The compound described by Pr7C3Br10 crystallizes in the triclinic P-1 space group. There are seven inequivalent Pr sites. In the first Pr site, Pr(1) is bonded to one C(1), one C(3), one Br(1), one Br(10), one Br(3), and two equivalent Br(7) atoms to form distorted PrC2Br5 pentagonal bipyramids that share  a cornercorner with one Pr(7)CBr5 octahedra, corners with two equivalent Pr(6)C2Br5 pentagonal bipyramids,  an edgeedge with one Pr(7)CBr5 octahedra, edges with two equivalent Pr(5)CBr5 octahedra,  an edgeedge with one Pr(1)C2Br5 pentagonal bipyramid,  a faceface with one Pr(2)C4Br4 hexagonal bipyramid, and  a faceface with one Pr(6)C2Br5 pentagonal bipyramid. The corner-sharing octahedral tilt angles are 4°. In the second Pr site, Pr(2) is bonded to one C(1), one C(3), two equivalent C(2), one Br(2), one Br(3), one Br(5), and one Br(8) atom to form distorted PrC4Br4 hexagonal bipyramids that share  an edgeedge with one Pr(2)C4Br4 hexagonal bipyramid,  an edgeedge with one Pr(5)CBr5 octahedra,  an edgeedge with one Pr(7)CBr5 octahedra, edges with two equivalent Pr(4)CBr5 octahedra, edges with two equivalent Pr(6)C2Br5 pentagonal bipyramids, and  a faceface with one Pr(1)C2Br5 pentagonal bipyramid. In the third Pr site, Pr(3) is bonded in a 8-coordinate geometry to one C(1), one C(3), two equivalent C(2), one Br(4), one Br(6), and two equivalent Br(5) atoms. In the fourth Pr site, Pr(4) is bonded to one C(2), one Br(2), one Br(4), one Br(6), one Br(8), and one Br(9) atom to form distorted PrCBr5 octahedra that share  a cornercorner with one Pr(6)C2Br5 pentagonal bipyramid, edges with two equivalent Pr(2)C4Br4 hexagonal bipyramids,  an edgeedge with one Pr(5)CBr5 octahedra, and edges with two equivalent Pr(7)CBr5 octahedra. In the fifth Pr site, Pr(5) is bonded to one C(3), one Br(10), one Br(2), one Br(4), and two equivalent Br(1) atoms to form PrCBr5 octahedra that share  an edgeedge with one Pr(2)C4Br4 hexagonal bipyramid,  an edgeedge with one Pr(4)CBr5 octahedra,  an edgeedge with one Pr(5)CBr5 octahedra, edges with two equivalent Pr(1)C2Br5 pentagonal bipyramids, and edges with two equivalent Pr(6)C2Br5 pentagonal bipyramids. In the sixth Pr site, Pr(6) is bonded to one C(1), one C(3), one Br(1), one Br(10), one Br(3), one Br(5), and one Br(9) atom to form distorted PrC2Br5 pentagonal bipyramids that share  a cornercorner with one Pr(4)CBr5 octahedra, corners with two equivalent Pr(1)C2Br5 pentagonal bipyramids, edges with two equivalent Pr(2)C4Br4 hexagonal bipyramids,  an edgeedge with one Pr(7)CBr5 octahedra, edges with two equivalent Pr(5)CBr5 octahedra, and  a faceface with one Pr(1)C2Br5 pentagonal bipyramid. The corner-sharing octahedral tilt angles are 9°. In the seventh Pr site, Pr(7) is bonded to one C(1), one Br(7), one Br(8), one Br(9), and two equivalent Br(6) atoms to form PrCBr5 octahedra that share  a cornercorner with one Pr(1)C2Br5 pentagonal bipyramid,  an edgeedge with one Pr(2)C4Br4 hexagonal bipyramid,  an edgeedge with one Pr(7)CBr5 octahedra, edges with two equivalent Pr(4)CBr5 octahedra,  an edgeedge with one Pr(1)C2Br5 pentagonal bipyramid, and  an edgeedge with one Pr(6)C2Br5 pentagonal bipyramid. There are three inequivalent C sites. In the first C site, C(1) is bonded in a 6-coordinate geometry to one Pr(1), one Pr(2), one Pr(3), one Pr(6), one Pr(7), and one C(3) atom. In the second C site, C(2) is bonded in a 6-coordinate geometry to one Pr(4), two equivalent Pr(2), two equivalent Pr(3), and one C(2) atom. In the third C site, C(3) is bonded in a 6-coordinate geometry to one Pr(1), one Pr(2), one Pr(3), one Pr(5), one Pr(6), and one C(1) atom. There are ten inequivalent Br sites. In the first Br site, Br(1) is bonded in a rectangular see-saw-like geometry to one Pr(1), one Pr(6), and two equivalent Pr(5) atoms. In the second Br site, Br(2) is bonded in a distorted T-shaped geometry to one Pr(2), one Pr(4), and one Pr(5) atom. In the third Br site, Br(3) is bonded in a distorted T-shaped geometry to one Pr(1), one Pr(2), and one Pr(6) atom. In the fourth Br site, Br(4) is bonded in a distorted T-shaped geometry to one Pr(3), one Pr(4), and one Pr(5) atom. In the fifth Br site, Br(5) is bonded in a square co-planar geometry to one Pr(2), one Pr(6), and two equivalent Pr(3) atoms. In the sixth Br site, Br(6) is bonded in a rectangular see-saw-like geometry to one Pr(3), one Pr(4), and two equivalent Pr(7) atoms. In the seventh Br site, Br(7) is bonded in a distorted T-shaped geometry to one Pr(7) and two equivalent Pr(1) atoms. In the eighth Br site, Br(8) is bonded in a distorted T-shaped geometry to one Pr(2), one Pr(4), and one Pr(7) atom. In the ninth Br site, Br(9) is bonded in a T-shaped geometry to one Pr(4), one Pr(6), and one Pr(7) atom. In the tenth Br site, Br(10) is bonded in a distorted T-shaped geometry to one Pr(1), one Pr(5), and one Pr(6) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Pr7C3Br10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.180
_cell_length_b   11.117
_cell_length_c   13.479
_cell_angle_alpha   86.209
_cell_angle_beta   107.731
_cell_angle_gamma   113.314
_symmetry_Int_Tables_number   1
_cell_volume   1200.839
_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  0.593  0.219  0.578  1.0
  Pr  Pr1  1  0.407  0.781  0.422  1.0
  Pr  Pr2  1  0.941  0.383  0.821  1.0
  Pr  Pr3  1  0.059  0.617  0.179  1.0
  Pr  Pr4  1  0.687  0.452  0.921  1.0
  Pr  Pr5  1  0.313  0.548  0.079  1.0
  Pr  Pr6  1  0.072  0.756  0.899  1.0
  Pr  Pr7  1  0.928  0.244  0.101  1.0
  Pr  Pr8  1  0.305  0.417  0.363  1.0
  Pr  Pr9  1  0.695  0.583  0.637  1.0
  Pr  Pr10  1  0.680  0.708  0.312  1.0
  Pr  Pr11  1  0.320  0.292  0.688  1.0
  Pr  Pr12  1  0.469  0.936  0.169  1.0
  Pr  Pr13  1  0.531  0.064  0.831  1.0
  C  C14  1  0.605  0.269  0.767  1.0
  C  C15  1  0.395  0.731  0.233  1.0
  C  C16  1  0.982  0.439  0.023  1.0
  C  C17  1  0.018  0.561  0.977  1.0
  C  C18  1  0.642  0.390  0.721  1.0
  C  C19  1  0.358  0.610  0.279  1.0
  Br  Br20  1  0.671  0.454  0.434  1.0
  Br  Br21  1  0.329  0.546  0.566  1.0
  Br  Br22  1  0.059  0.636  0.702  1.0
  Br  Br23  1  0.941  0.364  0.298  1.0
  Br  Br24  1  0.944  0.254  0.626  1.0
  Br  Br25  1  0.056  0.746  0.374  1.0
  Br  Br26  1  0.716  0.721  0.829  1.0
  Br  Br27  1  0.284  0.279  0.171  1.0
  Br  Br28  1  0.319  0.421  0.878  1.0
  Br  Br29  1  0.681  0.579  0.122  1.0
  Br  Br30  1  0.558  0.190  0.035  1.0
  Br  Br31  1  0.442  0.810  0.965  1.0
  Br  Br32  1  0.518  0.065  0.366  1.0
  Br  Br33  1  0.482  0.935  0.634  1.0
  Br  Br34  1  0.890  0.104  0.907  1.0
  Br  Br35  1  0.110  0.896  0.093  1.0
  Br  Br36  1  0.178  0.025  0.774  1.0
  Br  Br37  1  0.822  0.975  0.226  1.0
  Br  Br38  1  0.228  0.155  0.483  1.0
  Br  Br39  1  0.772  0.845  0.517  1.0
[/CIF]
.
The compound described by Pr7C3Br10 crystallizes in the triclinic P-1 space group. There are seven inequivalent Pr sites. In the first Pr site, Pr(1) is bonded to one C(1), one C(3), one Br(1), one Br(10), one Br(3), and two equivalent Br(7) atoms to form distorted PrC2Br5 pentagonal bipyramids that share  a cornercorner with one Pr(7)CBr5 octahedra, corners with two equivalent Pr(6)C2Br5 pentagonal bipyramids,  an edgeedge with one Pr(7)CBr5 octahedra, edges with two equivalent Pr(5)CBr5 octahedra,  an edgeedge with one Pr(1)C2Br5 pentagonal bipyramid,  a faceface with one Pr(2)C4Br4 hexagonal bipyramid, and  a faceface with one Pr(6)C2Br5 pentagonal bipyramid. The corner-sharing octahedral tilt angles are 4°. In the second Pr site, Pr(2) is bonded to one C(1), one C(3), two equivalent C(2), one Br(2), one Br(3), one Br(5), and one Br(8) atom to form distorted PrC4Br4 hexagonal bipyramids that share  an edgeedge with one Pr(2)C4Br4 hexagonal bipyramid,  an edgeedge with one Pr(5)CBr5 octahedra,  an edgeedge with one Pr(7)CBr5 octahedra, edges with two equivalent Pr(4)CBr5 octahedra, edges with two equivalent Pr(6)C2Br5 pentagonal bipyramids, and  a faceface with one Pr(1)C2Br5 pentagonal bipyramid. In the third Pr site, Pr(3) is bonded in a 8-coordinate geometry to one C(1), one C(3), two equivalent C(2), one Br(4), one Br(6), and two equivalent Br(5) atoms. In the fourth Pr site, Pr(4) is bonded to one C(2), one Br(2), one Br(4), one Br(6), one Br(8), and one Br(9) atom to form distorted PrCBr5 octahedra that share  a cornercorner with one Pr(6)C2Br5 pentagonal bipyramid, edges with two equivalent Pr(2)C4Br4 hexagonal bipyramids,  an edgeedge with one Pr(5)CBr5 octahedra, and edges with two equivalent Pr(7)CBr5 octahedra. In the fifth Pr site, Pr(5) is bonded to one C(3), one Br(10), one Br(2), one Br(4), and two equivalent Br(1) atoms to form PrCBr5 octahedra that share  an edgeedge with one Pr(2)C4Br4 hexagonal bipyramid,  an edgeedge with one Pr(4)CBr5 octahedra,  an edgeedge with one Pr(5)CBr5 octahedra, edges with two equivalent Pr(1)C2Br5 pentagonal bipyramids, and edges with two equivalent Pr(6)C2Br5 pentagonal bipyramids. In the sixth Pr site, Pr(6) is bonded to one C(1), one C(3), one Br(1), one Br(10), one Br(3), one Br(5), and one Br(9) atom to form distorted PrC2Br5 pentagonal bipyramids that share  a cornercorner with one Pr(4)CBr5 octahedra, corners with two equivalent Pr(1)C2Br5 pentagonal bipyramids, edges with two equivalent Pr(2)C4Br4 hexagonal bipyramids,  an edgeedge with one Pr(7)CBr5 octahedra, edges with two equivalent Pr(5)CBr5 octahedra, and  a faceface with one Pr(1)C2Br5 pentagonal bipyramid. The corner-sharing octahedral tilt angles are 9°. In the seventh Pr site, Pr(7) is bonded to one C(1), one Br(7), one Br(8), one Br(9), and two equivalent Br(6) atoms to form PrCBr5 octahedra that share  a cornercorner with one Pr(1)C2Br5 pentagonal bipyramid,  an edgeedge with one Pr(2)C4Br4 hexagonal bipyramid,  an edgeedge with one Pr(7)CBr5 octahedra, edges with two equivalent Pr(4)CBr5 octahedra,  an edgeedge with one Pr(1)C2Br5 pentagonal bipyramid, and  an edgeedge with one Pr(6)C2Br5 pentagonal bipyramid. There are three inequivalent C sites. In the first C site, C(1) is bonded in a 6-coordinate geometry to one Pr(1), one Pr(2), one Pr(3), one Pr(6), one Pr(7), and one C(3) atom. In the second C site, C(2) is bonded in a 6-coordinate geometry to one Pr(4), two equivalent Pr(2), two equivalent Pr(3), and one C(2) atom. In the third C site, C(3) is bonded in a 6-coordinate geometry to one Pr(1), one Pr(2), one Pr(3), one Pr(5), one Pr(6), and one C(1) atom. There are ten inequivalent Br sites. In the first Br site, Br(1) is bonded in a rectangular see-saw-like geometry to one Pr(1), one Pr(6), and two equivalent Pr(5) atoms. In the second Br site, Br(2) is bonded in a distorted T-shaped geometry to one Pr(2), one Pr(4), and one Pr(5) atom. In the third Br site, Br(3) is bonded in a distorted T-shaped geometry to one Pr(1), one Pr(2), and one Pr(6) atom. In the fourth Br site, Br(4) is bonded in a distorted T-shaped geometry to one Pr(3), one Pr(4), and one Pr(5) atom. In the fifth Br site, Br(5) is bonded in a square co-planar geometry to one Pr(2), one Pr(6), and two equivalent Pr(3) atoms. In the sixth Br site, Br(6) is bonded in a rectangular see-saw-like geometry to one Pr(3), one Pr(4), and two equivalent Pr(7) atoms. In the seventh Br site, Br(7) is bonded in a distorted T-shaped geometry to one Pr(7) and two equivalent Pr(1) atoms. In the eighth Br site, Br(8) is bonded in a distorted T-shaped geometry to one Pr(2), one Pr(4), and one Pr(7) atom. In the ninth Br site, Br(9) is bonded in a T-shaped geometry to one Pr(4), one Pr(6), and one Pr(7) atom. In the tenth Br site, Br(10) is bonded in a distorted T-shaped geometry to one Pr(1), one Pr(5), and one Pr(6) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Pr7C3Br10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.180
_cell_length_b   11.117
_cell_length_c   13.479
_cell_angle_alpha   86.209
_cell_angle_beta   107.731
_cell_angle_gamma   113.314
_symmetry_Int_Tables_number   1
_cell_volume   1200.839
_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  0.593  0.219  0.578  1.0
  Pr  Pr1  1  0.407  0.781  0.422  1.0
  Pr  Pr2  1  0.941  0.383  0.821  1.0
  Pr  Pr3  1  0.059  0.617  0.179  1.0
  Pr  Pr4  1  0.687  0.452  0.921  1.0
  Pr  Pr5  1  0.313  0.548  0.079  1.0
  Pr  Pr6  1  0.072  0.756  0.899  1.0
  Pr  Pr7  1  0.928  0.244  0.101  1.0
  Pr  Pr8  1  0.305  0.417  0.363  1.0
  Pr  Pr9  1  0.695  0.583  0.637  1.0
  Pr  Pr10  1  0.680  0.708  0.312  1.0
  Pr  Pr11  1  0.320  0.292  0.688  1.0
  Pr  Pr12  1  0.469  0.936  0.169  1.0
  Pr  Pr13  1  0.531  0.064  0.831  1.0
  C  C14  1  0.605  0.269  0.767  1.0
  C  C15  1  0.395  0.731  0.233  1.0
  C  C16  1  0.982  0.439  0.023  1.0
  C  C17  1  0.018  0.561  0.977  1.0
  C  C18  1  0.642  0.390  0.721  1.0
  C  C19  1  0.358  0.610  0.279  1.0
  Br  Br20  1  0.671  0.454  0.434  1.0
  Br  Br21  1  0.329  0.546  0.566  1.0
  Br  Br22  1  0.059  0.636  0.702  1.0
  Br  Br23  1  0.941  0.364  0.298  1.0
  Br  Br24  1  0.944  0.254  0.626  1.0
  Br  Br25  1  0.056  0.746  0.374  1.0
  Br  Br26  1  0.716  0.721  0.829  1.0
  Br  Br27  1  0.284  0.279  0.171  1.0
  Br  Br28  1  0.319  0.421  0.878  1.0
  Br  Br29  1  0.681  0.579  0.122  1.0
  Br  Br30  1  0.558  0.190  0.035  1.0
  Br  Br31  1  0.442  0.810  0.965  1.0
  Br  Br32  1  0.518  0.065  0.366  1.0
  Br  Br33  1  0.482  0.935  0.634  1.0
  Br  Br34  1  0.890  0.104  0.907  1.0
  Br  Br35  1  0.110  0.896  0.093  1.0
  Br  Br36  1  0.178  0.025  0.774  1.0
  Br  Br37  1  0.822  0.975  0.226  1.0
  Br  Br38  1  0.228  0.155  0.483  1.0
  Br  Br39  1  0.772  0.845  0.517  1.0
[/CIF]
.