The compound described by CsCe(PO3)4 crystallizes in the monoclinic P2_1 space group. Cs(1) is bonded in a 10-coordinate geometry to one O(1), one O(10), one O(12), one O(4), one O(6), one O(7), one O(8), one O(9), and two equivalent O(5) atoms. Ce(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(11), one O(12), one O(4), one O(5), one O(6), and one O(7) atom. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(10), one O(3), one O(5), and one O(9) atom to form corner-sharing PO4 tetrahedra. In the second P site, P(2) is bonded to one O(1), one O(2), one O(6), and one O(8) atom to form corner-sharing PO4 tetrahedra. In the third P site, P(3) is bonded to one O(11), one O(7), one O(8), and one O(9) atom to form corner-sharing PO4 tetrahedra. In the fourth P site, P(4) is bonded to one O(12), one O(2), one O(3), and one O(4) atom to form corner-sharing PO4 tetrahedra. There are twelve inequivalent O sites. In the first O site, O(11) is bonded in a distorted linear geometry to one Ce(1) and one P(3) atom. In the second O site, O(12) is bonded in a 1-coordinate geometry to one Cs(1), one Ce(1), and one P(4) atom. In the third O site, O(1) is bonded in a 2-coordinate geometry to one Cs(1), one Ce(1), and one P(2) atom. In the fourth O site, O(2) is bonded in a bent 150 degrees geometry to one P(2) and one P(4) atom. In the fifth O site, O(3) is bonded in a bent 120 degrees geometry to one P(1) and one P(4) atom. In the sixth O site, O(4) is bonded in a distorted single-bond geometry to one Cs(1), one Ce(1), and one P(4) atom. In the seventh O site, O(5) is bonded in a distorted single-bond geometry to two equivalent Cs(1), one Ce(1), and one P(1) atom. In the eighth O site, O(6) is bonded in a distorted single-bond geometry to one Cs(1), one Ce(1), and one P(2) atom. In the ninth O site, O(7) is bonded in a distorted single-bond geometry to one Cs(1), one Ce(1), and one P(3) atom. In the tenth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Cs(1), one P(2), and one P(3) atom. In the eleventh O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Cs(1), one P(1), and one P(3) atom. In the twelfth O site, O(10) is bonded in a distorted single-bond geometry to one Cs(1), one Ce(1), and one P(1) atom. is represented by the CIF file [CIF]
data_CsCe(PO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.360
_cell_length_b   7.297
_cell_length_c   8.955
_cell_angle_alpha   80.410
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   603.078
_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
  Cs  Cs0  1  0.800  0.827  0.175  1.0
  Cs  Cs1  1  0.300  0.173  0.825  1.0
  Ce  Ce2  1  0.466  0.297  0.303  1.0
  Ce  Ce3  1  0.966  0.703  0.697  1.0
  P  P4  1  0.390  0.806  0.227  1.0
  P  P5  1  0.890  0.194  0.773  1.0
  P  P6  1  0.074  0.440  0.376  1.0
  P  P7  1  0.574  0.560  0.624  1.0
  P  P8  1  0.189  0.582  0.073  1.0
  P  P9  1  0.689  0.418  0.927  1.0
  P  P10  1  0.340  0.855  0.542  1.0
  P  P11  1  0.840  0.145  0.458  1.0
  O  O12  1  0.020  0.577  0.470  1.0
  O  O13  1  0.520  0.423  0.530  1.0
  O  O14  1  0.452  0.712  0.634  1.0
  O  O15  1  0.952  0.288  0.366  1.0
  O  O16  1  0.306  0.778  0.388  1.0
  O  O17  1  0.806  0.222  0.612  1.0
  O  O18  1  0.205  0.837  0.634  1.0
  O  O19  1  0.705  0.163  0.366  1.0
  O  O20  1  0.933  0.993  0.818  1.0
  O  O21  1  0.433  0.007  0.182  1.0
  O  O22  1  0.218  0.351  0.407  1.0
  O  O23  1  0.718  0.649  0.593  1.0
  O  O24  1  0.296  0.426  0.092  1.0
  O  O25  1  0.796  0.574  0.908  1.0
  O  O26  1  0.065  0.542  0.200  1.0
  O  O27  1  0.565  0.458  0.800  1.0
  O  O28  1  0.261  0.772  0.115  1.0
  O  O29  1  0.761  0.228  0.885  1.0
  O  O30  1  0.500  0.656  0.233  1.0
  O  O31  1  0.000  0.344  0.767  1.0
  O  O32  1  0.116  0.641  0.925  1.0
  O  O33  1  0.616  0.359  0.075  1.0
  O  O34  1  0.911  0.959  0.492  1.0
  O  O35  1  0.411  0.041  0.508  1.0
[/CIF]
.
The compound described by CsCe(PO3)4 crystallizes in the monoclinic P2_1 space group. Cs(1) is bonded in a 10-coordinate geometry to one O(1), one O(10), one O(12), one O(4), one O(6), one O(7), one O(8), one O(9), and two equivalent O(5) atoms. Ce(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(11), one O(12), one O(4), one O(5), one O(6), and one O(7) atom. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(10), one O(3), one O(5), and one O(9) atom to form corner-sharing PO4 tetrahedra. In the second P site, P(2) is bonded to one O(1), one O(2), one O(6), and one O(8) atom to form corner-sharing PO4 tetrahedra. In the third P site, P(3) is bonded to one O(11), one O(7), one O(8), and one O(9) atom to form corner-sharing PO4 tetrahedra. In the fourth P site, P(4) is bonded to one O(12), one O(2), one O(3), and one O(4) atom to form corner-sharing PO4 tetrahedra. There are twelve inequivalent O sites. In the first O site, O(11) is bonded in a distorted linear geometry to one Ce(1) and one P(3) atom. In the second O site, O(12) is bonded in a 1-coordinate geometry to one Cs(1), one Ce(1), and one P(4) atom. In the third O site, O(1) is bonded in a 2-coordinate geometry to one Cs(1), one Ce(1), and one P(2) atom. In the fourth O site, O(2) is bonded in a bent 150 degrees geometry to one P(2) and one P(4) atom. In the fifth O site, O(3) is bonded in a bent 120 degrees geometry to one P(1) and one P(4) atom. In the sixth O site, O(4) is bonded in a distorted single-bond geometry to one Cs(1), one Ce(1), and one P(4) atom. In the seventh O site, O(5) is bonded in a distorted single-bond geometry to two equivalent Cs(1), one Ce(1), and one P(1) atom. In the eighth O site, O(6) is bonded in a distorted single-bond geometry to one Cs(1), one Ce(1), and one P(2) atom. In the ninth O site, O(7) is bonded in a distorted single-bond geometry to one Cs(1), one Ce(1), and one P(3) atom. In the tenth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Cs(1), one P(2), and one P(3) atom. In the eleventh O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Cs(1), one P(1), and one P(3) atom. In the twelfth O site, O(10) is bonded in a distorted single-bond geometry to one Cs(1), one Ce(1), and one P(1) atom. is represented by the CIF file [CIF]
data_CsCe(PO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.360
_cell_length_b   7.297
_cell_length_c   8.955
_cell_angle_alpha   80.410
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   603.078
_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
  Cs  Cs0  1  0.800  0.827  0.175  1.0
  Cs  Cs1  1  0.300  0.173  0.825  1.0
  Ce  Ce2  1  0.466  0.297  0.303  1.0
  Ce  Ce3  1  0.966  0.703  0.697  1.0
  P  P4  1  0.390  0.806  0.227  1.0
  P  P5  1  0.890  0.194  0.773  1.0
  P  P6  1  0.074  0.440  0.376  1.0
  P  P7  1  0.574  0.560  0.624  1.0
  P  P8  1  0.189  0.582  0.073  1.0
  P  P9  1  0.689  0.418  0.927  1.0
  P  P10  1  0.340  0.855  0.542  1.0
  P  P11  1  0.840  0.145  0.458  1.0
  O  O12  1  0.020  0.577  0.470  1.0
  O  O13  1  0.520  0.423  0.530  1.0
  O  O14  1  0.452  0.712  0.634  1.0
  O  O15  1  0.952  0.288  0.366  1.0
  O  O16  1  0.306  0.778  0.388  1.0
  O  O17  1  0.806  0.222  0.612  1.0
  O  O18  1  0.205  0.837  0.634  1.0
  O  O19  1  0.705  0.163  0.366  1.0
  O  O20  1  0.933  0.993  0.818  1.0
  O  O21  1  0.433  0.007  0.182  1.0
  O  O22  1  0.218  0.351  0.407  1.0
  O  O23  1  0.718  0.649  0.593  1.0
  O  O24  1  0.296  0.426  0.092  1.0
  O  O25  1  0.796  0.574  0.908  1.0
  O  O26  1  0.065  0.542  0.200  1.0
  O  O27  1  0.565  0.458  0.800  1.0
  O  O28  1  0.261  0.772  0.115  1.0
  O  O29  1  0.761  0.228  0.885  1.0
  O  O30  1  0.500  0.656  0.233  1.0
  O  O31  1  0.000  0.344  0.767  1.0
  O  O32  1  0.116  0.641  0.925  1.0
  O  O33  1  0.616  0.359  0.075  1.0
  O  O34  1  0.911  0.959  0.492  1.0
  O  O35  1  0.411  0.041  0.508  1.0
[/CIF]
.