The crystal structure described by Na2HgO2 crystallizes in the tetragonal I4/mmm space group. Na(1) is bonded to five equivalent O(1) atoms to form a mixture of corner and edge-sharing NaO5 square pyramids. Hg(1) is bonded in a linear geometry to two equivalent O(1) atoms. O(1) is bonded to five equivalent Na(1) and one Hg(1) atom to form a mixture of corner and edge-sharing ONa5Hg octahedra. The corner-sharing octahedral tilt angles range from 0-18°. is represented by the CIF card [CIF]
data_Na2HgO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.380
_cell_length_b   3.380
_cell_length_c   7.087
_cell_angle_alpha   103.796
_cell_angle_beta   103.796
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   76.230
_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  0.678  0.678  0.355  1.0
  Na  Na1  1  0.322  0.322  0.645  1.0
  Hg  Hg2  1  0.000  0.000  0.000  1.0
  O  O3  1  0.850  0.850  0.701  1.0
  O  O4  1  0.150  0.150  0.299  1.0
[/CIF]
.
The crystal structure described by Na2HgO2 crystallizes in the tetragonal I4/mmm space group. Na(1) is bonded to five equivalent O(1) atoms to form a mixture of corner and edge-sharing NaO5 square pyramids. Hg(1) is bonded in a linear geometry to two equivalent O(1) atoms. O(1) is bonded to five equivalent Na(1) and one Hg(1) atom to form a mixture of corner and edge-sharing ONa5Hg octahedra. The corner-sharing octahedral tilt angles range from 0-18°. is represented by the CIF card [CIF]
data_Na2HgO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.380
_cell_length_b   3.380
_cell_length_c   7.087
_cell_angle_alpha   103.796
_cell_angle_beta   103.796
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   76.230
_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  0.678  0.678  0.355  1.0
  Na  Na1  1  0.322  0.322  0.645  1.0
  Hg  Hg2  1  0.000  0.000  0.000  1.0
  O  O3  1  0.850  0.850  0.701  1.0
  O  O4  1  0.150  0.150  0.299  1.0
[/CIF]
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