The crystal structure described by K2Ce(PO4)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 8-coordinate geometry to one O(2), one O(3), one O(5), one O(6), two equivalent O(1), and two equivalent O(8) atoms. In the second K site, K(2) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(3), one O(5), one O(7), two equivalent O(4), and two equivalent O(6) atoms. Ce(1) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. There are two inequivalent P sites. In the first P site, P(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. In the second P site, P(2) is bonded in a tetrahedral geometry to one O(5), one O(6), one O(7), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a distorted single-bond geometry to two equivalent K(2), one Ce(1), and one P(1) atom. In the second O site, O(5) is bonded in a distorted single-bond geometry to one K(1), one K(2), one Ce(1), and one P(2) atom. In the third O site, O(6) is bonded in a 1-coordinate geometry to one K(1), two equivalent K(2), one Ce(1), and one P(2) atom. In the fourth O site, O(7) is bonded in a 3-coordinate geometry to one K(2), one Ce(1), and one P(2) atom. In the fifth O site, O(8) is bonded in a distorted single-bond geometry to two equivalent K(1), one Ce(1), and one P(2) atom. In the sixth O site, O(1) is bonded in a distorted single-bond geometry to one K(2), two equivalent K(1), one Ce(1), and one P(1) atom. In the seventh O site, O(2) is bonded in a 1-coordinate geometry to one K(1), one K(2), one Ce(1), and one P(1) atom. In the eighth O site, O(3) is bonded in a 1-coordinate geometry to one K(1), one K(2), one Ce(1), and one P(1) atom. is represented by the CIF file [CIF]
data_K2Ce(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.583
_cell_length_b   9.103
_cell_length_c   10.859
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   110.917
_symmetry_Int_Tables_number   1
_cell_volume   700.136
_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  0.898  0.046  0.627  1.0
  K  K1  1  0.398  0.546  0.873  1.0
  K  K2  1  0.102  0.954  0.373  1.0
  K  K3  1  0.602  0.454  0.127  1.0
  K  K4  1  0.122  0.456  0.615  1.0
  K  K5  1  0.622  0.956  0.885  1.0
  K  K6  1  0.878  0.544  0.385  1.0
  K  K7  1  0.378  0.044  0.115  1.0
  Ce  Ce8  1  0.476  0.220  0.639  1.0
  Ce  Ce9  1  0.976  0.720  0.861  1.0
  Ce  Ce10  1  0.524  0.780  0.361  1.0
  Ce  Ce11  1  0.024  0.280  0.139  1.0
  P  P12  1  0.711  0.646  0.638  1.0
  P  P13  1  0.211  0.146  0.862  1.0
  P  P14  1  0.289  0.354  0.362  1.0
  P  P15  1  0.789  0.854  0.138  1.0
  P  P16  1  0.674  0.137  0.369  1.0
  P  P17  1  0.174  0.637  0.131  1.0
  P  P18  1  0.326  0.863  0.631  1.0
  P  P19  1  0.826  0.363  0.869  1.0
  O  O20  1  0.711  0.746  0.753  1.0
  O  O21  1  0.211  0.246  0.747  1.0
  O  O22  1  0.289  0.254  0.247  1.0
  O  O23  1  0.789  0.754  0.253  1.0
  O  O24  1  0.543  0.490  0.643  1.0
  O  O25  1  0.043  0.990  0.857  1.0
  O  O26  1  0.457  0.510  0.357  1.0
  O  O27  1  0.957  0.010  0.143  1.0
  O  O28  1  0.708  0.737  0.520  1.0
  O  O29  1  0.208  0.237  0.980  1.0
  O  O30  1  0.292  0.263  0.480  1.0
  O  O31  1  0.792  0.763  0.020  1.0
  O  O32  1  0.899  0.619  0.648  1.0
  O  O33  1  0.399  0.119  0.852  1.0
  O  O34  1  0.101  0.381  0.352  1.0
  O  O35  1  0.601  0.881  0.148  1.0
  O  O36  1  0.469  0.021  0.357  1.0
  O  O37  1  0.969  0.521  0.143  1.0
  O  O38  1  0.531  0.979  0.643  1.0
  O  O39  1  0.031  0.479  0.857  1.0
  O  O40  1  0.738  0.232  0.250  1.0
  O  O41  1  0.238  0.732  0.250  1.0
  O  O42  1  0.262  0.768  0.750  1.0
  O  O43  1  0.762  0.268  0.750  1.0
  O  O44  1  0.689  0.250  0.478  1.0
  O  O45  1  0.189  0.750  0.022  1.0
  O  O46  1  0.311  0.750  0.522  1.0
  O  O47  1  0.811  0.250  0.978  1.0
  O  O48  1  0.785  0.028  0.394  1.0
  O  O49  1  0.285  0.528  0.106  1.0
  O  O50  1  0.215  0.972  0.606  1.0
  O  O51  1  0.715  0.472  0.894  1.0
[/CIF]
.
The crystal structure described by K2Ce(PO4)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 8-coordinate geometry to one O(2), one O(3), one O(5), one O(6), two equivalent O(1), and two equivalent O(8) atoms. In the second K site, K(2) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(3), one O(5), one O(7), two equivalent O(4), and two equivalent O(6) atoms. Ce(1) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. There are two inequivalent P sites. In the first P site, P(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. In the second P site, P(2) is bonded in a tetrahedral geometry to one O(5), one O(6), one O(7), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a distorted single-bond geometry to two equivalent K(2), one Ce(1), and one P(1) atom. In the second O site, O(5) is bonded in a distorted single-bond geometry to one K(1), one K(2), one Ce(1), and one P(2) atom. In the third O site, O(6) is bonded in a 1-coordinate geometry to one K(1), two equivalent K(2), one Ce(1), and one P(2) atom. In the fourth O site, O(7) is bonded in a 3-coordinate geometry to one K(2), one Ce(1), and one P(2) atom. In the fifth O site, O(8) is bonded in a distorted single-bond geometry to two equivalent K(1), one Ce(1), and one P(2) atom. In the sixth O site, O(1) is bonded in a distorted single-bond geometry to one K(2), two equivalent K(1), one Ce(1), and one P(1) atom. In the seventh O site, O(2) is bonded in a 1-coordinate geometry to one K(1), one K(2), one Ce(1), and one P(1) atom. In the eighth O site, O(3) is bonded in a 1-coordinate geometry to one K(1), one K(2), one Ce(1), and one P(1) atom. is represented by the CIF file [CIF]
data_K2Ce(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.583
_cell_length_b   9.103
_cell_length_c   10.859
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   110.917
_symmetry_Int_Tables_number   1
_cell_volume   700.136
_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  0.898  0.046  0.627  1.0
  K  K1  1  0.398  0.546  0.873  1.0
  K  K2  1  0.102  0.954  0.373  1.0
  K  K3  1  0.602  0.454  0.127  1.0
  K  K4  1  0.122  0.456  0.615  1.0
  K  K5  1  0.622  0.956  0.885  1.0
  K  K6  1  0.878  0.544  0.385  1.0
  K  K7  1  0.378  0.044  0.115  1.0
  Ce  Ce8  1  0.476  0.220  0.639  1.0
  Ce  Ce9  1  0.976  0.720  0.861  1.0
  Ce  Ce10  1  0.524  0.780  0.361  1.0
  Ce  Ce11  1  0.024  0.280  0.139  1.0
  P  P12  1  0.711  0.646  0.638  1.0
  P  P13  1  0.211  0.146  0.862  1.0
  P  P14  1  0.289  0.354  0.362  1.0
  P  P15  1  0.789  0.854  0.138  1.0
  P  P16  1  0.674  0.137  0.369  1.0
  P  P17  1  0.174  0.637  0.131  1.0
  P  P18  1  0.326  0.863  0.631  1.0
  P  P19  1  0.826  0.363  0.869  1.0
  O  O20  1  0.711  0.746  0.753  1.0
  O  O21  1  0.211  0.246  0.747  1.0
  O  O22  1  0.289  0.254  0.247  1.0
  O  O23  1  0.789  0.754  0.253  1.0
  O  O24  1  0.543  0.490  0.643  1.0
  O  O25  1  0.043  0.990  0.857  1.0
  O  O26  1  0.457  0.510  0.357  1.0
  O  O27  1  0.957  0.010  0.143  1.0
  O  O28  1  0.708  0.737  0.520  1.0
  O  O29  1  0.208  0.237  0.980  1.0
  O  O30  1  0.292  0.263  0.480  1.0
  O  O31  1  0.792  0.763  0.020  1.0
  O  O32  1  0.899  0.619  0.648  1.0
  O  O33  1  0.399  0.119  0.852  1.0
  O  O34  1  0.101  0.381  0.352  1.0
  O  O35  1  0.601  0.881  0.148  1.0
  O  O36  1  0.469  0.021  0.357  1.0
  O  O37  1  0.969  0.521  0.143  1.0
  O  O38  1  0.531  0.979  0.643  1.0
  O  O39  1  0.031  0.479  0.857  1.0
  O  O40  1  0.738  0.232  0.250  1.0
  O  O41  1  0.238  0.732  0.250  1.0
  O  O42  1  0.262  0.768  0.750  1.0
  O  O43  1  0.762  0.268  0.750  1.0
  O  O44  1  0.689  0.250  0.478  1.0
  O  O45  1  0.189  0.750  0.022  1.0
  O  O46  1  0.311  0.750  0.522  1.0
  O  O47  1  0.811  0.250  0.978  1.0
  O  O48  1  0.785  0.028  0.394  1.0
  O  O49  1  0.285  0.528  0.106  1.0
  O  O50  1  0.215  0.972  0.606  1.0
  O  O51  1  0.715  0.472  0.894  1.0
[/CIF]
.