The compound described by PrFe2Al8 crystallizes in the orthorhombic Pbam space group. Pr(1) is bonded in a 13-coordinate geometry to one Al(1), two equivalent Al(3), two equivalent Al(4), two equivalent Al(5), two equivalent Al(7), two equivalent Al(8), and two equivalent Al(9) atoms. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 9-coordinate geometry to one Al(1), one Al(6), one Al(7), two equivalent Al(3), two equivalent Al(8), and two equivalent Al(9) atoms. In the second Fe site, Fe(2) is bonded in a 9-coordinate geometry to one Al(7), two equivalent Al(2), two equivalent Al(4), two equivalent Al(5), and two equivalent Al(6) atoms. There are nine inequivalent Al sites. In the first Al site, Al(9) is bonded in a 12-coordinate geometry to two equivalent Pr(1), two equivalent Fe(1), one Al(3), one Al(4), two equivalent Al(1), two equivalent Al(7), and two equivalent Al(8) atoms. In the second Al site, Al(1) is bonded in a distorted linear geometry to two equivalent Pr(1), two equivalent Fe(1), four equivalent Al(8), and four equivalent Al(9) atoms. In the third Al site, Al(2) is bonded in a 4-coordinate geometry to four equivalent Fe(2), two equivalent Al(4), and two equivalent Al(5) atoms. In the fourth Al site, Al(3) is bonded in a 2-coordinate geometry to two equivalent Pr(1), two equivalent Fe(1), one Al(4), one Al(8), and one Al(9) atom. In the fifth Al site, Al(4) is bonded in a 10-coordinate geometry to two equivalent Pr(1), two equivalent Fe(2), one Al(2), one Al(3), one Al(5), one Al(9), and two equivalent Al(7) atoms. In the sixth Al site, Al(5) is bonded in a 9-coordinate geometry to two equivalent Pr(1), two equivalent Fe(2), one Al(2), one Al(4), one Al(8), and two equivalent Al(7) atoms. In the seventh Al site, Al(6) is bonded in a 3-coordinate geometry to one Fe(1), two equivalent Fe(2), and two equivalent Al(8) atoms. In the eighth Al site, Al(7) is bonded in a distorted linear geometry to two equivalent Pr(1), one Fe(1), one Fe(2), two equivalent Al(4), two equivalent Al(5), and two equivalent Al(9) atoms. In the ninth Al site, Al(8) is bonded in a 12-coordinate geometry to two equivalent Pr(1), two equivalent Fe(1), one Al(3), one Al(5), two equivalent Al(1), two equivalent Al(6), and two equivalent Al(9) atoms. is represented by the CIF file [CIF]
data_Pr(Al4Fe)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.040
_cell_length_b   12.460
_cell_length_c   14.280
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   718.804
_cell_formula_units_Z   4
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  0.000  0.841  0.182  1.0
  Pr  Pr1  1  0.000  0.159  0.818  1.0
  Pr  Pr2  1  0.000  0.341  0.318  1.0
  Pr  Pr3  1  0.000  0.659  0.682  1.0
  Al  Al4  1  0.000  0.500  0.500  1.0
  Al  Al5  1  0.000  0.000  0.000  1.0
  Al  Al6  1  0.500  0.500  0.000  1.0
  Al  Al7  1  0.500  0.000  0.500  1.0
  Al  Al8  1  0.500  0.733  0.328  1.0
  Al  Al9  1  0.500  0.267  0.672  1.0
  Al  Al10  1  0.500  0.233  0.172  1.0
  Al  Al11  1  0.500  0.767  0.828  1.0
  Al  Al12  1  0.500  0.953  0.321  1.0
  Al  Al13  1  0.500  0.047  0.679  1.0
  Al  Al14  1  0.500  0.453  0.179  1.0
  Al  Al15  1  0.500  0.547  0.821  1.0
  Al  Al16  1  0.500  0.658  0.120  1.0
  Al  Al17  1  0.500  0.342  0.880  1.0
  Al  Al18  1  0.500  0.158  0.380  1.0
  Al  Al19  1  0.500  0.842  0.620  1.0
  Al  Al20  1  0.000  0.832  0.454  1.0
  Al  Al21  1  0.000  0.168  0.546  1.0
  Al  Al22  1  0.000  0.332  0.046  1.0
  Al  Al23  1  0.000  0.668  0.954  1.0
  Al  Al24  1  0.000  0.594  0.245  1.0
  Al  Al25  1  0.000  0.406  0.755  1.0
  Al  Al26  1  0.000  0.094  0.255  1.0
  Al  Al27  1  0.000  0.906  0.745  1.0
  Al  Al28  1  0.500  0.833  0.006  1.0
  Al  Al29  1  0.500  0.167  0.994  1.0
  Al  Al30  1  0.500  0.333  0.494  1.0
  Al  Al31  1  0.500  0.667  0.506  1.0
  Al  Al32  1  0.500  0.527  0.367  1.0
  Al  Al33  1  0.500  0.473  0.633  1.0
  Al  Al34  1  0.500  0.027  0.133  1.0
  Al  Al35  1  0.500  0.973  0.867  1.0
  Fe  Fe36  1  0.000  0.648  0.401  1.0
  Fe  Fe37  1  0.000  0.352  0.599  1.0
  Fe  Fe38  1  0.000  0.148  0.099  1.0
  Fe  Fe39  1  0.000  0.852  0.901  1.0
  Fe  Fe40  1  0.000  0.531  0.086  1.0
  Fe  Fe41  1  0.000  0.469  0.914  1.0
  Fe  Fe42  1  0.000  0.031  0.414  1.0
  Fe  Fe43  1  0.000  0.969  0.586  1.0
[/CIF]
.
The compound described by PrFe2Al8 crystallizes in the orthorhombic Pbam space group. Pr(1) is bonded in a 13-coordinate geometry to one Al(1), two equivalent Al(3), two equivalent Al(4), two equivalent Al(5), two equivalent Al(7), two equivalent Al(8), and two equivalent Al(9) atoms. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 9-coordinate geometry to one Al(1), one Al(6), one Al(7), two equivalent Al(3), two equivalent Al(8), and two equivalent Al(9) atoms. In the second Fe site, Fe(2) is bonded in a 9-coordinate geometry to one Al(7), two equivalent Al(2), two equivalent Al(4), two equivalent Al(5), and two equivalent Al(6) atoms. There are nine inequivalent Al sites. In the first Al site, Al(9) is bonded in a 12-coordinate geometry to two equivalent Pr(1), two equivalent Fe(1), one Al(3), one Al(4), two equivalent Al(1), two equivalent Al(7), and two equivalent Al(8) atoms. In the second Al site, Al(1) is bonded in a distorted linear geometry to two equivalent Pr(1), two equivalent Fe(1), four equivalent Al(8), and four equivalent Al(9) atoms. In the third Al site, Al(2) is bonded in a 4-coordinate geometry to four equivalent Fe(2), two equivalent Al(4), and two equivalent Al(5) atoms. In the fourth Al site, Al(3) is bonded in a 2-coordinate geometry to two equivalent Pr(1), two equivalent Fe(1), one Al(4), one Al(8), and one Al(9) atom. In the fifth Al site, Al(4) is bonded in a 10-coordinate geometry to two equivalent Pr(1), two equivalent Fe(2), one Al(2), one Al(3), one Al(5), one Al(9), and two equivalent Al(7) atoms. In the sixth Al site, Al(5) is bonded in a 9-coordinate geometry to two equivalent Pr(1), two equivalent Fe(2), one Al(2), one Al(4), one Al(8), and two equivalent Al(7) atoms. In the seventh Al site, Al(6) is bonded in a 3-coordinate geometry to one Fe(1), two equivalent Fe(2), and two equivalent Al(8) atoms. In the eighth Al site, Al(7) is bonded in a distorted linear geometry to two equivalent Pr(1), one Fe(1), one Fe(2), two equivalent Al(4), two equivalent Al(5), and two equivalent Al(9) atoms. In the ninth Al site, Al(8) is bonded in a 12-coordinate geometry to two equivalent Pr(1), two equivalent Fe(1), one Al(3), one Al(5), two equivalent Al(1), two equivalent Al(6), and two equivalent Al(9) atoms. is represented by the CIF file [CIF]
data_Pr(Al4Fe)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.040
_cell_length_b   12.460
_cell_length_c   14.280
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   718.804
_cell_formula_units_Z   4
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  0.000  0.841  0.182  1.0
  Pr  Pr1  1  0.000  0.159  0.818  1.0
  Pr  Pr2  1  0.000  0.341  0.318  1.0
  Pr  Pr3  1  0.000  0.659  0.682  1.0
  Al  Al4  1  0.000  0.500  0.500  1.0
  Al  Al5  1  0.000  0.000  0.000  1.0
  Al  Al6  1  0.500  0.500  0.000  1.0
  Al  Al7  1  0.500  0.000  0.500  1.0
  Al  Al8  1  0.500  0.733  0.328  1.0
  Al  Al9  1  0.500  0.267  0.672  1.0
  Al  Al10  1  0.500  0.233  0.172  1.0
  Al  Al11  1  0.500  0.767  0.828  1.0
  Al  Al12  1  0.500  0.953  0.321  1.0
  Al  Al13  1  0.500  0.047  0.679  1.0
  Al  Al14  1  0.500  0.453  0.179  1.0
  Al  Al15  1  0.500  0.547  0.821  1.0
  Al  Al16  1  0.500  0.658  0.120  1.0
  Al  Al17  1  0.500  0.342  0.880  1.0
  Al  Al18  1  0.500  0.158  0.380  1.0
  Al  Al19  1  0.500  0.842  0.620  1.0
  Al  Al20  1  0.000  0.832  0.454  1.0
  Al  Al21  1  0.000  0.168  0.546  1.0
  Al  Al22  1  0.000  0.332  0.046  1.0
  Al  Al23  1  0.000  0.668  0.954  1.0
  Al  Al24  1  0.000  0.594  0.245  1.0
  Al  Al25  1  0.000  0.406  0.755  1.0
  Al  Al26  1  0.000  0.094  0.255  1.0
  Al  Al27  1  0.000  0.906  0.745  1.0
  Al  Al28  1  0.500  0.833  0.006  1.0
  Al  Al29  1  0.500  0.167  0.994  1.0
  Al  Al30  1  0.500  0.333  0.494  1.0
  Al  Al31  1  0.500  0.667  0.506  1.0
  Al  Al32  1  0.500  0.527  0.367  1.0
  Al  Al33  1  0.500  0.473  0.633  1.0
  Al  Al34  1  0.500  0.027  0.133  1.0
  Al  Al35  1  0.500  0.973  0.867  1.0
  Fe  Fe36  1  0.000  0.648  0.401  1.0
  Fe  Fe37  1  0.000  0.352  0.599  1.0
  Fe  Fe38  1  0.000  0.148  0.099  1.0
  Fe  Fe39  1  0.000  0.852  0.901  1.0
  Fe  Fe40  1  0.000  0.531  0.086  1.0
  Fe  Fe41  1  0.000  0.469  0.914  1.0
  Fe  Fe42  1  0.000  0.031  0.414  1.0
  Fe  Fe43  1  0.000  0.969  0.586  1.0
[/CIF]
.