The structure described by CaCo2O4 crystallizes in the tetragonal I4_1/a space group. Ca(1) is bonded in a 8-coordinate geometry to eight equivalent O(1) atoms. Co(1) is bonded in a square co-planar geometry to four equivalent O(1) atoms. O(1) is bonded to two equivalent Ca(1) and two equivalent Co(1) atoms to form a mixture of distorted edge and corner-sharing OCa2Co2 tetrahedra. is represented by the CIF file [CIF]
data_Ca(CoO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.308
_cell_length_b   6.308
_cell_length_c   6.308
_cell_angle_alpha   125.480
_cell_angle_beta   125.480
_cell_angle_gamma   80.745
_symmetry_Int_Tables_number   1
_cell_volume   160.441
_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
  Ca  Ca0  1  0.250  0.750  0.500  1.0
  Ca  Ca1  1  0.500  0.500  0.000  1.0
  Co  Co2  1  0.875  0.125  0.250  1.0
  Co  Co3  1  0.875  0.625  0.750  1.0
  Co  Co4  1  0.875  0.125  0.750  1.0
  Co  Co5  1  0.375  0.125  0.250  1.0
  O  O6  1  0.836  0.923  0.363  1.0
  O  O7  1  0.527  0.164  0.088  1.0
  O  O8  1  0.077  0.440  0.912  1.0
  O  O9  1  0.190  0.777  0.863  1.0
  O  O10  1  0.673  0.810  0.588  1.0
  O  O11  1  0.223  0.086  0.412  1.0
  O  O12  1  0.560  0.473  0.637  1.0
  O  O13  1  0.914  0.327  0.137  1.0
[/CIF]
.
The structure described by CaCo2O4 crystallizes in the tetragonal I4_1/a space group. Ca(1) is bonded in a 8-coordinate geometry to eight equivalent O(1) atoms. Co(1) is bonded in a square co-planar geometry to four equivalent O(1) atoms. O(1) is bonded to two equivalent Ca(1) and two equivalent Co(1) atoms to form a mixture of distorted edge and corner-sharing OCa2Co2 tetrahedra. is represented by the CIF file [CIF]
data_Ca(CoO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.308
_cell_length_b   6.308
_cell_length_c   6.308
_cell_angle_alpha   125.480
_cell_angle_beta   125.480
_cell_angle_gamma   80.745
_symmetry_Int_Tables_number   1
_cell_volume   160.441
_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
  Ca  Ca0  1  0.250  0.750  0.500  1.0
  Ca  Ca1  1  0.500  0.500  0.000  1.0
  Co  Co2  1  0.875  0.125  0.250  1.0
  Co  Co3  1  0.875  0.625  0.750  1.0
  Co  Co4  1  0.875  0.125  0.750  1.0
  Co  Co5  1  0.375  0.125  0.250  1.0
  O  O6  1  0.836  0.923  0.363  1.0
  O  O7  1  0.527  0.164  0.088  1.0
  O  O8  1  0.077  0.440  0.912  1.0
  O  O9  1  0.190  0.777  0.863  1.0
  O  O10  1  0.673  0.810  0.588  1.0
  O  O11  1  0.223  0.086  0.412  1.0
  O  O12  1  0.560  0.473  0.637  1.0
  O  O13  1  0.914  0.327  0.137  1.0
[/CIF]
.