The crystal structure described by Eu2CoO4 is (La,Ba)CuO4 structured and crystallizes in the tetragonal I4/mmm space group. Eu(1) is bonded in a 9-coordinate geometry to four equivalent O(2) and five equivalent O(1) atoms. Co(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form corner-sharing CoO6 octahedra. The corner-sharing octahedra are not tilted. There are two inequivalent O sites. In the first O site, O(1) is bonded to five equivalent Eu(1) and one Co(1) atom to form distorted OEu5Co octahedra that share corners with five equivalent O(1)Eu5Co octahedra, corners with twelve equivalent O(2)Eu4Co2 octahedra, edges with eight equivalent O(1)Eu5Co octahedra, and faces with four equivalent O(2)Eu4Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-54°. In the second O site, O(2) is bonded to four equivalent Eu(1) and two equivalent Co(1) atoms to form distorted OEu4Co2 octahedra that share corners with two equivalent O(2)Eu4Co2 octahedra, corners with twelve equivalent O(1)Eu5Co octahedra, edges with two equivalent O(2)Eu4Co2 octahedra, faces with four equivalent O(2)Eu4Co2 octahedra, and faces with four equivalent O(1)Eu5Co octahedra. The corner-sharing octahedral tilt angles range from 0-54°. is represented by the Crystallographic Information File (CIF) [CIF]
data_Eu2CoO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.615
_cell_length_b   6.615
_cell_length_c   6.615
_cell_angle_alpha   146.695
_cell_angle_beta   146.695
_cell_angle_gamma   47.816
_symmetry_Int_Tables_number   1
_cell_volume   86.911
_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
  Eu  Eu0  1  0.359  0.359  0.000  1.0
  Eu  Eu1  1  0.641  0.641  0.000  1.0
  Co  Co2  1  0.000  0.000  0.000  1.0
  O  O3  1  0.164  0.164  0.000  1.0
  O  O4  1  0.500  0.000  0.500  1.0
  O  O5  1  0.000  0.500  0.500  1.0
  O  O6  1  0.836  0.836  0.000  1.0
[/CIF]
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The crystal structure described by Eu2CoO4 is (La,Ba)CuO4 structured and crystallizes in the tetragonal I4/mmm space group. Eu(1) is bonded in a 9-coordinate geometry to four equivalent O(2) and five equivalent O(1) atoms. Co(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form corner-sharing CoO6 octahedra. The corner-sharing octahedra are not tilted. There are two inequivalent O sites. In the first O site, O(1) is bonded to five equivalent Eu(1) and one Co(1) atom to form distorted OEu5Co octahedra that share corners with five equivalent O(1)Eu5Co octahedra, corners with twelve equivalent O(2)Eu4Co2 octahedra, edges with eight equivalent O(1)Eu5Co octahedra, and faces with four equivalent O(2)Eu4Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-54°. In the second O site, O(2) is bonded to four equivalent Eu(1) and two equivalent Co(1) atoms to form distorted OEu4Co2 octahedra that share corners with two equivalent O(2)Eu4Co2 octahedra, corners with twelve equivalent O(1)Eu5Co octahedra, edges with two equivalent O(2)Eu4Co2 octahedra, faces with four equivalent O(2)Eu4Co2 octahedra, and faces with four equivalent O(1)Eu5Co octahedra. The corner-sharing octahedral tilt angles range from 0-54°. is represented by the Crystallographic Information File (CIF) [CIF]
data_Eu2CoO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.615
_cell_length_b   6.615
_cell_length_c   6.615
_cell_angle_alpha   146.695
_cell_angle_beta   146.695
_cell_angle_gamma   47.816
_symmetry_Int_Tables_number   1
_cell_volume   86.911
_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
  Eu  Eu0  1  0.359  0.359  0.000  1.0
  Eu  Eu1  1  0.641  0.641  0.000  1.0
  Co  Co2  1  0.000  0.000  0.000  1.0
  O  O3  1  0.164  0.164  0.000  1.0
  O  O4  1  0.500  0.000  0.500  1.0
  O  O5  1  0.000  0.500  0.500  1.0
  O  O6  1  0.836  0.836  0.000  1.0
[/CIF]
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