The material structure described by Sr4PrCeO8 crystallizes in the monoclinic P2/m space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to one O(3), two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms. In the second Sr site, Sr(2) is bonded in a 7-coordinate geometry to one O(4), two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Pr(1) is bonded to two equivalent O(2) and four equivalent O(4) atoms to form edge-sharing PrO6 octahedra. Ce(1) is bonded to two equivalent O(1) and four equivalent O(3) atoms to form edge-sharing CeO6 octahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(1), two equivalent Sr(2), and one Ce(1) atom to form distorted OSr4Ce trigonal bipyramids that share corners with four equivalent O(2)Sr4Pr square pyramids,  a cornercorner with one O(1)Sr4Ce trigonal bipyramid, corners with two equivalent O(4)Sr3Pr2 trigonal bipyramids, edges with two equivalent O(2)Sr4Pr square pyramids, edges with two equivalent O(4)Sr3Pr2 trigonal bipyramids, and edges with two equivalent O(1)Sr4Ce trigonal bipyramids. In the second O site, O(2) is bonded to two equivalent Sr(1), two equivalent Sr(2), and one Pr(1) atom to form distorted OSr4Pr square pyramids that share  a cornercorner with one O(2)Sr4Pr square pyramid, corners with two equivalent O(4)Sr3Pr2 trigonal bipyramids, corners with four equivalent O(1)Sr4Ce trigonal bipyramids, edges with two equivalent O(2)Sr4Pr square pyramids, edges with two equivalent O(1)Sr4Ce trigonal bipyramids, and edges with four equivalent O(4)Sr3Pr2 trigonal bipyramids. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Sr(1), two equivalent Sr(2), and two equivalent Ce(1) atoms. In the fourth O site, O(4) is bonded to one Sr(2), two equivalent Sr(1), and two equivalent Pr(1) atoms to form distorted OSr3Pr2 trigonal bipyramids that share corners with two equivalent O(2)Sr4Pr square pyramids, corners with two equivalent O(1)Sr4Ce trigonal bipyramids, corners with four equivalent O(4)Sr3Pr2 trigonal bipyramids, edges with four equivalent O(2)Sr4Pr square pyramids, edges with two equivalent O(4)Sr3Pr2 trigonal bipyramids, and edges with two equivalent O(1)Sr4Ce trigonal bipyramids. is represented by the CIF file [CIF]
data_Sr4CePrO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.670
_cell_length_b   6.205
_cell_length_c   10.439
_cell_angle_alpha   90.317
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   237.696
_cell_formula_units_Z   1
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
  Sr  Sr0  1  0.500  0.565  0.822  1.0
  Sr  Sr1  1  0.500  0.435  0.178  1.0
  Sr  Sr2  1  0.500  0.066  0.677  1.0
  Sr  Sr3  1  0.500  0.934  0.323  1.0
  Ce  Ce4  1  0.000  0.500  0.500  1.0
  Pr  Pr5  1  0.000  0.000  0.000  1.0
  O  O6  1  0.000  0.359  0.691  1.0
  O  O7  1  0.000  0.641  0.309  1.0
  O  O8  1  0.000  0.852  0.794  1.0
  O  O9  1  0.000  0.148  0.206  1.0
  O  O10  1  0.500  0.726  0.540  1.0
  O  O11  1  0.500  0.274  0.460  1.0
  O  O12  1  0.500  0.241  0.956  1.0
  O  O13  1  0.500  0.759  0.044  1.0
[/CIF]
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The material structure described by Sr4PrCeO8 crystallizes in the monoclinic P2/m space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to one O(3), two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms. In the second Sr site, Sr(2) is bonded in a 7-coordinate geometry to one O(4), two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Pr(1) is bonded to two equivalent O(2) and four equivalent O(4) atoms to form edge-sharing PrO6 octahedra. Ce(1) is bonded to two equivalent O(1) and four equivalent O(3) atoms to form edge-sharing CeO6 octahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(1), two equivalent Sr(2), and one Ce(1) atom to form distorted OSr4Ce trigonal bipyramids that share corners with four equivalent O(2)Sr4Pr square pyramids,  a cornercorner with one O(1)Sr4Ce trigonal bipyramid, corners with two equivalent O(4)Sr3Pr2 trigonal bipyramids, edges with two equivalent O(2)Sr4Pr square pyramids, edges with two equivalent O(4)Sr3Pr2 trigonal bipyramids, and edges with two equivalent O(1)Sr4Ce trigonal bipyramids. In the second O site, O(2) is bonded to two equivalent Sr(1), two equivalent Sr(2), and one Pr(1) atom to form distorted OSr4Pr square pyramids that share  a cornercorner with one O(2)Sr4Pr square pyramid, corners with two equivalent O(4)Sr3Pr2 trigonal bipyramids, corners with four equivalent O(1)Sr4Ce trigonal bipyramids, edges with two equivalent O(2)Sr4Pr square pyramids, edges with two equivalent O(1)Sr4Ce trigonal bipyramids, and edges with four equivalent O(4)Sr3Pr2 trigonal bipyramids. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Sr(1), two equivalent Sr(2), and two equivalent Ce(1) atoms. In the fourth O site, O(4) is bonded to one Sr(2), two equivalent Sr(1), and two equivalent Pr(1) atoms to form distorted OSr3Pr2 trigonal bipyramids that share corners with two equivalent O(2)Sr4Pr square pyramids, corners with two equivalent O(1)Sr4Ce trigonal bipyramids, corners with four equivalent O(4)Sr3Pr2 trigonal bipyramids, edges with four equivalent O(2)Sr4Pr square pyramids, edges with two equivalent O(4)Sr3Pr2 trigonal bipyramids, and edges with two equivalent O(1)Sr4Ce trigonal bipyramids. is represented by the CIF file [CIF]
data_Sr4CePrO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.670
_cell_length_b   6.205
_cell_length_c   10.439
_cell_angle_alpha   90.317
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   237.696
_cell_formula_units_Z   1
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
  Sr  Sr0  1  0.500  0.565  0.822  1.0
  Sr  Sr1  1  0.500  0.435  0.178  1.0
  Sr  Sr2  1  0.500  0.066  0.677  1.0
  Sr  Sr3  1  0.500  0.934  0.323  1.0
  Ce  Ce4  1  0.000  0.500  0.500  1.0
  Pr  Pr5  1  0.000  0.000  0.000  1.0
  O  O6  1  0.000  0.359  0.691  1.0
  O  O7  1  0.000  0.641  0.309  1.0
  O  O8  1  0.000  0.852  0.794  1.0
  O  O9  1  0.000  0.148  0.206  1.0
  O  O10  1  0.500  0.726  0.540  1.0
  O  O11  1  0.500  0.274  0.460  1.0
  O  O12  1  0.500  0.241  0.956  1.0
  O  O13  1  0.500  0.759  0.044  1.0
[/CIF]
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