The material structure described by MgPrFe2Al7 crystallizes in the orthorhombic Pbam space group. Mg(1) is bonded in a 13-coordinate geometry to one Fe(1), two equivalent Fe(2), two equivalent Al(1), two equivalent Al(2), two equivalent Al(5), two equivalent Al(7), and two equivalent Al(8) atoms. Pr(1) is bonded in a 13-coordinate geometry to one Al(3), two equivalent Al(2), two equivalent Al(4), two equivalent Al(5), two equivalent Al(6), two equivalent Al(7), and two equivalent Al(8) atoms. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 9-coordinate geometry to one Mg(1), one Al(3), one Al(6), two equivalent Al(2), two equivalent Al(4), and two equivalent Al(7) atoms. In the second Fe site, Fe(2) is bonded in a 9-coordinate geometry to two equivalent Mg(1), one Al(6), two equivalent Al(1), two equivalent Al(5), and two equivalent Al(8) atoms. There are eight inequivalent Al sites. In the first Al site, Al(8) is bonded in a 12-coordinate geometry to two equivalent Mg(1), two equivalent Pr(1), two equivalent Fe(2), one Al(1), one Al(4), one Al(5), one Al(7), and two equivalent Al(6) atoms. In the second Al site, Al(1) is bonded to four equivalent Mg(1), four equivalent Fe(2), two equivalent Al(5), and two equivalent Al(8) atoms to form distorted face-sharing AlMg4Al4Fe4 cuboctahedra. In the third Al site, Al(2) is bonded in a 12-coordinate geometry to two equivalent Mg(1), two equivalent Pr(1), two equivalent Fe(1), one Al(5), one Al(7), two equivalent Al(3), and two equivalent Al(4) atoms. In the fourth Al site, Al(3) is bonded in a linear geometry to two equivalent Pr(1), two equivalent Fe(1), four equivalent Al(2), and four equivalent Al(4) atoms. In the fifth Al site, Al(4) is bonded in a 12-coordinate geometry to two equivalent Pr(1), two equivalent Fe(1), one Al(7), one Al(8), two equivalent Al(2), two equivalent Al(3), and two equivalent Al(6) atoms. In the sixth Al site, Al(5) is bonded in a 12-coordinate geometry to two equivalent Mg(1), two equivalent Pr(1), two equivalent Fe(2), one Al(1), one Al(2), one Al(7), one Al(8), and two equivalent Al(6) atoms. In the seventh Al site, Al(6) 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(8) atoms. In the eighth Al site, Al(7) is bonded in a 2-coordinate geometry to two equivalent Mg(1), two equivalent Pr(1), two equivalent Fe(1), one Al(2), one Al(4), one Al(5), and one Al(8) atom. is represented by the CIF file [CIF]
data_PrMgAl7Fe2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.012
_cell_length_b   12.971
_cell_length_c   14.507
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   755.004
_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  0.840  0.181  1.0
  Pr  Pr1  1  0.000  0.160  0.819  1.0
  Pr  Pr2  1  0.000  0.340  0.319  1.0
  Pr  Pr3  1  0.000  0.660  0.681  1.0
  Mg  Mg4  1  0.000  0.832  0.452  1.0
  Mg  Mg5  1  0.000  0.168  0.548  1.0
  Mg  Mg6  1  0.000  0.332  0.048  1.0
  Mg  Mg7  1  0.000  0.668  0.952  1.0
  Al  Al8  1  0.500  0.500  0.000  1.0
  Al  Al9  1  0.500  0.000  0.500  1.0
  Al  Al10  1  0.500  0.835  0.006  1.0
  Al  Al11  1  0.500  0.165  0.994  1.0
  Al  Al12  1  0.500  0.335  0.494  1.0
  Al  Al13  1  0.500  0.665  0.506  1.0
  Al  Al14  1  0.000  0.500  0.500  1.0
  Al  Al15  1  0.000  0.000  0.000  1.0
  Al  Al16  1  0.500  0.525  0.367  1.0
  Al  Al17  1  0.500  0.475  0.633  1.0
  Al  Al18  1  0.500  0.025  0.133  1.0
  Al  Al19  1  0.500  0.975  0.867  1.0
  Al  Al20  1  0.500  0.657  0.120  1.0
  Al  Al21  1  0.500  0.343  0.880  1.0
  Al  Al22  1  0.500  0.157  0.380  1.0
  Al  Al23  1  0.500  0.843  0.620  1.0
  Al  Al24  1  0.000  0.593  0.245  1.0
  Al  Al25  1  0.000  0.407  0.755  1.0
  Al  Al26  1  0.000  0.093  0.255  1.0
  Al  Al27  1  0.000  0.907  0.745  1.0
  Al  Al28  1  0.500  0.729  0.326  1.0
  Al  Al29  1  0.500  0.271  0.674  1.0
  Al  Al30  1  0.500  0.229  0.174  1.0
  Al  Al31  1  0.500  0.771  0.826  1.0
  Al  Al32  1  0.500  0.952  0.322  1.0
  Al  Al33  1  0.500  0.048  0.678  1.0
  Al  Al34  1  0.500  0.452  0.178  1.0
  Al  Al35  1  0.500  0.548  0.822  1.0
  Fe  Fe36  1  0.000  0.639  0.399  1.0
  Fe  Fe37  1  0.000  0.361  0.601  1.0
  Fe  Fe38  1  0.000  0.139  0.101  1.0
  Fe  Fe39  1  0.000  0.861  0.899  1.0
  Fe  Fe40  1  0.000  0.534  0.092  1.0
  Fe  Fe41  1  0.000  0.466  0.908  1.0
  Fe  Fe42  1  0.000  0.034  0.408  1.0
  Fe  Fe43  1  0.000  0.966  0.592  1.0
[/CIF]
.
The material structure described by MgPrFe2Al7 crystallizes in the orthorhombic Pbam space group. Mg(1) is bonded in a 13-coordinate geometry to one Fe(1), two equivalent Fe(2), two equivalent Al(1), two equivalent Al(2), two equivalent Al(5), two equivalent Al(7), and two equivalent Al(8) atoms. Pr(1) is bonded in a 13-coordinate geometry to one Al(3), two equivalent Al(2), two equivalent Al(4), two equivalent Al(5), two equivalent Al(6), two equivalent Al(7), and two equivalent Al(8) atoms. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 9-coordinate geometry to one Mg(1), one Al(3), one Al(6), two equivalent Al(2), two equivalent Al(4), and two equivalent Al(7) atoms. In the second Fe site, Fe(2) is bonded in a 9-coordinate geometry to two equivalent Mg(1), one Al(6), two equivalent Al(1), two equivalent Al(5), and two equivalent Al(8) atoms. There are eight inequivalent Al sites. In the first Al site, Al(8) is bonded in a 12-coordinate geometry to two equivalent Mg(1), two equivalent Pr(1), two equivalent Fe(2), one Al(1), one Al(4), one Al(5), one Al(7), and two equivalent Al(6) atoms. In the second Al site, Al(1) is bonded to four equivalent Mg(1), four equivalent Fe(2), two equivalent Al(5), and two equivalent Al(8) atoms to form distorted face-sharing AlMg4Al4Fe4 cuboctahedra. In the third Al site, Al(2) is bonded in a 12-coordinate geometry to two equivalent Mg(1), two equivalent Pr(1), two equivalent Fe(1), one Al(5), one Al(7), two equivalent Al(3), and two equivalent Al(4) atoms. In the fourth Al site, Al(3) is bonded in a linear geometry to two equivalent Pr(1), two equivalent Fe(1), four equivalent Al(2), and four equivalent Al(4) atoms. In the fifth Al site, Al(4) is bonded in a 12-coordinate geometry to two equivalent Pr(1), two equivalent Fe(1), one Al(7), one Al(8), two equivalent Al(2), two equivalent Al(3), and two equivalent Al(6) atoms. In the sixth Al site, Al(5) is bonded in a 12-coordinate geometry to two equivalent Mg(1), two equivalent Pr(1), two equivalent Fe(2), one Al(1), one Al(2), one Al(7), one Al(8), and two equivalent Al(6) atoms. In the seventh Al site, Al(6) 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(8) atoms. In the eighth Al site, Al(7) is bonded in a 2-coordinate geometry to two equivalent Mg(1), two equivalent Pr(1), two equivalent Fe(1), one Al(2), one Al(4), one Al(5), and one Al(8) atom. is represented by the CIF file [CIF]
data_PrMgAl7Fe2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.012
_cell_length_b   12.971
_cell_length_c   14.507
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   755.004
_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  0.840  0.181  1.0
  Pr  Pr1  1  0.000  0.160  0.819  1.0
  Pr  Pr2  1  0.000  0.340  0.319  1.0
  Pr  Pr3  1  0.000  0.660  0.681  1.0
  Mg  Mg4  1  0.000  0.832  0.452  1.0
  Mg  Mg5  1  0.000  0.168  0.548  1.0
  Mg  Mg6  1  0.000  0.332  0.048  1.0
  Mg  Mg7  1  0.000  0.668  0.952  1.0
  Al  Al8  1  0.500  0.500  0.000  1.0
  Al  Al9  1  0.500  0.000  0.500  1.0
  Al  Al10  1  0.500  0.835  0.006  1.0
  Al  Al11  1  0.500  0.165  0.994  1.0
  Al  Al12  1  0.500  0.335  0.494  1.0
  Al  Al13  1  0.500  0.665  0.506  1.0
  Al  Al14  1  0.000  0.500  0.500  1.0
  Al  Al15  1  0.000  0.000  0.000  1.0
  Al  Al16  1  0.500  0.525  0.367  1.0
  Al  Al17  1  0.500  0.475  0.633  1.0
  Al  Al18  1  0.500  0.025  0.133  1.0
  Al  Al19  1  0.500  0.975  0.867  1.0
  Al  Al20  1  0.500  0.657  0.120  1.0
  Al  Al21  1  0.500  0.343  0.880  1.0
  Al  Al22  1  0.500  0.157  0.380  1.0
  Al  Al23  1  0.500  0.843  0.620  1.0
  Al  Al24  1  0.000  0.593  0.245  1.0
  Al  Al25  1  0.000  0.407  0.755  1.0
  Al  Al26  1  0.000  0.093  0.255  1.0
  Al  Al27  1  0.000  0.907  0.745  1.0
  Al  Al28  1  0.500  0.729  0.326  1.0
  Al  Al29  1  0.500  0.271  0.674  1.0
  Al  Al30  1  0.500  0.229  0.174  1.0
  Al  Al31  1  0.500  0.771  0.826  1.0
  Al  Al32  1  0.500  0.952  0.322  1.0
  Al  Al33  1  0.500  0.048  0.678  1.0
  Al  Al34  1  0.500  0.452  0.178  1.0
  Al  Al35  1  0.500  0.548  0.822  1.0
  Fe  Fe36  1  0.000  0.639  0.399  1.0
  Fe  Fe37  1  0.000  0.361  0.601  1.0
  Fe  Fe38  1  0.000  0.139  0.101  1.0
  Fe  Fe39  1  0.000  0.861  0.899  1.0
  Fe  Fe40  1  0.000  0.534  0.092  1.0
  Fe  Fe41  1  0.000  0.466  0.908  1.0
  Fe  Fe42  1  0.000  0.034  0.408  1.0
  Fe  Fe43  1  0.000  0.966  0.592  1.0
[/CIF]
.