The structure described by K2Ce(PO4)2 crystallizes in the tetragonal I4_1/amd space group. K(1) is bonded in a 4-coordinate geometry to four equivalent O(2) atoms. Ce(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(2) atoms. P(1) is bonded in a tetrahedral geometry to two equivalent O(1) and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Ce(1) and one P(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent K(1), one Ce(1), and one P(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2Ce(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.838
_cell_length_b   6.838
_cell_length_c   10.057
_cell_angle_alpha   109.873
_cell_angle_beta   109.873
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   412.288
_cell_formula_units_Z   2
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  0.000  0.500  0.000  1.0
  K  K1  1  0.500  0.000  0.500  1.0
  K  K2  1  0.000  0.000  0.000  1.0
  K  K3  1  0.000  0.000  0.500  1.0
  Ce  Ce4  1  0.625  0.375  0.250  1.0
  Ce  Ce5  1  0.375  0.625  0.750  1.0
  P  P6  1  0.551  0.801  0.102  1.0
  P  P7  1  0.449  0.199  0.898  1.0
  P  P8  1  0.199  0.449  0.398  1.0
  P  P9  1  0.801  0.551  0.602  1.0
  O  O10  1  0.032  0.604  0.708  1.0
  O  O11  1  0.251  0.681  0.502  1.0
  O  O12  1  0.676  0.604  0.708  1.0
  O  O13  1  0.251  0.321  0.502  1.0
  O  O14  1  0.968  0.396  0.292  1.0
  O  O15  1  0.396  0.968  0.792  1.0
  O  O16  1  0.749  0.319  0.498  1.0
  O  O17  1  0.324  0.396  0.292  1.0
  O  O18  1  0.321  0.251  0.002  1.0
  O  O19  1  0.604  0.032  0.208  1.0
  O  O20  1  0.396  0.324  0.792  1.0
  O  O21  1  0.604  0.676  0.208  1.0
  O  O22  1  0.749  0.679  0.498  1.0
  O  O23  1  0.319  0.749  0.998  1.0
  O  O24  1  0.681  0.251  0.002  1.0
  O  O25  1  0.679  0.749  0.998  1.0
[/CIF]
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The structure described by K2Ce(PO4)2 crystallizes in the tetragonal I4_1/amd space group. K(1) is bonded in a 4-coordinate geometry to four equivalent O(2) atoms. Ce(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(2) atoms. P(1) is bonded in a tetrahedral geometry to two equivalent O(1) and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Ce(1) and one P(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent K(1), one Ce(1), and one P(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2Ce(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.838
_cell_length_b   6.838
_cell_length_c   10.057
_cell_angle_alpha   109.873
_cell_angle_beta   109.873
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   412.288
_cell_formula_units_Z   2
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  0.000  0.500  0.000  1.0
  K  K1  1  0.500  0.000  0.500  1.0
  K  K2  1  0.000  0.000  0.000  1.0
  K  K3  1  0.000  0.000  0.500  1.0
  Ce  Ce4  1  0.625  0.375  0.250  1.0
  Ce  Ce5  1  0.375  0.625  0.750  1.0
  P  P6  1  0.551  0.801  0.102  1.0
  P  P7  1  0.449  0.199  0.898  1.0
  P  P8  1  0.199  0.449  0.398  1.0
  P  P9  1  0.801  0.551  0.602  1.0
  O  O10  1  0.032  0.604  0.708  1.0
  O  O11  1  0.251  0.681  0.502  1.0
  O  O12  1  0.676  0.604  0.708  1.0
  O  O13  1  0.251  0.321  0.502  1.0
  O  O14  1  0.968  0.396  0.292  1.0
  O  O15  1  0.396  0.968  0.792  1.0
  O  O16  1  0.749  0.319  0.498  1.0
  O  O17  1  0.324  0.396  0.292  1.0
  O  O18  1  0.321  0.251  0.002  1.0
  O  O19  1  0.604  0.032  0.208  1.0
  O  O20  1  0.396  0.324  0.792  1.0
  O  O21  1  0.604  0.676  0.208  1.0
  O  O22  1  0.749  0.679  0.498  1.0
  O  O23  1  0.319  0.749  0.998  1.0
  O  O24  1  0.681  0.251  0.002  1.0
  O  O25  1  0.679  0.749  0.998  1.0
[/CIF]
.