The compound described by Na2HgS2 crystallizes in the orthorhombic Pbca space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to two equivalent S(1) and four equivalent S(2) atoms. In the second Na site, Na(2) is bonded in a 4-coordinate geometry to one S(2) and three equivalent S(1) atoms. Hg(1) is bonded in a distorted linear geometry to one S(1) and one S(2) atom. There are two inequivalent S sites. In the first S site, S(2) is bonded in a 6-coordinate geometry to one Na(2), four equivalent Na(1), and one Hg(1) atom. In the second S site, S(1) is bonded in a 6-coordinate geometry to two equivalent Na(1), three equivalent Na(2), and one Hg(1) atom. is represented by the CIF file [CIF]
data_Na2HgS2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.302
_cell_length_b   7.466
_cell_length_c   18.115
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   987.586
_cell_formula_units_Z   8
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  0.500  0.728  0.555  1.0
  Na  Na1  1  0.000  0.272  0.945  1.0
  Na  Na2  1  1.000  0.228  0.445  1.0
  Na  Na3  1  0.500  0.772  0.055  1.0
  Na  Na4  1  0.500  0.272  0.445  1.0
  Na  Na5  1  1.000  0.728  0.055  1.0
  Na  Na6  1  0.000  0.772  0.555  1.0
  Na  Na7  1  0.500  0.228  0.945  1.0
  Na  Na8  1  0.829  0.544  0.696  1.0
  Na  Na9  1  0.329  0.456  0.804  1.0
  Na  Na10  1  0.671  0.044  0.304  1.0
  Na  Na11  1  0.171  0.956  0.196  1.0
  Na  Na12  1  0.171  0.456  0.304  1.0
  Na  Na13  1  0.671  0.544  0.196  1.0
  Na  Na14  1  0.329  0.956  0.696  1.0
  Na  Na15  1  0.829  0.044  0.804  1.0
  Hg  Hg16  1  0.274  0.349  0.111  1.0
  Hg  Hg17  1  0.774  0.651  0.389  1.0
  Hg  Hg18  1  0.226  0.849  0.889  1.0
  Hg  Hg19  1  0.726  0.651  0.889  1.0
  Hg  Hg20  1  0.226  0.349  0.611  1.0
  Hg  Hg21  1  0.774  0.151  0.111  1.0
  Hg  Hg22  1  0.274  0.849  0.389  1.0
  Hg  Hg23  1  0.726  0.151  0.611  1.0
  S  S24  1  0.698  0.886  0.679  1.0
  S  S25  1  0.302  0.614  0.179  1.0
  S  S26  1  0.802  0.386  0.321  1.0
  S  S27  1  0.802  0.886  0.179  1.0
  S  S28  1  0.198  0.114  0.821  1.0
  S  S29  1  0.302  0.114  0.321  1.0
  S  S30  1  0.698  0.386  0.821  1.0
  S  S31  1  0.198  0.614  0.679  1.0
  S  S32  1  0.256  0.076  0.549  1.0
  S  S33  1  0.756  0.924  0.951  1.0
  S  S34  1  0.244  0.576  0.451  1.0
  S  S35  1  0.744  0.424  0.049  1.0
  S  S36  1  0.744  0.924  0.451  1.0
  S  S37  1  0.244  0.076  0.049  1.0
  S  S38  1  0.756  0.424  0.549  1.0
  S  S39  1  0.256  0.576  0.951  1.0
[/CIF]
.
The compound described by Na2HgS2 crystallizes in the orthorhombic Pbca space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to two equivalent S(1) and four equivalent S(2) atoms. In the second Na site, Na(2) is bonded in a 4-coordinate geometry to one S(2) and three equivalent S(1) atoms. Hg(1) is bonded in a distorted linear geometry to one S(1) and one S(2) atom. There are two inequivalent S sites. In the first S site, S(2) is bonded in a 6-coordinate geometry to one Na(2), four equivalent Na(1), and one Hg(1) atom. In the second S site, S(1) is bonded in a 6-coordinate geometry to two equivalent Na(1), three equivalent Na(2), and one Hg(1) atom. is represented by the CIF file [CIF]
data_Na2HgS2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.302
_cell_length_b   7.466
_cell_length_c   18.115
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   987.586
_cell_formula_units_Z   8
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  0.500  0.728  0.555  1.0
  Na  Na1  1  0.000  0.272  0.945  1.0
  Na  Na2  1  1.000  0.228  0.445  1.0
  Na  Na3  1  0.500  0.772  0.055  1.0
  Na  Na4  1  0.500  0.272  0.445  1.0
  Na  Na5  1  1.000  0.728  0.055  1.0
  Na  Na6  1  0.000  0.772  0.555  1.0
  Na  Na7  1  0.500  0.228  0.945  1.0
  Na  Na8  1  0.829  0.544  0.696  1.0
  Na  Na9  1  0.329  0.456  0.804  1.0
  Na  Na10  1  0.671  0.044  0.304  1.0
  Na  Na11  1  0.171  0.956  0.196  1.0
  Na  Na12  1  0.171  0.456  0.304  1.0
  Na  Na13  1  0.671  0.544  0.196  1.0
  Na  Na14  1  0.329  0.956  0.696  1.0
  Na  Na15  1  0.829  0.044  0.804  1.0
  Hg  Hg16  1  0.274  0.349  0.111  1.0
  Hg  Hg17  1  0.774  0.651  0.389  1.0
  Hg  Hg18  1  0.226  0.849  0.889  1.0
  Hg  Hg19  1  0.726  0.651  0.889  1.0
  Hg  Hg20  1  0.226  0.349  0.611  1.0
  Hg  Hg21  1  0.774  0.151  0.111  1.0
  Hg  Hg22  1  0.274  0.849  0.389  1.0
  Hg  Hg23  1  0.726  0.151  0.611  1.0
  S  S24  1  0.698  0.886  0.679  1.0
  S  S25  1  0.302  0.614  0.179  1.0
  S  S26  1  0.802  0.386  0.321  1.0
  S  S27  1  0.802  0.886  0.179  1.0
  S  S28  1  0.198  0.114  0.821  1.0
  S  S29  1  0.302  0.114  0.321  1.0
  S  S30  1  0.698  0.386  0.821  1.0
  S  S31  1  0.198  0.614  0.679  1.0
  S  S32  1  0.256  0.076  0.549  1.0
  S  S33  1  0.756  0.924  0.951  1.0
  S  S34  1  0.244  0.576  0.451  1.0
  S  S35  1  0.744  0.424  0.049  1.0
  S  S36  1  0.744  0.924  0.451  1.0
  S  S37  1  0.244  0.076  0.049  1.0
  S  S38  1  0.756  0.424  0.549  1.0
  S  S39  1  0.256  0.576  0.951  1.0
[/CIF]
.