The crystal structure described by Na2O crystallizes in the hexagonal P-62m space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(2) and four equivalent O(1) atoms to form distorted NaO5 square pyramids that share corners with ten equivalent Na(1)O5 square pyramids, corners with six equivalent Na(2)O4 tetrahedra, edges with six equivalent Na(1)O5 square pyramids, and edges with six equivalent Na(2)O4 tetrahedra. In the second Na site, Na(2) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form distorted NaO4 tetrahedra that share corners with six equivalent Na(1)O5 square pyramids, corners with ten equivalent Na(2)O4 tetrahedra, edges with six equivalent Na(1)O5 square pyramids, and edges with two equivalent Na(2)O4 tetrahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 9-coordinate geometry to three equivalent Na(2) and six equivalent Na(1) atoms. In the second O site, O(2) is bonded in a 9-coordinate geometry to three equivalent Na(1) and six equivalent Na(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2O
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.056
_cell_length_b   6.056
_cell_length_c   3.566
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   113.271
_cell_formula_units_Z   3
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  0.415  0.000  0.000  1.0
  Na  Na1  1  0.259  0.259  0.500  1.0
  Na  Na2  1  0.000  0.741  0.500  1.0
  Na  Na3  1  0.000  0.415  0.000  1.0
  Na  Na4  1  0.741  0.000  0.500  1.0
  Na  Na5  1  0.585  0.585  0.000  1.0
  O  O6  1  0.333  0.667  0.500  1.0
  O  O7  1  0.000  0.000  0.000  1.0
  O  O8  1  0.667  0.333  0.500  1.0
[/CIF]
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The crystal structure described by Na2O crystallizes in the hexagonal P-62m space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(2) and four equivalent O(1) atoms to form distorted NaO5 square pyramids that share corners with ten equivalent Na(1)O5 square pyramids, corners with six equivalent Na(2)O4 tetrahedra, edges with six equivalent Na(1)O5 square pyramids, and edges with six equivalent Na(2)O4 tetrahedra. In the second Na site, Na(2) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form distorted NaO4 tetrahedra that share corners with six equivalent Na(1)O5 square pyramids, corners with ten equivalent Na(2)O4 tetrahedra, edges with six equivalent Na(1)O5 square pyramids, and edges with two equivalent Na(2)O4 tetrahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 9-coordinate geometry to three equivalent Na(2) and six equivalent Na(1) atoms. In the second O site, O(2) is bonded in a 9-coordinate geometry to three equivalent Na(1) and six equivalent Na(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2O
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.056
_cell_length_b   6.056
_cell_length_c   3.566
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   113.271
_cell_formula_units_Z   3
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  0.415  0.000  0.000  1.0
  Na  Na1  1  0.259  0.259  0.500  1.0
  Na  Na2  1  0.000  0.741  0.500  1.0
  Na  Na3  1  0.000  0.415  0.000  1.0
  Na  Na4  1  0.741  0.000  0.500  1.0
  Na  Na5  1  0.585  0.585  0.000  1.0
  O  O6  1  0.333  0.667  0.500  1.0
  O  O7  1  0.000  0.000  0.000  1.0
  O  O8  1  0.667  0.333  0.500  1.0
[/CIF]
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