
  Ba  Ba2  1  0.242  0.509  0.640  1.0
  Ba  Ba3  1  0.258  0.009  0.140  1.0
  Ba  Ba4  1  0.754  0.993  0.385  1.0
  Ba  Ba5  1  0.746  0.493  0.885  1.0
  Ba  Ba6  1  0.246  0.007  0.615  1.0
  Ba  Ba7  1  0.254  0.507  0.115  1.0
  Y  Y8  1  0.748  0.264  0.629  1.0
  Y  Y9  1  0.752  0.764  0.129  1.0
  Y  Y10  1  0.252  0.736  0.371  1.0
  Y  Y11  1  0.248  0.236  0.871  1.0
  Co  Co12  1  0.742  0.746  0.593  1.0
  Co  Co13  1  0.758  0.246  0.093  1.0
  Co  Co14  1  0.258  0.254  0.407  1.0
  Co  Co15  1  0.242  0.754  0.907  1.0
  O  O16  1  0.755  0.971  0.632  1.0
  O  O17  1  0.745  0.471  0.132  1.0
  O  O18  1  0.245  0.029  0.368  1.0
  O  O19  1  0.255  0.529  0.868  1.0
  O  O20  1  0.738  0.056  0.171  1.0
  O  O21  1  0.762  0.556  0.671  1.0
  O  O22  1  0.262  0.944  0.829  1.0
  O  O23  1  0.238  0.444  0.329  1.0
  O  O24  1  0.540  0.747  0.269  1.0
  O  O25  1  0.960  0.247  0.769  1.0
  O  O26  1  0.460  0.253  0.731  1.0
  O  O27  1  0.040  0.753  0.231  1.0
  O  O28  1  0.529  0.229  0.989  1.0
  O  O29  1  0.971  0.729  0.489  1.0
  O  O30  1  0.471  0.771  0.011  1.0
  O  O31  1  0.029  0.271  0.511  1.0
  O  O32  1  0.028  0.233  0.018  1.0
  O  O33  1  0.472  0.733  0.518  1.0
  O  O34  1  0.972  0.767  0.982  1.0
  O  O35  1  0.528  0.267  0.482  1.0
[/CIF]
.
The structure described by Ba2YCoO5 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 9-coordinate geometry to one O(1), two equivalent O(2), two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms. In the second Ba site, Ba(2) is bonded in a 10-coordinate geometry to one O(2), two equivalent O(3), two equivalent O(4), two equivalent O(5), and three equivalent O(1) atoms. Y(1) is bonded to one O(1), one O(2), one O(4), one O(5), and two equivalent O(3) atoms to form YO6 octahedra that share corners with two equivalent Y(1)O6 octahedra and corners with four equivalent Co(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 18°. Co(1) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form CoO4 tetrahedra that share corners with four equivalent Y(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-45°. There are five inequivalent O sites. In the first O site, O(5) is bonded in a 6-coordinate geometry to two equivalent Ba(1), two equivalent Ba(2), one Y(1), and one Co(1) atom. In the second O site, O(1) is bonded in a 6-coordinate geometry to one Ba(1), three equivalent Ba(2), one Y(1), and one Co(1) atom. In the third O site, O(2) is bonded in a 5-coordinate geometry to one Ba(2), two equivalent Ba(1), one Y(1), and one Co(1) atom. In the fourth O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Ba(1), two equivalent Ba(2), and two equivalent Y(1) atoms. In the fifth O site, O(4) is bonded in a 6-coordinate geometry to two equivalent Ba(1), two equivalent Ba(2), one Y(1), and one Co(1) atom. is represented by the CIF file [CIF]
data_Ba2YCoO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.113
_cell_length_b   7.906
_cell_length_c   12.404
_cell_angle_alpha   91.704
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   599.292
_cell_formula_units_Z   4
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  0.758  0.491  0.360  1.0
  Ba  Ba1  1  0.742  0.991  0.860  1.0
  Ba  Ba2  1  0.242  0.509  0.640  1.0
  Ba  Ba3  1  0.258  0.009  0.140  1.0
  Ba  Ba4  1  0.754  0.993  0.385  1.0
  Ba  Ba5  1  0.746  0.493  0.885  1.0
  Ba  Ba6  1  0.246  0.007  0.615  1.0
  Ba  Ba7  1  0.254  0.507  0.115  1.0
  Y  Y8  1  0.748  0.264  0.629  1.0
  Y  Y9  1  0.752  0.764  0.129  1.0
  Y  Y10  1  0.252  0.736  0.371  1.0
  Y  Y11  1  0.248  0.236  0.871  1.0
  Co  Co12  1  0.742  0.746  0.593  1.0
  Co  Co13  1  0.758  0.246  0.093  1.0
  Co  Co14  1  0.258  0.254  0.407  1.0
  Co  Co15  1  0.242  0.754  0.907  1.0
  O  O16  1  0.755  0.971  0.632  1.0
  O  O17  1  0.745  0.471  0.132  1.0
  O  O18  1  0.245  0.029  0.368  1.0
  O  O19  1  0.255  0.529  0.868  1.0
  O  O20  1  0.738  0.056  0.171  1.0
  O  O21  1  0.762  0.556  0.671  1.0
  O  O22  1  0.262  0.944  0.829  1.0
  O  O23  1  0.238  0.444  0.329  1.0
  O  O24  1  0.540  0.747  0.269  1.0
  O  O25  1  0.960  0.247  0.769  1.0
  O  O26  1  0.460  0.253  0.731  1.0
  O  O27  1  0.040  0.753  0.231  1.0
  O  O28  1  0.529  0.229  0.989  1.0
  O  O29  1  0.971  0.729  0.489  1.0
  O  O30  1  0.471  0.771  0.011  1.0
  O  O31  1  0.029  0.271  0.511  1.0
  O  O32  1  0.028  0.233  0.018  1.0
  O  O33  1  0.472  0.733  0.518  1.0
  O  O34  1  0.972  0.767  0.982  1.0
  O  O35  1  0.528  0.267  0.482  1.0
[/CIF]
.