The structure described by K2LaP2Se7 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(1), one Se(2), one Se(5), one Se(7), and two equivalent Se(6) atoms. In the second K site, K(2) is bonded in a 9-coordinate geometry to one P(2), one Se(1), one Se(2), one Se(3), one Se(5), one Se(6), one Se(7), and two equivalent Se(4) atoms. La(1) is bonded in a 8-coordinate geometry to one Se(1), one Se(2), one Se(4), one Se(5), one Se(6), one Se(7), and two equivalent Se(3) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded in a tetrahedral geometry to one Se(2), one Se(3), one Se(4), and one Se(7) atom. In the second P site, P(2) is bonded in a 3-coordinate geometry to one K(2), one Se(1), one Se(5), and one Se(6) atom. There are seven inequivalent Se sites. In the first Se site, Se(4) is bonded in a distorted see-saw-like geometry to two equivalent K(2), one La(1), and one P(1) atom. In the second Se site, Se(5) is bonded in a 4-coordinate geometry to one K(1), one K(2), one La(1), and one P(2) atom. In the third Se site, Se(6) is bonded in a 5-coordinate geometry to one K(2), two equivalent K(1), one La(1), and one P(2) atom. In the fourth Se site, Se(7) is bonded in a 4-coordinate geometry to one K(1), one K(2), one La(1), and one P(1) atom. In the fifth Se site, Se(1) is bonded in a 3-coordinate geometry to one K(1), one K(2), one La(1), and one P(2) atom. In the sixth Se site, Se(2) is bonded in a 4-coordinate geometry to one K(1), one K(2), one La(1), and one P(1) atom. In the seventh Se site, Se(3) is bonded in a distorted see-saw-like geometry to one K(2), two equivalent La(1), and one P(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2LaP2Se7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.343
_cell_length_b   9.614
_cell_length_c   22.329
_cell_angle_alpha   71.160
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1491.897
_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  0.510  0.753  0.491  1.0
  K  K1  1  0.010  0.247  0.009  1.0
  K  K2  1  0.490  0.247  0.509  1.0
  K  K3  1  0.990  0.753  0.991  1.0
  K  K4  1  0.049  0.842  0.317  1.0
  K  K5  1  0.549  0.158  0.183  1.0
  K  K6  1  0.951  0.158  0.683  1.0
  K  K7  1  0.451  0.842  0.817  1.0
  La  La8  1  0.971  0.345  0.350  1.0
  La  La9  1  0.471  0.655  0.150  1.0
  La  La10  1  0.029  0.655  0.650  1.0
  La  La11  1  0.529  0.345  0.850  1.0
  P  P12  1  0.516  0.574  0.330  1.0
  P  P13  1  0.016  0.426  0.170  1.0
  P  P14  1  0.484  0.426  0.670  1.0
  P  P15  1  0.984  0.574  0.830  1.0
  P  P16  1  0.989  0.038  0.543  1.0
  P  P17  1  0.489  0.962  0.957  1.0
  P  P18  1  0.011  0.962  0.457  1.0
  P  P19  1  0.511  0.038  0.043  1.0
  Se  Se20  1  0.956  0.278  0.503  1.0
  Se  Se21  1  0.456  0.722  0.997  1.0
  Se  Se22  1  0.044  0.722  0.497  1.0
  Se  Se23  1  0.544  0.278  0.003  1.0
  Se  Se24  1  0.277  0.513  0.395  1.0
  Se  Se25  1  0.777  0.487  0.105  1.0
  Se  Se26  1  0.723  0.487  0.605  1.0
  Se  Se27  1  0.223  0.513  0.895  1.0
  Se  Se28  1  0.588  0.413  0.280  1.0
  Se  Se29  1  0.088  0.587  0.220  1.0
  Se  Se30  1  0.412  0.587  0.720  1.0
  Se  Se31  1  0.912  0.413  0.780  1.0
  Se  Se32  1  0.967  0.209  0.244  1.0
  Se  Se33  1  0.467  0.791  0.256  1.0
  Se  Se34  1  0.033  0.791  0.756  1.0
  Se  Se35  1  0.533  0.209  0.744  1.0
  Se  Se36  1  0.764  0.043  0.400  1.0
  Se  Se37  1  0.264  0.957  0.100  1.0
  Se  Se38  1  0.236  0.957  0.600  1.0
  Se  Se39  1  0.736  0.043  0.900  1.0
  Se  Se40  1  0.249  0.077  0.403  1.0
  Se  Se41  1  0.749  0.923  0.097  1.0
  Se  Se42  1  0.751  0.923  0.597  1.0
  Se  Se43  1  0.251  0.077  0.903  1.0
  Se  Se44  1  0.753  0.579  0.392  1.0
  Se  Se45  1  0.253  0.421  0.108  1.0
  Se  Se46  1  0.247  0.421  0.608  1.0
  Se  Se47  1  0.747  0.579  0.892  1.0
[/CIF]
.
The structure described by K2LaP2Se7 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(1), one Se(2), one Se(5), one Se(7), and two equivalent Se(6) atoms. In the second K site, K(2) is bonded in a 9-coordinate geometry to one P(2), one Se(1), one Se(2), one Se(3), one Se(5), one Se(6), one Se(7), and two equivalent Se(4) atoms. La(1) is bonded in a 8-coordinate geometry to one Se(1), one Se(2), one Se(4), one Se(5), one Se(6), one Se(7), and two equivalent Se(3) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded in a tetrahedral geometry to one Se(2), one Se(3), one Se(4), and one Se(7) atom. In the second P site, P(2) is bonded in a 3-coordinate geometry to one K(2), one Se(1), one Se(5), and one Se(6) atom. There are seven inequivalent Se sites. In the first Se site, Se(4) is bonded in a distorted see-saw-like geometry to two equivalent K(2), one La(1), and one P(1) atom. In the second Se site, Se(5) is bonded in a 4-coordinate geometry to one K(1), one K(2), one La(1), and one P(2) atom. In the third Se site, Se(6) is bonded in a 5-coordinate geometry to one K(2), two equivalent K(1), one La(1), and one P(2) atom. In the fourth Se site, Se(7) is bonded in a 4-coordinate geometry to one K(1), one K(2), one La(1), and one P(1) atom. In the fifth Se site, Se(1) is bonded in a 3-coordinate geometry to one K(1), one K(2), one La(1), and one P(2) atom. In the sixth Se site, Se(2) is bonded in a 4-coordinate geometry to one K(1), one K(2), one La(1), and one P(1) atom. In the seventh Se site, Se(3) is bonded in a distorted see-saw-like geometry to one K(2), two equivalent La(1), and one P(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2LaP2Se7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.343
_cell_length_b   9.614
_cell_length_c   22.329
_cell_angle_alpha   71.160
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1491.897
_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  0.510  0.753  0.491  1.0
  K  K1  1  0.010  0.247  0.009  1.0
  K  K2  1  0.490  0.247  0.509  1.0
  K  K3  1  0.990  0.753  0.991  1.0
  K  K4  1  0.049  0.842  0.317  1.0
  K  K5  1  0.549  0.158  0.183  1.0
  K  K6  1  0.951  0.158  0.683  1.0
  K  K7  1  0.451  0.842  0.817  1.0
  La  La8  1  0.971  0.345  0.350  1.0
  La  La9  1  0.471  0.655  0.150  1.0
  La  La10  1  0.029  0.655  0.650  1.0
  La  La11  1  0.529  0.345  0.850  1.0
  P  P12  1  0.516  0.574  0.330  1.0
  P  P13  1  0.016  0.426  0.170  1.0
  P  P14  1  0.484  0.426  0.670  1.0
  P  P15  1  0.984  0.574  0.830  1.0
  P  P16  1  0.989  0.038  0.543  1.0
  P  P17  1  0.489  0.962  0.957  1.0
  P  P18  1  0.011  0.962  0.457  1.0
  P  P19  1  0.511  0.038  0.043  1.0
  Se  Se20  1  0.956  0.278  0.503  1.0
  Se  Se21  1  0.456  0.722  0.997  1.0
  Se  Se22  1  0.044  0.722  0.497  1.0
  Se  Se23  1  0.544  0.278  0.003  1.0
  Se  Se24  1  0.277  0.513  0.395  1.0
  Se  Se25  1  0.777  0.487  0.105  1.0
  Se  Se26  1  0.723  0.487  0.605  1.0
  Se  Se27  1  0.223  0.513  0.895  1.0
  Se  Se28  1  0.588  0.413  0.280  1.0
  Se  Se29  1  0.088  0.587  0.220  1.0
  Se  Se30  1  0.412  0.587  0.720  1.0
  Se  Se31  1  0.912  0.413  0.780  1.0
  Se  Se32  1  0.967  0.209  0.244  1.0
  Se  Se33  1  0.467  0.791  0.256  1.0
  Se  Se34  1  0.033  0.791  0.756  1.0
  Se  Se35  1  0.533  0.209  0.744  1.0
  Se  Se36  1  0.764  0.043  0.400  1.0
  Se  Se37  1  0.264  0.957  0.100  1.0
  Se  Se38  1  0.236  0.957  0.600  1.0
  Se  Se39  1  0.736  0.043  0.900  1.0
  Se  Se40  1  0.249  0.077  0.403  1.0
  Se  Se41  1  0.749  0.923  0.097  1.0
  Se  Se42  1  0.751  0.923  0.597  1.0
  Se  Se43  1  0.251  0.077  0.903  1.0
  Se  Se44  1  0.753  0.579  0.392  1.0
  Se  Se45  1  0.253  0.421  0.108  1.0
  Se  Se46  1  0.247  0.421  0.608  1.0
  Se  Se47  1  0.747  0.579  0.892  1.0
[/CIF]
.