The crystal structure described by Co(NiO2)2 crystallizes in the monoclinic P2_1/c space group. Co(1) is bonded to one O(1), one O(3), two equivalent O(2), and two equivalent O(4) atoms to form distorted CoO6 octahedra that share corners with six equivalent Ni(2)O6 octahedra, edges with two equivalent Co(1)O6 octahedra, edges with four equivalent Ni(1)O6 octahedra, and  a faceface with one Ni(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-57°. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to one O(2), one O(4), two equivalent O(1), and two equivalent O(3) atoms to form NiO6 octahedra that share corners with six equivalent Ni(2)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, edges with four equivalent Co(1)O6 octahedra, and  a faceface with one Ni(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 37-58°. In the second Ni site, Ni(2) is bonded to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms to form NiO6 octahedra that share corners with six equivalent Co(1)O6 octahedra, corners with six equivalent Ni(1)O6 octahedra, edges with two equivalent Ni(2)O6 octahedra,  a faceface with one Co(1)O6 octahedra, and  a faceface with one Ni(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 37-58°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Co(1), one Ni(2), and two equivalent Ni(1) atoms. In the second O site, O(2) is bonded in a 5-coordinate geometry to two equivalent Co(1), one Ni(1), and two equivalent Ni(2) atoms. In the third O site, O(3) is bonded to one Co(1), two equivalent Ni(1), and two equivalent Ni(2) atoms to form distorted OCoNi4 trigonal bipyramids that share corners with two equivalent O(3)CoNi4 trigonal bipyramids, corners with four equivalent O(4)Co2Ni2 trigonal pyramids,  an edgeedge with one O(3)CoNi4 trigonal bipyramid, and  an edgeedge with one O(4)Co2Ni2 trigonal pyramid. In the fourth O site, O(4) is bonded to two equivalent Co(1), one Ni(1), and one Ni(2) atom to form OCo2Ni2 trigonal pyramids that share corners with four equivalent O(3)CoNi4 trigonal bipyramids,  an edgeedge with one O(3)CoNi4 trigonal bipyramid, and  an edgeedge with one O(4)Co2Ni2 trigonal pyramid. is represented by the CIF file [CIF]
data_Co(NiO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.876
_cell_length_b   5.040
_cell_length_c   10.593
_cell_angle_alpha   63.716
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   281.298
_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
  Co  Co0  1  0.357  0.205  0.029  1.0
  Co  Co1  1  0.857  0.794  0.471  1.0
  Co  Co2  1  0.143  0.205  0.529  1.0
  Co  Co3  1  0.643  0.794  0.971  1.0
  Ni  Ni4  1  0.370  0.782  0.470  1.0
  Ni  Ni5  1  0.880  0.492  0.752  1.0
  Ni  Ni6  1  0.870  0.218  0.030  1.0
  Ni  Ni7  1  0.380  0.508  0.748  1.0
  Ni  Ni8  1  0.620  0.492  0.252  1.0
  Ni  Ni9  1  0.130  0.782  0.970  1.0
  Ni  Ni10  1  0.120  0.508  0.248  1.0
  Ni  Ni11  1  0.630  0.218  0.530  1.0
  O  O12  1  0.633  0.051  0.375  1.0
  O  O13  1  0.378  0.477  0.113  1.0
  O  O14  1  0.133  0.498  0.887  1.0
  O  O15  1  0.111  0.063  0.385  1.0
  O  O16  1  0.611  0.937  0.115  1.0
  O  O17  1  0.633  0.502  0.613  1.0
  O  O18  1  0.878  0.523  0.387  1.0
  O  O19  1  0.133  0.949  0.125  1.0
  O  O20  1  0.867  0.051  0.875  1.0
  O  O21  1  0.122  0.477  0.613  1.0
  O  O22  1  0.367  0.498  0.387  1.0
  O  O23  1  0.389  0.063  0.885  1.0
  O  O24  1  0.889  0.937  0.615  1.0
  O  O25  1  0.867  0.502  0.113  1.0
  O  O26  1  0.622  0.523  0.887  1.0
  O  O27  1  0.367  0.949  0.625  1.0
[/CIF]
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The crystal structure described by Co(NiO2)2 crystallizes in the monoclinic P2_1/c space group. Co(1) is bonded to one O(1), one O(3), two equivalent O(2), and two equivalent O(4) atoms to form distorted CoO6 octahedra that share corners with six equivalent Ni(2)O6 octahedra, edges with two equivalent Co(1)O6 octahedra, edges with four equivalent Ni(1)O6 octahedra, and  a faceface with one Ni(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-57°. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to one O(2), one O(4), two equivalent O(1), and two equivalent O(3) atoms to form NiO6 octahedra that share corners with six equivalent Ni(2)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, edges with four equivalent Co(1)O6 octahedra, and  a faceface with one Ni(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 37-58°. In the second Ni site, Ni(2) is bonded to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms to form NiO6 octahedra that share corners with six equivalent Co(1)O6 octahedra, corners with six equivalent Ni(1)O6 octahedra, edges with two equivalent Ni(2)O6 octahedra,  a faceface with one Co(1)O6 octahedra, and  a faceface with one Ni(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 37-58°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Co(1), one Ni(2), and two equivalent Ni(1) atoms. In the second O site, O(2) is bonded in a 5-coordinate geometry to two equivalent Co(1), one Ni(1), and two equivalent Ni(2) atoms. In the third O site, O(3) is bonded to one Co(1), two equivalent Ni(1), and two equivalent Ni(2) atoms to form distorted OCoNi4 trigonal bipyramids that share corners with two equivalent O(3)CoNi4 trigonal bipyramids, corners with four equivalent O(4)Co2Ni2 trigonal pyramids,  an edgeedge with one O(3)CoNi4 trigonal bipyramid, and  an edgeedge with one O(4)Co2Ni2 trigonal pyramid. In the fourth O site, O(4) is bonded to two equivalent Co(1), one Ni(1), and one Ni(2) atom to form OCo2Ni2 trigonal pyramids that share corners with four equivalent O(3)CoNi4 trigonal bipyramids,  an edgeedge with one O(3)CoNi4 trigonal bipyramid, and  an edgeedge with one O(4)Co2Ni2 trigonal pyramid. is represented by the CIF file [CIF]
data_Co(NiO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.876
_cell_length_b   5.040
_cell_length_c   10.593
_cell_angle_alpha   63.716
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   281.298
_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
  Co  Co0  1  0.357  0.205  0.029  1.0
  Co  Co1  1  0.857  0.794  0.471  1.0
  Co  Co2  1  0.143  0.205  0.529  1.0
  Co  Co3  1  0.643  0.794  0.971  1.0
  Ni  Ni4  1  0.370  0.782  0.470  1.0
  Ni  Ni5  1  0.880  0.492  0.752  1.0
  Ni  Ni6  1  0.870  0.218  0.030  1.0
  Ni  Ni7  1  0.380  0.508  0.748  1.0
  Ni  Ni8  1  0.620  0.492  0.252  1.0
  Ni  Ni9  1  0.130  0.782  0.970  1.0
  Ni  Ni10  1  0.120  0.508  0.248  1.0
  Ni  Ni11  1  0.630  0.218  0.530  1.0
  O  O12  1  0.633  0.051  0.375  1.0
  O  O13  1  0.378  0.477  0.113  1.0
  O  O14  1  0.133  0.498  0.887  1.0
  O  O15  1  0.111  0.063  0.385  1.0
  O  O16  1  0.611  0.937  0.115  1.0
  O  O17  1  0.633  0.502  0.613  1.0
  O  O18  1  0.878  0.523  0.387  1.0
  O  O19  1  0.133  0.949  0.125  1.0
  O  O20  1  0.867  0.051  0.875  1.0
  O  O21  1  0.122  0.477  0.613  1.0
  O  O22  1  0.367  0.498  0.387  1.0
  O  O23  1  0.389  0.063  0.885  1.0
  O  O24  1  0.889  0.937  0.615  1.0
  O  O25  1  0.867  0.502  0.113  1.0
  O  O26  1  0.622  0.523  0.887  1.0
  O  O27  1  0.367  0.949  0.625  1.0
[/CIF]
.