The compound described by NaCoO2 is Caswellsilverite-like structured and crystallizes in the monoclinic P2_1/m space group. Na(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form distorted NaO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with four equivalent Co(1)O6 octahedra, edges with six equivalent Na(1)O6 octahedra, and edges with six equivalent Co(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-18°. Co(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form CoO6 octahedra that share corners with two equivalent Co(1)O6 octahedra, corners with four equivalent Na(1)O6 octahedra, edges with six equivalent Na(1)O6 octahedra, and edges with six equivalent Co(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-15°. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Na(1) and four equivalent Co(1) atoms to form ONa2Co4 octahedra that share corners with two equivalent O(1)Na2Co4 octahedra, corners with four equivalent O(2)Na4Co2 octahedra, edges with six equivalent O(1)Na2Co4 octahedra, and edges with six equivalent O(2)Na4Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-14°. In the second O site, O(2) is bonded to four equivalent Na(1) and two equivalent Co(1) atoms to form distorted ONa4Co2 octahedra that share corners with two equivalent O(2)Na4Co2 octahedra, corners with four equivalent O(1)Na2Co4 octahedra, edges with six equivalent O(1)Na2Co4 octahedra, and edges with six equivalent O(2)Na4Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-18°. is represented by the Crystallographic Information File (CIF) [CIF]
data_NaCoO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.981
_cell_length_b   4.513
_cell_length_c   6.494
_cell_angle_alpha   89.986
_cell_angle_beta   93.514
_cell_angle_gamma   89.989
_symmetry_Int_Tables_number   1
_cell_volume   87.219
_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
  Co  Co0  1  0.742  0.750  0.376  1.0
  Co  Co1  1  0.258  0.251  0.624  1.0
  Na  Na2  1  0.758  0.750  0.877  1.0
  Na  Na3  1  0.242  0.250  0.123  1.0
  O  O4  1  0.779  0.250  0.415  1.0
  O  O5  1  0.221  0.749  0.585  1.0
  O  O6  1  0.706  0.250  0.826  1.0
  O  O7  1  0.294  0.750  0.174  1.0
[/CIF]
.
The compound described by NaCoO2 is Caswellsilverite-like structured and crystallizes in the monoclinic P2_1/m space group. Na(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form distorted NaO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with four equivalent Co(1)O6 octahedra, edges with six equivalent Na(1)O6 octahedra, and edges with six equivalent Co(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-18°. Co(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form CoO6 octahedra that share corners with two equivalent Co(1)O6 octahedra, corners with four equivalent Na(1)O6 octahedra, edges with six equivalent Na(1)O6 octahedra, and edges with six equivalent Co(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-15°. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Na(1) and four equivalent Co(1) atoms to form ONa2Co4 octahedra that share corners with two equivalent O(1)Na2Co4 octahedra, corners with four equivalent O(2)Na4Co2 octahedra, edges with six equivalent O(1)Na2Co4 octahedra, and edges with six equivalent O(2)Na4Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-14°. In the second O site, O(2) is bonded to four equivalent Na(1) and two equivalent Co(1) atoms to form distorted ONa4Co2 octahedra that share corners with two equivalent O(2)Na4Co2 octahedra, corners with four equivalent O(1)Na2Co4 octahedra, edges with six equivalent O(1)Na2Co4 octahedra, and edges with six equivalent O(2)Na4Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-18°. is represented by the Crystallographic Information File (CIF) [CIF]
data_NaCoO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.981
_cell_length_b   4.513
_cell_length_c   6.494
_cell_angle_alpha   89.986
_cell_angle_beta   93.514
_cell_angle_gamma   89.989
_symmetry_Int_Tables_number   1
_cell_volume   87.219
_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
  Co  Co0  1  0.742  0.750  0.376  1.0
  Co  Co1  1  0.258  0.251  0.624  1.0
  Na  Na2  1  0.758  0.750  0.877  1.0
  Na  Na3  1  0.242  0.250  0.123  1.0
  O  O4  1  0.779  0.250  0.415  1.0
  O  O5  1  0.221  0.749  0.585  1.0
  O  O6  1  0.706  0.250  0.826  1.0
  O  O7  1  0.294  0.750  0.174  1.0
[/CIF]
.