The compound described by Na2CuO2 is Ilmenite-like structured and crystallizes in the orthorhombic Immm space group. Na(1) is bonded to four equivalent O(1) atoms to form a mixture of distorted corner and edge-sharing NaO4 trigonal pyramids. Cu(1) is bonded in a square co-planar geometry to four equivalent O(1) atoms. O(1) is bonded to four equivalent Na(1) and two equivalent Cu(1) atoms to form a mixture of corner and edge-sharing ONa4Cu2 octahedra. The corner-sharing octahedral tilt angles range from 0-28°. is represented by the CIF file [CIF]
data_Na2CuO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.672
_cell_length_b   5.672
_cell_length_c   5.672
_cell_angle_alpha   149.310
_cell_angle_beta   132.965
_cell_angle_gamma   57.215
_symmetry_Int_Tables_number   1
_cell_volume   67.677
_cell_formula_units_Z   1
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  0.188  0.688  0.500  1.0
  Na  Na1  1  0.812  0.312  0.500  1.0
  Cu  Cu2  1  0.500  0.000  0.500  1.0
  O  O3  1  0.367  0.367  0.000  1.0
  O  O4  1  0.633  0.633  0.000  1.0
[/CIF]
.
The compound described by Na2CuO2 is Ilmenite-like structured and crystallizes in the orthorhombic Immm space group. Na(1) is bonded to four equivalent O(1) atoms to form a mixture of distorted corner and edge-sharing NaO4 trigonal pyramids. Cu(1) is bonded in a square co-planar geometry to four equivalent O(1) atoms. O(1) is bonded to four equivalent Na(1) and two equivalent Cu(1) atoms to form a mixture of corner and edge-sharing ONa4Cu2 octahedra. The corner-sharing octahedral tilt angles range from 0-28°. is represented by the CIF file [CIF]
data_Na2CuO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.672
_cell_length_b   5.672
_cell_length_c   5.672
_cell_angle_alpha   149.310
_cell_angle_beta   132.965
_cell_angle_gamma   57.215
_symmetry_Int_Tables_number   1
_cell_volume   67.677
_cell_formula_units_Z   1
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  0.188  0.688  0.500  1.0
  Na  Na1  1  0.812  0.312  0.500  1.0
  Cu  Cu2  1  0.500  0.000  0.500  1.0
  O  O3  1  0.367  0.367  0.000  1.0
  O  O4  1  0.633  0.633  0.000  1.0
[/CIF]
.