The compound described by K3Ce(PO4)2 crystallizes in the monoclinic P2_1/m space group. There are three inequivalent K sites. In the first K site, K(1) is bonded in a 10-coordinate geometry to one O(4), two equivalent O(1), three equivalent O(5), and four equivalent O(3) atoms. In the second K site, K(2) is bonded in a 9-coordinate geometry to one O(2), one O(5), two equivalent O(1), two equivalent O(3), and three equivalent O(4) atoms. In the third K site, K(3) is bonded in a 11-coordinate geometry to one O(4), one O(6), two equivalent O(3), three equivalent O(2), and four equivalent O(1) atoms. Ce(1) is bonded in a 7-coordinate geometry to one O(2), one O(5), one O(6), two equivalent O(1), and two equivalent O(3) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded in a tetrahedral geometry to one O(2), one O(6), and two equivalent O(1) atoms. In the second P site, P(2) is bonded in a tetrahedral geometry to one O(4), one O(5), and two equivalent O(3) atoms. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one K(1), one K(2), two equivalent K(3), one Ce(1), and one P(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one K(2), three equivalent K(3), one Ce(1), and one P(1) atom. In the third O site, O(3) is bonded in a 1-coordinate geometry to one K(2), one K(3), two equivalent K(1), one Ce(1), and one P(2) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one K(1), one K(3), three equivalent K(2), and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one K(2), three equivalent K(1), one Ce(1), and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one K(3), one Ce(1), and one P(1) atom. is represented by the CIF file [CIF]
data_K3Ce(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.707
_cell_length_b   7.558
_cell_length_c   9.686
_cell_angle_alpha   89.141
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   417.718
_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  0.250  0.796  0.583  1.0
  K  K1  1  0.250  0.508  0.309  1.0
  K  K2  1  0.750  0.204  0.417  1.0
  K  K3  1  0.750  0.639  0.094  1.0
  K  K4  1  0.750  0.492  0.691  1.0
  K  K5  1  0.250  0.361  0.906  1.0
  Ce  Ce6  1  0.750  0.991  0.791  1.0
  Ce  Ce7  1  0.250  0.009  0.209  1.0
  P  P8  1  0.250  0.800  0.926  1.0
  P  P9  1  0.750  0.764  0.414  1.0
  P  P10  1  0.250  0.236  0.586  1.0
  P  P11  1  0.750  0.200  0.074  1.0
  O  O12  1  0.973  0.258  0.154  1.0
  O  O13  1  0.750  0.285  0.926  1.0
  O  O14  1  0.973  0.843  0.342  1.0
  O  O15  1  0.527  0.258  0.154  1.0
  O  O16  1  0.750  0.562  0.400  1.0
  O  O17  1  0.250  0.715  0.074  1.0
  O  O18  1  0.027  0.742  0.846  1.0
  O  O19  1  0.750  0.819  0.569  1.0
  O  O20  1  0.527  0.843  0.342  1.0
  O  O21  1  0.473  0.157  0.658  1.0
  O  O22  1  0.473  0.742  0.846  1.0
  O  O23  1  0.027  0.157  0.658  1.0
  O  O24  1  0.250  0.181  0.431  1.0
  O  O25  1  0.750  0.996  0.057  1.0
  O  O26  1  0.250  0.438  0.600  1.0
  O  O27  1  0.250  0.004  0.943  1.0
[/CIF]
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The compound described by K3Ce(PO4)2 crystallizes in the monoclinic P2_1/m space group. There are three inequivalent K sites. In the first K site, K(1) is bonded in a 10-coordinate geometry to one O(4), two equivalent O(1), three equivalent O(5), and four equivalent O(3) atoms. In the second K site, K(2) is bonded in a 9-coordinate geometry to one O(2), one O(5), two equivalent O(1), two equivalent O(3), and three equivalent O(4) atoms. In the third K site, K(3) is bonded in a 11-coordinate geometry to one O(4), one O(6), two equivalent O(3), three equivalent O(2), and four equivalent O(1) atoms. Ce(1) is bonded in a 7-coordinate geometry to one O(2), one O(5), one O(6), two equivalent O(1), and two equivalent O(3) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded in a tetrahedral geometry to one O(2), one O(6), and two equivalent O(1) atoms. In the second P site, P(2) is bonded in a tetrahedral geometry to one O(4), one O(5), and two equivalent O(3) atoms. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one K(1), one K(2), two equivalent K(3), one Ce(1), and one P(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one K(2), three equivalent K(3), one Ce(1), and one P(1) atom. In the third O site, O(3) is bonded in a 1-coordinate geometry to one K(2), one K(3), two equivalent K(1), one Ce(1), and one P(2) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one K(1), one K(3), three equivalent K(2), and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one K(2), three equivalent K(1), one Ce(1), and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one K(3), one Ce(1), and one P(1) atom. is represented by the CIF file [CIF]
data_K3Ce(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.707
_cell_length_b   7.558
_cell_length_c   9.686
_cell_angle_alpha   89.141
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   417.718
_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  0.250  0.796  0.583  1.0
  K  K1  1  0.250  0.508  0.309  1.0
  K  K2  1  0.750  0.204  0.417  1.0
  K  K3  1  0.750  0.639  0.094  1.0
  K  K4  1  0.750  0.492  0.691  1.0
  K  K5  1  0.250  0.361  0.906  1.0
  Ce  Ce6  1  0.750  0.991  0.791  1.0
  Ce  Ce7  1  0.250  0.009  0.209  1.0
  P  P8  1  0.250  0.800  0.926  1.0
  P  P9  1  0.750  0.764  0.414  1.0
  P  P10  1  0.250  0.236  0.586  1.0
  P  P11  1  0.750  0.200  0.074  1.0
  O  O12  1  0.973  0.258  0.154  1.0
  O  O13  1  0.750  0.285  0.926  1.0
  O  O14  1  0.973  0.843  0.342  1.0
  O  O15  1  0.527  0.258  0.154  1.0
  O  O16  1  0.750  0.562  0.400  1.0
  O  O17  1  0.250  0.715  0.074  1.0
  O  O18  1  0.027  0.742  0.846  1.0
  O  O19  1  0.750  0.819  0.569  1.0
  O  O20  1  0.527  0.843  0.342  1.0
  O  O21  1  0.473  0.157  0.658  1.0
  O  O22  1  0.473  0.742  0.846  1.0
  O  O23  1  0.027  0.157  0.658  1.0
  O  O24  1  0.250  0.181  0.431  1.0
  O  O25  1  0.750  0.996  0.057  1.0
  O  O26  1  0.250  0.438  0.600  1.0
  O  O27  1  0.250  0.004  0.943  1.0
[/CIF]
.