The structure described by Hg2P2S7 crystallizes in the monoclinic C2 space group. Hg(1) is bonded to one S(1), one S(2), and two equivalent S(4) atoms to form distorted HgS4 tetrahedra that share corners with two equivalent Hg(1)S4 tetrahedra and corners with four equivalent P(1)S4 tetrahedra. P(1) is bonded to one S(1), one S(2), one S(3), and one S(4) atom to form PS4 tetrahedra that share  a cornercorner with one P(1)S4 tetrahedra and corners with four equivalent Hg(1)S4 tetrahedra. There are four inequivalent S sites. In the first S site, S(1) is bonded in a water-like geometry to one Hg(1) and one P(1) atom. In the second S site, S(2) is bonded in a water-like geometry to one Hg(1) and one P(1) atom. In the third S site, S(3) is bonded in a water-like geometry to two equivalent P(1) atoms. In the fourth S site, S(4) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Hg(1) and one P(1) atom. is represented by the CIF file [CIF]
data_Hg2P2S7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.975
_cell_length_b   6.244
_cell_length_c   8.319
_cell_angle_alpha   103.005
_cell_angle_beta   90.000
_cell_angle_gamma   118.582
_symmetry_Int_Tables_number   1
_cell_volume   263.424
_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
  Hg  Hg0  1  0.786  0.571  0.797  1.0
  Hg  Hg1  1  0.215  0.429  0.203  1.0
  P  P2  1  0.910  0.826  0.293  1.0
  P  P3  1  0.084  0.174  0.707  1.0
  S  S4  1  0.201  0.947  0.764  1.0
  S  S5  1  0.254  0.053  0.236  1.0
  S  S6  1  0.893  0.521  0.351  1.0
  S  S7  1  0.372  0.479  0.649  1.0
  S  S8  1  0.788  0.000  0.500  1.0
  S  S9  1  0.626  0.743  0.113  1.0
  S  S10  1  0.883  0.257  0.887  1.0
[/CIF]
.
The structure described by Hg2P2S7 crystallizes in the monoclinic C2 space group. Hg(1) is bonded to one S(1), one S(2), and two equivalent S(4) atoms to form distorted HgS4 tetrahedra that share corners with two equivalent Hg(1)S4 tetrahedra and corners with four equivalent P(1)S4 tetrahedra. P(1) is bonded to one S(1), one S(2), one S(3), and one S(4) atom to form PS4 tetrahedra that share  a cornercorner with one P(1)S4 tetrahedra and corners with four equivalent Hg(1)S4 tetrahedra. There are four inequivalent S sites. In the first S site, S(1) is bonded in a water-like geometry to one Hg(1) and one P(1) atom. In the second S site, S(2) is bonded in a water-like geometry to one Hg(1) and one P(1) atom. In the third S site, S(3) is bonded in a water-like geometry to two equivalent P(1) atoms. In the fourth S site, S(4) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Hg(1) and one P(1) atom. is represented by the CIF file [CIF]
data_Hg2P2S7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.975
_cell_length_b   6.244
_cell_length_c   8.319
_cell_angle_alpha   103.005
_cell_angle_beta   90.000
_cell_angle_gamma   118.582
_symmetry_Int_Tables_number   1
_cell_volume   263.424
_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
  Hg  Hg0  1  0.786  0.571  0.797  1.0
  Hg  Hg1  1  0.215  0.429  0.203  1.0
  P  P2  1  0.910  0.826  0.293  1.0
  P  P3  1  0.084  0.174  0.707  1.0
  S  S4  1  0.201  0.947  0.764  1.0
  S  S5  1  0.254  0.053  0.236  1.0
  S  S6  1  0.893  0.521  0.351  1.0
  S  S7  1  0.372  0.479  0.649  1.0
  S  S8  1  0.788  0.000  0.500  1.0
  S  S9  1  0.626  0.743  0.113  1.0
  S  S10  1  0.883  0.257  0.887  1.0
[/CIF]
.