The crystal structure described by NaNiO2 is H-Phase structured and crystallizes in the monoclinic P2_1/m space group. Na(1) is bonded to six equivalent O(1) atoms to form distorted NaO6 pentagonal pyramids that share corners with six equivalent Ni(1)O6 octahedra, edges with six equivalent Ni(1)O6 octahedra, and edges with six equivalent Na(1)O6 pentagonal pyramids. The corner-sharing octahedral tilt angles range from 11-14°. Ni(1) is bonded to six equivalent O(1) atoms to form NiO6 octahedra that share corners with six equivalent Na(1)O6 pentagonal pyramids, edges with six equivalent Ni(1)O6 octahedra, and edges with six equivalent Na(1)O6 pentagonal pyramids. O(1) is bonded to three equivalent Na(1) and three equivalent Ni(1) atoms to form a mixture of edge, face, and corner-sharing ONa3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 0-47°. is represented by the Crystallographic Information File (CIF) [CIF]
data_NaNiO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.822
_cell_length_b   3.005
_cell_length_c   10.462
_cell_angle_alpha   90.001
_cell_angle_beta   90.001
_cell_angle_gamma   62.005
_symmetry_Int_Tables_number   1
_cell_volume   78.341
_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
  Na  Na0  1  0.688  0.632  0.250  1.0
  Na  Na1  1  0.312  0.368  0.750  1.0
  Ni  Ni2  1  0.000  0.000  0.500  1.0
  Ni  Ni3  1  1.000  1.000  1.000  1.0
  O  O4  1  0.359  0.283  0.402  1.0
  O  O5  1  0.641  0.717  0.598  1.0
  O  O6  1  0.641  0.717  0.902  1.0
  O  O7  1  0.359  0.283  0.098  1.0
[/CIF]
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The crystal structure described by NaNiO2 is H-Phase structured and crystallizes in the monoclinic P2_1/m space group. Na(1) is bonded to six equivalent O(1) atoms to form distorted NaO6 pentagonal pyramids that share corners with six equivalent Ni(1)O6 octahedra, edges with six equivalent Ni(1)O6 octahedra, and edges with six equivalent Na(1)O6 pentagonal pyramids. The corner-sharing octahedral tilt angles range from 11-14°. Ni(1) is bonded to six equivalent O(1) atoms to form NiO6 octahedra that share corners with six equivalent Na(1)O6 pentagonal pyramids, edges with six equivalent Ni(1)O6 octahedra, and edges with six equivalent Na(1)O6 pentagonal pyramids. O(1) is bonded to three equivalent Na(1) and three equivalent Ni(1) atoms to form a mixture of edge, face, and corner-sharing ONa3Ni3 octahedra. The corner-sharing octahedral tilt angles range from 0-47°. is represented by the Crystallographic Information File (CIF) [CIF]
data_NaNiO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.822
_cell_length_b   3.005
_cell_length_c   10.462
_cell_angle_alpha   90.001
_cell_angle_beta   90.001
_cell_angle_gamma   62.005
_symmetry_Int_Tables_number   1
_cell_volume   78.341
_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
  Na  Na0  1  0.688  0.632  0.250  1.0
  Na  Na1  1  0.312  0.368  0.750  1.0
  Ni  Ni2  1  0.000  0.000  0.500  1.0
  Ni  Ni3  1  1.000  1.000  1.000  1.0
  O  O4  1  0.359  0.283  0.402  1.0
  O  O5  1  0.641  0.717  0.598  1.0
  O  O6  1  0.641  0.717  0.902  1.0
  O  O7  1  0.359  0.283  0.098  1.0
[/CIF]
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