The structure described by KY(PSe3)2 is Zircon-derived structured and crystallizes in the orthorhombic P2_12_12_1 space group. K(1) is bonded in a 7-coordinate geometry to one Se(3), one Se(4), two equivalent Se(5), and three equivalent Se(2) atoms. Y(1) is bonded in a 8-coordinate geometry to one Se(3), one Se(5), two equivalent Se(1), two equivalent Se(4), and two equivalent Se(6) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded to one P(2), one Se(2), one Se(5), and one Se(6) atom to form distorted PPSe3 tetrahedra that share  a cornercorner with one Se(4)KY2P tetrahedra. In the second P site, P(2) is bonded in a distorted tetrahedral geometry to one P(1), one Se(1), one Se(3), and one Se(4) atom. There are six inequivalent Se sites. In the first Se site, Se(1) is bonded in a distorted T-shaped geometry to two equivalent Y(1) and one P(2) atom. In the second Se site, Se(2) is bonded in a 4-coordinate geometry to three equivalent K(1) and one P(1) atom. In the third Se site, Se(3) is bonded in a 3-coordinate geometry to one K(1), one Y(1), and one P(2) atom. In the fourth Se site, Se(4) is bonded to one K(1), two equivalent Y(1), and one P(2) atom to form distorted SeKY2P tetrahedra that share  a cornercorner with one P(1)PSe3 tetrahedra and corners with two equivalent Se(4)KY2P tetrahedra. In the fifth Se site, Se(5) is bonded in a distorted rectangular see-saw-like geometry to two equivalent K(1), one Y(1), and one P(1) atom. In the sixth Se site, Se(6) is bonded in a trigonal non-coplanar geometry to two equivalent Y(1) and one P(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_KY(PSe3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.849
_cell_length_b   7.550
_cell_length_c   21.871
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1130.999
_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  0.124  0.519  0.496  1.0
  K  K1  1  0.376  0.481  0.996  1.0
  K  K2  1  0.624  0.981  0.504  1.0
  K  K3  1  0.876  0.019  0.004  1.0
  Y  Y4  1  0.717  0.819  0.749  1.0
  Y  Y5  1  0.217  0.681  0.251  1.0
  Y  Y6  1  0.783  0.181  0.249  1.0
  Y  Y7  1  0.283  0.319  0.751  1.0
  P  P8  1  0.824  0.448  0.110  1.0
  P  P9  1  0.308  0.171  0.334  1.0
  P  P10  1  0.808  0.329  0.666  1.0
  P  P11  1  0.176  0.948  0.390  1.0
  P  P12  1  0.192  0.829  0.834  1.0
  P  P13  1  0.692  0.671  0.166  1.0
  P  P14  1  0.676  0.552  0.610  1.0
  P  P15  1  0.324  0.052  0.890  1.0
  Se  Se16  1  0.630  0.549  0.257  1.0
  Se  Se17  1  0.881  0.540  0.018  1.0
  Se  Se18  1  0.912  0.737  0.871  1.0
  Se  Se19  1  0.130  0.951  0.743  1.0
  Se  Se20  1  0.119  0.040  0.482  1.0
  Se  Se21  1  0.088  0.237  0.629  1.0
  Se  Se22  1  0.567  0.128  0.669  1.0
  Se  Se23  1  0.889  0.766  0.620  1.0
  Se  Se24  1  0.075  0.368  0.170  1.0
  Se  Se25  1  0.575  0.132  0.830  1.0
  Se  Se26  1  0.619  0.460  0.518  1.0
  Se  Se27  1  0.389  0.734  0.380  1.0
  Se  Se28  1  0.425  0.632  0.670  1.0
  Se  Se29  1  0.433  0.628  0.831  1.0
  Se  Se30  1  0.370  0.049  0.243  1.0
  Se  Se31  1  0.870  0.451  0.757  1.0
  Se  Se32  1  0.111  0.266  0.880  1.0
  Se  Se33  1  0.925  0.868  0.330  1.0
  Se  Se34  1  0.933  0.872  0.169  1.0
  Se  Se35  1  0.611  0.234  0.120  1.0
  Se  Se36  1  0.588  0.263  0.371  1.0
  Se  Se37  1  0.412  0.763  0.129  1.0
  Se  Se38  1  0.381  0.960  0.982  1.0
  Se  Se39  1  0.067  0.372  0.331  1.0
[/CIF]
.
The structure described by KY(PSe3)2 is Zircon-derived structured and crystallizes in the orthorhombic P2_12_12_1 space group. K(1) is bonded in a 7-coordinate geometry to one Se(3), one Se(4), two equivalent Se(5), and three equivalent Se(2) atoms. Y(1) is bonded in a 8-coordinate geometry to one Se(3), one Se(5), two equivalent Se(1), two equivalent Se(4), and two equivalent Se(6) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded to one P(2), one Se(2), one Se(5), and one Se(6) atom to form distorted PPSe3 tetrahedra that share  a cornercorner with one Se(4)KY2P tetrahedra. In the second P site, P(2) is bonded in a distorted tetrahedral geometry to one P(1), one Se(1), one Se(3), and one Se(4) atom. There are six inequivalent Se sites. In the first Se site, Se(1) is bonded in a distorted T-shaped geometry to two equivalent Y(1) and one P(2) atom. In the second Se site, Se(2) is bonded in a 4-coordinate geometry to three equivalent K(1) and one P(1) atom. In the third Se site, Se(3) is bonded in a 3-coordinate geometry to one K(1), one Y(1), and one P(2) atom. In the fourth Se site, Se(4) is bonded to one K(1), two equivalent Y(1), and one P(2) atom to form distorted SeKY2P tetrahedra that share  a cornercorner with one P(1)PSe3 tetrahedra and corners with two equivalent Se(4)KY2P tetrahedra. In the fifth Se site, Se(5) is bonded in a distorted rectangular see-saw-like geometry to two equivalent K(1), one Y(1), and one P(1) atom. In the sixth Se site, Se(6) is bonded in a trigonal non-coplanar geometry to two equivalent Y(1) and one P(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_KY(PSe3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.849
_cell_length_b   7.550
_cell_length_c   21.871
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1130.999
_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  0.124  0.519  0.496  1.0
  K  K1  1  0.376  0.481  0.996  1.0
  K  K2  1  0.624  0.981  0.504  1.0
  K  K3  1  0.876  0.019  0.004  1.0
  Y  Y4  1  0.717  0.819  0.749  1.0
  Y  Y5  1  0.217  0.681  0.251  1.0
  Y  Y6  1  0.783  0.181  0.249  1.0
  Y  Y7  1  0.283  0.319  0.751  1.0
  P  P8  1  0.824  0.448  0.110  1.0
  P  P9  1  0.308  0.171  0.334  1.0
  P  P10  1  0.808  0.329  0.666  1.0
  P  P11  1  0.176  0.948  0.390  1.0
  P  P12  1  0.192  0.829  0.834  1.0
  P  P13  1  0.692  0.671  0.166  1.0
  P  P14  1  0.676  0.552  0.610  1.0
  P  P15  1  0.324  0.052  0.890  1.0
  Se  Se16  1  0.630  0.549  0.257  1.0
  Se  Se17  1  0.881  0.540  0.018  1.0
  Se  Se18  1  0.912  0.737  0.871  1.0
  Se  Se19  1  0.130  0.951  0.743  1.0
  Se  Se20  1  0.119  0.040  0.482  1.0
  Se  Se21  1  0.088  0.237  0.629  1.0
  Se  Se22  1  0.567  0.128  0.669  1.0
  Se  Se23  1  0.889  0.766  0.620  1.0
  Se  Se24  1  0.075  0.368  0.170  1.0
  Se  Se25  1  0.575  0.132  0.830  1.0
  Se  Se26  1  0.619  0.460  0.518  1.0
  Se  Se27  1  0.389  0.734  0.380  1.0
  Se  Se28  1  0.425  0.632  0.670  1.0
  Se  Se29  1  0.433  0.628  0.831  1.0
  Se  Se30  1  0.370  0.049  0.243  1.0
  Se  Se31  1  0.870  0.451  0.757  1.0
  Se  Se32  1  0.111  0.266  0.880  1.0
  Se  Se33  1  0.925  0.868  0.330  1.0
  Se  Se34  1  0.933  0.872  0.169  1.0
  Se  Se35  1  0.611  0.234  0.120  1.0
  Se  Se36  1  0.588  0.263  0.371  1.0
  Se  Se37  1  0.412  0.763  0.129  1.0
  Se  Se38  1  0.381  0.960  0.982  1.0
  Se  Se39  1  0.067  0.372  0.331  1.0
[/CIF]
.