The crystal structure described by Na3Hg2 crystallizes in the tetragonal P4_2/mnm space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a distorted square co-planar geometry to four equivalent Hg(1) atoms. In the second Na site, Na(3) is bonded in a 6-coordinate geometry to six equivalent Hg(1) atoms. In the third Na site, Na(2) is bonded in a 6-coordinate geometry to six equivalent Hg(1) atoms. Hg(1) is bonded in a 10-coordinate geometry to two equivalent Na(1), three equivalent Na(2), three equivalent Na(3), and two equivalent Hg(1) atoms. is represented by the CIF file [CIF]
data_Na3Hg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.776
_cell_length_b   8.378
_cell_length_c   8.378
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   545.859
_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  0.750  0.500  0.000  1.0
  Na  Na1  1  0.250  0.500  0.000  1.0
  Na  Na2  1  0.750  0.000  0.500  1.0
  Na  Na3  1  0.250  0.000  0.500  1.0
  Na  Na4  1  0.000  0.861  0.861  1.0
  Na  Na5  1  0.500  0.639  0.361  1.0
  Na  Na6  1  0.500  0.361  0.639  1.0
  Na  Na7  1  0.000  0.139  0.139  1.0
  Na  Na8  1  0.000  0.295  0.705  1.0
  Na  Na9  1  0.500  0.795  0.795  1.0
  Na  Na10  1  0.500  0.205  0.205  1.0
  Na  Na11  1  0.000  0.705  0.295  1.0
  Hg  Hg12  1  0.809  0.627  0.627  1.0
  Hg  Hg13  1  0.809  0.373  0.373  1.0
  Hg  Hg14  1  0.309  0.127  0.873  1.0
  Hg  Hg15  1  0.309  0.873  0.127  1.0
  Hg  Hg16  1  0.191  0.627  0.627  1.0
  Hg  Hg17  1  0.691  0.873  0.127  1.0
  Hg  Hg18  1  0.691  0.127  0.873  1.0
  Hg  Hg19  1  0.191  0.373  0.373  1.0
[/CIF]
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The crystal structure described by Na3Hg2 crystallizes in the tetragonal P4_2/mnm space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a distorted square co-planar geometry to four equivalent Hg(1) atoms. In the second Na site, Na(3) is bonded in a 6-coordinate geometry to six equivalent Hg(1) atoms. In the third Na site, Na(2) is bonded in a 6-coordinate geometry to six equivalent Hg(1) atoms. Hg(1) is bonded in a 10-coordinate geometry to two equivalent Na(1), three equivalent Na(2), three equivalent Na(3), and two equivalent Hg(1) atoms. is represented by the CIF file [CIF]
data_Na3Hg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.776
_cell_length_b   8.378
_cell_length_c   8.378
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   545.859
_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  0.750  0.500  0.000  1.0
  Na  Na1  1  0.250  0.500  0.000  1.0
  Na  Na2  1  0.750  0.000  0.500  1.0
  Na  Na3  1  0.250  0.000  0.500  1.0
  Na  Na4  1  0.000  0.861  0.861  1.0
  Na  Na5  1  0.500  0.639  0.361  1.0
  Na  Na6  1  0.500  0.361  0.639  1.0
  Na  Na7  1  0.000  0.139  0.139  1.0
  Na  Na8  1  0.000  0.295  0.705  1.0
  Na  Na9  1  0.500  0.795  0.795  1.0
  Na  Na10  1  0.500  0.205  0.205  1.0
  Na  Na11  1  0.000  0.705  0.295  1.0
  Hg  Hg12  1  0.809  0.627  0.627  1.0
  Hg  Hg13  1  0.809  0.373  0.373  1.0
  Hg  Hg14  1  0.309  0.127  0.873  1.0
  Hg  Hg15  1  0.309  0.873  0.127  1.0
  Hg  Hg16  1  0.191  0.627  0.627  1.0
  Hg  Hg17  1  0.691  0.873  0.127  1.0
  Hg  Hg18  1  0.691  0.127  0.873  1.0
  Hg  Hg19  1  0.191  0.373  0.373  1.0
[/CIF]
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