The structure described by K2Hg(PSe3)2 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to one Se(4), one Se(6), two equivalent Se(1), and two equivalent Se(2) atoms. In the second K site, K(2) is bonded in a 4-coordinate geometry to one Se(6), two equivalent Se(3), and two equivalent Se(5) atoms. Hg(1) is bonded to one Se(1), one Se(3), one Se(4), and one Se(6) atom to form distorted HgSe4 tetrahedra that share corners with two equivalent P(1)PSe3 tetrahedra and corners with two equivalent P(2)PSe3 tetrahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one P(1), one Se(3), one Se(5), and one Se(6) atom to form distorted PPSe3 tetrahedra that share corners with two equivalent Hg(1)Se4 tetrahedra. In the second P site, P(2) is bonded to one P(2), one Se(1), one Se(2), and one Se(4) atom to form distorted PPSe3 tetrahedra that share corners with two equivalent Hg(1)Se4 tetrahedra and  a cornercorner with one Se(1)K2HgP trigonal pyramid. There are six inequivalent Se sites. In the first Se site, Se(1) is bonded to two equivalent K(1), one Hg(1), and one P(2) atom to form distorted SeK2HgP trigonal pyramids that share  a cornercorner with one P(2)PSe3 tetrahedra and  an edgeedge with one Se(1)K2HgP trigonal pyramid. In the second Se site, Se(2) is bonded in a 3-coordinate geometry to two equivalent K(1) and one P(2) atom. In the third Se site, Se(3) is bonded in a distorted rectangular see-saw-like geometry to two equivalent K(2), one Hg(1), and one P(1) atom. In the fourth Se site, Se(4) is bonded in a 3-coordinate geometry to one K(1), one Hg(1), and one P(2) atom. In the fifth Se site, Se(5) is bonded in a distorted trigonal non-coplanar geometry to two equivalent K(2) and one P(1) atom. In the sixth Se site, Se(6) is bonded in a 4-coordinate geometry to one K(1), one K(2), one Hg(1), and one P(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2Hg(PSe3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.446
_cell_length_b   13.313
_cell_length_c   14.593
_cell_angle_alpha   69.570
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1355.568
_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
  K  K0  1  0.554  0.401  0.216  1.0
  K  K1  1  0.960  0.098  0.621  1.0
  K  K2  1  0.946  0.401  0.716  1.0
  K  K3  1  0.040  0.902  0.379  1.0
  K  K4  1  0.054  0.599  0.284  1.0
  K  K5  1  0.446  0.599  0.784  1.0
  K  K6  1  0.460  0.902  0.879  1.0
  K  K7  1  0.540  0.098  0.121  1.0
  Hg  Hg8  1  0.608  0.742  0.522  1.0
  Hg  Hg9  1  0.892  0.742  0.022  1.0
  Hg  Hg10  1  0.392  0.258  0.478  1.0
  Hg  Hg11  1  0.108  0.258  0.978  1.0
  P  P12  1  0.037  0.961  0.082  1.0
  P  P13  1  0.612  0.518  0.441  1.0
  P  P14  1  0.112  0.482  0.059  1.0
  P  P15  1  0.388  0.482  0.559  1.0
  P  P16  1  0.963  0.039  0.918  1.0
  P  P17  1  0.463  0.961  0.582  1.0
  P  P18  1  0.537  0.039  0.418  1.0
  P  P19  1  0.888  0.518  0.941  1.0
  Se  Se20  1  0.169  0.402  0.502  1.0
  Se  Se21  1  0.011  0.383  0.201  1.0
  Se  Se22  1  0.991  0.910  0.855  1.0
  Se  Se23  1  0.009  0.090  0.145  1.0
  Se  Se24  1  0.720  0.360  0.446  1.0
  Se  Se25  1  0.198  0.888  0.602  1.0
  Se  Se26  1  0.831  0.598  0.498  1.0
  Se  Se27  1  0.815  0.843  0.148  1.0
  Se  Se28  1  0.802  0.112  0.398  1.0
  Se  Se29  1  0.989  0.617  0.799  1.0
  Se  Se30  1  0.331  0.402  0.002  1.0
  Se  Se31  1  0.302  0.888  0.102  1.0
  Se  Se32  1  0.685  0.843  0.648  1.0
  Se  Se33  1  0.315  0.157  0.352  1.0
  Se  Se34  1  0.669  0.598  0.998  1.0
  Se  Se35  1  0.511  0.617  0.299  1.0
  Se  Se36  1  0.491  0.090  0.645  1.0
  Se  Se37  1  0.489  0.383  0.701  1.0
  Se  Se38  1  0.185  0.157  0.852  1.0
  Se  Se39  1  0.509  0.910  0.355  1.0
  Se  Se40  1  0.220  0.640  0.054  1.0
  Se  Se41  1  0.280  0.640  0.554  1.0
  Se  Se42  1  0.698  0.112  0.898  1.0
  Se  Se43  1  0.780  0.360  0.946  1.0
[/CIF]
.
The structure described by K2Hg(PSe3)2 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to one Se(4), one Se(6), two equivalent Se(1), and two equivalent Se(2) atoms. In the second K site, K(2) is bonded in a 4-coordinate geometry to one Se(6), two equivalent Se(3), and two equivalent Se(5) atoms. Hg(1) is bonded to one Se(1), one Se(3), one Se(4), and one Se(6) atom to form distorted HgSe4 tetrahedra that share corners with two equivalent P(1)PSe3 tetrahedra and corners with two equivalent P(2)PSe3 tetrahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one P(1), one Se(3), one Se(5), and one Se(6) atom to form distorted PPSe3 tetrahedra that share corners with two equivalent Hg(1)Se4 tetrahedra. In the second P site, P(2) is bonded to one P(2), one Se(1), one Se(2), and one Se(4) atom to form distorted PPSe3 tetrahedra that share corners with two equivalent Hg(1)Se4 tetrahedra and  a cornercorner with one Se(1)K2HgP trigonal pyramid. There are six inequivalent Se sites. In the first Se site, Se(1) is bonded to two equivalent K(1), one Hg(1), and one P(2) atom to form distorted SeK2HgP trigonal pyramids that share  a cornercorner with one P(2)PSe3 tetrahedra and  an edgeedge with one Se(1)K2HgP trigonal pyramid. In the second Se site, Se(2) is bonded in a 3-coordinate geometry to two equivalent K(1) and one P(2) atom. In the third Se site, Se(3) is bonded in a distorted rectangular see-saw-like geometry to two equivalent K(2), one Hg(1), and one P(1) atom. In the fourth Se site, Se(4) is bonded in a 3-coordinate geometry to one K(1), one Hg(1), and one P(2) atom. In the fifth Se site, Se(5) is bonded in a distorted trigonal non-coplanar geometry to two equivalent K(2) and one P(1) atom. In the sixth Se site, Se(6) is bonded in a 4-coordinate geometry to one K(1), one K(2), one Hg(1), and one P(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2Hg(PSe3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.446
_cell_length_b   13.313
_cell_length_c   14.593
_cell_angle_alpha   69.570
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1355.568
_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
  K  K0  1  0.554  0.401  0.216  1.0
  K  K1  1  0.960  0.098  0.621  1.0
  K  K2  1  0.946  0.401  0.716  1.0
  K  K3  1  0.040  0.902  0.379  1.0
  K  K4  1  0.054  0.599  0.284  1.0
  K  K5  1  0.446  0.599  0.784  1.0
  K  K6  1  0.460  0.902  0.879  1.0
  K  K7  1  0.540  0.098  0.121  1.0
  Hg  Hg8  1  0.608  0.742  0.522  1.0
  Hg  Hg9  1  0.892  0.742  0.022  1.0
  Hg  Hg10  1  0.392  0.258  0.478  1.0
  Hg  Hg11  1  0.108  0.258  0.978  1.0
  P  P12  1  0.037  0.961  0.082  1.0
  P  P13  1  0.612  0.518  0.441  1.0
  P  P14  1  0.112  0.482  0.059  1.0
  P  P15  1  0.388  0.482  0.559  1.0
  P  P16  1  0.963  0.039  0.918  1.0
  P  P17  1  0.463  0.961  0.582  1.0
  P  P18  1  0.537  0.039  0.418  1.0
  P  P19  1  0.888  0.518  0.941  1.0
  Se  Se20  1  0.169  0.402  0.502  1.0
  Se  Se21  1  0.011  0.383  0.201  1.0
  Se  Se22  1  0.991  0.910  0.855  1.0
  Se  Se23  1  0.009  0.090  0.145  1.0
  Se  Se24  1  0.720  0.360  0.446  1.0
  Se  Se25  1  0.198  0.888  0.602  1.0
  Se  Se26  1  0.831  0.598  0.498  1.0
  Se  Se27  1  0.815  0.843  0.148  1.0
  Se  Se28  1  0.802  0.112  0.398  1.0
  Se  Se29  1  0.989  0.617  0.799  1.0
  Se  Se30  1  0.331  0.402  0.002  1.0
  Se  Se31  1  0.302  0.888  0.102  1.0
  Se  Se32  1  0.685  0.843  0.648  1.0
  Se  Se33  1  0.315  0.157  0.352  1.0
  Se  Se34  1  0.669  0.598  0.998  1.0
  Se  Se35  1  0.511  0.617  0.299  1.0
  Se  Se36  1  0.491  0.090  0.645  1.0
  Se  Se37  1  0.489  0.383  0.701  1.0
  Se  Se38  1  0.185  0.157  0.852  1.0
  Se  Se39  1  0.509  0.910  0.355  1.0
  Se  Se40  1  0.220  0.640  0.054  1.0
  Se  Se41  1  0.280  0.640  0.554  1.0
  Se  Se42  1  0.698  0.112  0.898  1.0
  Se  Se43  1  0.780  0.360  0.946  1.0
[/CIF]
.