The structure described by NaMnO2 crystallizes in the orthorhombic Pnma space group. Na(1) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form NaO6 octahedra that share corners with four equivalent Na(1)O6 octahedra, corners with ten equivalent Mn(1)O5 square pyramids, edges with four equivalent Na(1)O6 octahedra,  an edgeedge with one Mn(1)O5 square pyramid, and  a faceface with one Mn(1)O5 square pyramid. The corner-sharing octahedral tilt angles are 53°. Mn(1) is bonded to two equivalent O(1) and three equivalent O(2) atoms to form distorted MnO5 square pyramids that share corners with ten equivalent Na(1)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra, edges with four equivalent Mn(1)O5 square pyramids, and  a faceface with one Na(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-82°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to three equivalent Na(1) and two equivalent Mn(1) atoms. In the second O site, O(2) is bonded in a 6-coordinate geometry to three equivalent Na(1) and three equivalent Mn(1) atoms. is represented by the CIF file [CIF]
data_NaMnO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.900
_cell_length_b   5.697
_cell_length_c   11.500
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   190.030
_cell_formula_units_Z   4
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  0.250  0.031  0.625  1.0
  Na  Na1  1  0.250  0.469  0.125  1.0
  Na  Na2  1  0.750  0.969  0.375  1.0
  Na  Na3  1  0.750  0.531  0.875  1.0
  Mn  Mn4  1  0.250  0.525  0.620  1.0
  Mn  Mn5  1  0.750  0.475  0.380  1.0
  Mn  Mn6  1  0.750  0.025  0.880  1.0
  Mn  Mn7  1  0.250  0.975  0.120  1.0
  O  O8  1  0.750  0.346  0.691  1.0
  O  O9  1  0.250  0.654  0.309  1.0
  O  O10  1  0.250  0.846  0.809  1.0
  O  O11  1  0.750  0.154  0.191  1.0
  O  O12  1  0.750  0.714  0.552  1.0
  O  O13  1  0.250  0.286  0.448  1.0
  O  O14  1  0.750  0.786  0.052  1.0
  O  O15  1  0.250  0.214  0.948  1.0
[/CIF]
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The structure described by NaMnO2 crystallizes in the orthorhombic Pnma space group. Na(1) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form NaO6 octahedra that share corners with four equivalent Na(1)O6 octahedra, corners with ten equivalent Mn(1)O5 square pyramids, edges with four equivalent Na(1)O6 octahedra,  an edgeedge with one Mn(1)O5 square pyramid, and  a faceface with one Mn(1)O5 square pyramid. The corner-sharing octahedral tilt angles are 53°. Mn(1) is bonded to two equivalent O(1) and three equivalent O(2) atoms to form distorted MnO5 square pyramids that share corners with ten equivalent Na(1)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra, edges with four equivalent Mn(1)O5 square pyramids, and  a faceface with one Na(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-82°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to three equivalent Na(1) and two equivalent Mn(1) atoms. In the second O site, O(2) is bonded in a 6-coordinate geometry to three equivalent Na(1) and three equivalent Mn(1) atoms. is represented by the CIF file [CIF]
data_NaMnO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.900
_cell_length_b   5.697
_cell_length_c   11.500
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   190.030
_cell_formula_units_Z   4
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  0.250  0.031  0.625  1.0
  Na  Na1  1  0.250  0.469  0.125  1.0
  Na  Na2  1  0.750  0.969  0.375  1.0
  Na  Na3  1  0.750  0.531  0.875  1.0
  Mn  Mn4  1  0.250  0.525  0.620  1.0
  Mn  Mn5  1  0.750  0.475  0.380  1.0
  Mn  Mn6  1  0.750  0.025  0.880  1.0
  Mn  Mn7  1  0.250  0.975  0.120  1.0
  O  O8  1  0.750  0.346  0.691  1.0
  O  O9  1  0.250  0.654  0.309  1.0
  O  O10  1  0.250  0.846  0.809  1.0
  O  O11  1  0.750  0.154  0.191  1.0
  O  O12  1  0.750  0.714  0.552  1.0
  O  O13  1  0.250  0.286  0.448  1.0
  O  O14  1  0.750  0.786  0.052  1.0
  O  O15  1  0.250  0.214  0.948  1.0
[/CIF]
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