The material structure described by Na2MnO2 crystallizes in the monoclinic C2/m space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a distorted trigonal planar geometry to one O(1) and two equivalent O(2) atoms. In the second Na site, Na(2) is bonded in a distorted trigonal planar geometry to one O(2) and two equivalent O(1) atoms. Mn(1) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), two equivalent Na(2), and two equivalent Mn(1) atoms to form a mixture of distorted edge and corner-sharing ONa3Mn2 trigonal bipyramids. In the second O site, O(2) is bonded to one Na(2), two equivalent Na(1), and two equivalent Mn(1) atoms to form a mixture of distorted edge and corner-sharing ONa3Mn2 trigonal bipyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2MnO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.734
_cell_length_b   6.012
_cell_length_c   5.831
_cell_angle_alpha   61.264
_cell_angle_beta   89.996
_cell_angle_gamma   61.524
_symmetry_Int_Tables_number   1
_cell_volume   147.940
_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
  Mn  Mn0  1  0.755  0.000  1.000  1.0
  Mn  Mn1  1  0.245  1.000  0.000  1.0
  Na  Na2  1  0.653  0.694  0.550  1.0
  Na  Na3  1  0.154  0.692  0.756  1.0
  Na  Na4  1  0.846  0.308  0.244  1.0
  Na  Na5  1  0.347  0.306  0.450  1.0
  O  O6  1  0.099  0.803  0.316  1.0
  O  O7  1  0.403  0.194  0.117  1.0
  O  O8  1  0.597  0.806  0.883  1.0
  O  O9  1  0.901  0.197  0.684  1.0
[/CIF]
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The material structure described by Na2MnO2 crystallizes in the monoclinic C2/m space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a distorted trigonal planar geometry to one O(1) and two equivalent O(2) atoms. In the second Na site, Na(2) is bonded in a distorted trigonal planar geometry to one O(2) and two equivalent O(1) atoms. Mn(1) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), two equivalent Na(2), and two equivalent Mn(1) atoms to form a mixture of distorted edge and corner-sharing ONa3Mn2 trigonal bipyramids. In the second O site, O(2) is bonded to one Na(2), two equivalent Na(1), and two equivalent Mn(1) atoms to form a mixture of distorted edge and corner-sharing ONa3Mn2 trigonal bipyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2MnO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.734
_cell_length_b   6.012
_cell_length_c   5.831
_cell_angle_alpha   61.264
_cell_angle_beta   89.996
_cell_angle_gamma   61.524
_symmetry_Int_Tables_number   1
_cell_volume   147.940
_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
  Mn  Mn0  1  0.755  0.000  1.000  1.0
  Mn  Mn1  1  0.245  1.000  0.000  1.0
  Na  Na2  1  0.653  0.694  0.550  1.0
  Na  Na3  1  0.154  0.692  0.756  1.0
  Na  Na4  1  0.846  0.308  0.244  1.0
  Na  Na5  1  0.347  0.306  0.450  1.0
  O  O6  1  0.099  0.803  0.316  1.0
  O  O7  1  0.403  0.194  0.117  1.0
  O  O8  1  0.597  0.806  0.883  1.0
  O  O9  1  0.901  0.197  0.684  1.0
[/CIF]
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