The material structure described by Pr2Br5 crystallizes in the monoclinic P2_1/m space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 8-coordinate geometry to one Br(1), two equivalent Br(4), two equivalent Br(5), and three equivalent Br(2) atoms. In the second Pr site, Pr(2) is bonded to one Br(4), one Br(5), two equivalent Br(1), and three equivalent Br(3) atoms to form distorted edge-sharing PrBr7 pentagonal bipyramids. There are five inequivalent Br sites. In the first Br site, Br(1) is bonded in a distorted L-shaped geometry to one Pr(1) and two equivalent Pr(2) atoms. In the second Br site, Br(2) is bonded in a trigonal non-coplanar geometry to three equivalent Pr(1) atoms. In the third Br site, Br(3) is bonded in a trigonal non-coplanar geometry to three equivalent Pr(2) atoms. In the fourth Br site, Br(4) is bonded in a distorted T-shaped geometry to one Pr(2) and two equivalent Pr(1) atoms. In the fifth Br site, Br(5) is bonded in a distorted T-shaped geometry to one Pr(2) and two equivalent Pr(1) atoms. is represented by the CIF file [CIF]
data_Pr2Br5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.205
_cell_length_b   7.937
_cell_length_c   13.497
_cell_angle_alpha   90.312
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   450.450
_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
  Pr  Pr0  1  0.250  0.921  0.160  1.0
  Pr  Pr1  1  0.750  0.079  0.840  1.0
  Pr  Pr2  1  0.250  0.424  0.659  1.0
  Pr  Pr3  1  0.750  0.576  0.341  1.0
  Br  Br4  1  0.250  0.335  0.273  1.0
  Br  Br5  1  0.750  0.665  0.727  1.0
  Br  Br6  1  0.250  0.853  0.930  1.0
  Br  Br7  1  0.750  0.147  0.070  1.0
  Br  Br8  1  0.750  0.310  0.511  1.0
  Br  Br9  1  0.250  0.690  0.489  1.0
  Br  Br10  1  0.750  0.954  0.320  1.0
  Br  Br11  1  0.250  0.046  0.680  1.0
  Br  Br12  1  0.750  0.651  0.121  1.0
  Br  Br13  1  0.250  0.349  0.879  1.0
[/CIF]
.
The material structure described by Pr2Br5 crystallizes in the monoclinic P2_1/m space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 8-coordinate geometry to one Br(1), two equivalent Br(4), two equivalent Br(5), and three equivalent Br(2) atoms. In the second Pr site, Pr(2) is bonded to one Br(4), one Br(5), two equivalent Br(1), and three equivalent Br(3) atoms to form distorted edge-sharing PrBr7 pentagonal bipyramids. There are five inequivalent Br sites. In the first Br site, Br(1) is bonded in a distorted L-shaped geometry to one Pr(1) and two equivalent Pr(2) atoms. In the second Br site, Br(2) is bonded in a trigonal non-coplanar geometry to three equivalent Pr(1) atoms. In the third Br site, Br(3) is bonded in a trigonal non-coplanar geometry to three equivalent Pr(2) atoms. In the fourth Br site, Br(4) is bonded in a distorted T-shaped geometry to one Pr(2) and two equivalent Pr(1) atoms. In the fifth Br site, Br(5) is bonded in a distorted T-shaped geometry to one Pr(2) and two equivalent Pr(1) atoms. is represented by the CIF file [CIF]
data_Pr2Br5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.205
_cell_length_b   7.937
_cell_length_c   13.497
_cell_angle_alpha   90.312
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   450.450
_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
  Pr  Pr0  1  0.250  0.921  0.160  1.0
  Pr  Pr1  1  0.750  0.079  0.840  1.0
  Pr  Pr2  1  0.250  0.424  0.659  1.0
  Pr  Pr3  1  0.750  0.576  0.341  1.0
  Br  Br4  1  0.250  0.335  0.273  1.0
  Br  Br5  1  0.750  0.665  0.727  1.0
  Br  Br6  1  0.250  0.853  0.930  1.0
  Br  Br7  1  0.750  0.147  0.070  1.0
  Br  Br8  1  0.750  0.310  0.511  1.0
  Br  Br9  1  0.250  0.690  0.489  1.0
  Br  Br10  1  0.750  0.954  0.320  1.0
  Br  Br11  1  0.250  0.046  0.680  1.0
  Br  Br12  1  0.750  0.651  0.121  1.0
  Br  Br13  1  0.250  0.349  0.879  1.0
[/CIF]
.