The crystal structure described by PrFeCu is Hexagonal Laves-derived structured and crystallizes in the orthorhombic Amm2 space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 12-coordinate geometry to one Fe(3), two equivalent Fe(1), two equivalent Fe(2), three equivalent Cu(1), and four equivalent Cu(2) atoms. In the second Pr site, Pr(2) is bonded in a 12-coordinate geometry to one Fe(1), two equivalent Fe(3), four equivalent Fe(2), two equivalent Cu(2), and three equivalent Cu(1) atoms. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent Pr(2), four equivalent Pr(1), two equivalent Cu(1), and four equivalent Cu(2) atoms to form FePr6Cu6 cuboctahedra that share corners with two equivalent Fe(3)Pr6Fe4Cu2 cuboctahedra, corners with four equivalent Fe(1)Pr6Cu6 cuboctahedra, corners with four equivalent Cu(1)Pr6Fe4Cu2 cuboctahedra, corners with eight equivalent Fe(2)Pr6Fe4Cu2 cuboctahedra, edges with two equivalent Fe(1)Pr6Cu6 cuboctahedra, edges with four equivalent Fe(3)Pr6Fe4Cu2 cuboctahedra, faces with four equivalent Fe(2)Pr6Fe4Cu2 cuboctahedra, faces with six equivalent Cu(1)Pr6Fe4Cu2 cuboctahedra, and faces with eight equivalent Cu(2)Pr6Fe2Cu4 cuboctahedra. In the second Fe site, Fe(2) is bonded to two equivalent Pr(1), four equivalent Pr(2), two equivalent Fe(2), two equivalent Fe(3), and two equivalent Cu(1) atoms to form FePr6Fe4Cu2 cuboctahedra that share corners with four equivalent Fe(1)Pr6Cu6 cuboctahedra, corners with four equivalent Fe(2)Pr6Fe4Cu2 cuboctahedra, corners with four equivalent Cu(1)Pr6Fe4Cu2 cuboctahedra, corners with six equivalent Cu(2)Pr6Fe2Cu4 cuboctahedra, edges with two equivalent Fe(2)Pr6Fe4Cu2 cuboctahedra, edges with four equivalent Cu(2)Pr6Fe2Cu4 cuboctahedra, faces with two equivalent Fe(1)Pr6Cu6 cuboctahedra, faces with two equivalent Cu(2)Pr6Fe2Cu4 cuboctahedra, faces with four equivalent Fe(2)Pr6Fe4Cu2 cuboctahedra, faces with four equivalent Fe(3)Pr6Fe4Cu2 cuboctahedra, and faces with six equivalent Cu(1)Pr6Fe4Cu2 cuboctahedra. In the third Fe site, Fe(3) is bonded to two equivalent Pr(1), four equivalent Pr(2), four equivalent Fe(2), and two equivalent Cu(1) atoms to form FePr6Fe4Cu2 cuboctahedra that share corners with two equivalent Fe(1)Pr6Cu6 cuboctahedra, corners with four equivalent Fe(3)Pr6Fe4Cu2 cuboctahedra, corners with four equivalent Cu(1)Pr6Fe4Cu2 cuboctahedra, corners with eight equivalent Cu(2)Pr6Fe2Cu4 cuboctahedra, edges with two equivalent Fe(3)Pr6Fe4Cu2 cuboctahedra, edges with four equivalent Fe(1)Pr6Cu6 cuboctahedra, faces with four equivalent Cu(2)Pr6Fe2Cu4 cuboctahedra, faces with six equivalent Cu(1)Pr6Fe4Cu2 cuboctahedra, and faces with eight equivalent Fe(2)Pr6Fe4Cu2 cuboctahedra. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to three equivalent Pr(1), three equivalent Pr(2), one Fe(1), one Fe(3), two equivalent Fe(2), and two equivalent Cu(2) atoms to form CuPr6Fe4Cu2 cuboctahedra that share corners with two equivalent Fe(1)Pr6Cu6 cuboctahedra, corners with two equivalent Fe(3)Pr6Fe4Cu2 cuboctahedra, corners with four equivalent Fe(2)Pr6Fe4Cu2 cuboctahedra, corners with four equivalent Cu(2)Pr6Fe2Cu4 cuboctahedra, edges with six equivalent Cu(1)Pr6Fe4Cu2 cuboctahedra, faces with two equivalent Cu(1)Pr6Fe4Cu2 cuboctahedra, faces with three equivalent Fe(1)Pr6Cu6 cuboctahedra, faces with three equivalent Fe(3)Pr6Fe4Cu2 cuboctahedra, faces with six equivalent Fe(2)Pr6Fe4Cu2 cuboctahedra, and faces with six equivalent Cu(2)Pr6Fe2Cu4 cuboctahedra. In the second Cu site, Cu(2) is bonded to two equivalent Pr(2), four equivalent Pr(1), two equivalent Fe(1), two equivalent Cu(1), and two equivalent Cu(2) atoms to form CuPr6Fe2Cu4 cuboctahedra that share corners with four equivalent Fe(3)Pr6Fe4Cu2 cuboctahedra, corners with four equivalent Cu(2)Pr6Fe2Cu4 cuboctahedra, corners with four equivalent Cu(1)Pr6Fe4Cu2 cuboctahedra, corners with six equivalent Fe(2)Pr6Fe4Cu2 cuboctahedra, edges with two equivalent Cu(2)Pr6Fe2Cu4 cuboctahedra, edges with four equivalent Fe(2)Pr6Fe4Cu2 cuboctahedra, faces with two equivalent Fe(2)Pr6Fe4Cu2 cuboctahedra, faces with two equivalent Fe(3)Pr6Fe4Cu2 cuboctahedra, faces with four equivalent Fe(1)Pr6Cu6 cuboctahedra, faces with four equivalent Cu(2)Pr6Fe2Cu4 cuboctahedra, and faces with six equivalent Cu(1)Pr6Fe4Cu2 cuboctahedra. is represented by the CIF file [CIF]
data_PrFeCu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.278
_cell_length_b   5.278
_cell_length_c   8.774
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   59.789
_symmetry_Int_Tables_number   1
_cell_volume   211.220
_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  0.333  0.333  0.561  1.0
  Pr  Pr1  1  0.667  0.667  0.438  1.0
  Pr  Pr2  1  0.667  0.667  0.062  1.0
  Pr  Pr3  1  0.333  0.333  0.939  1.0
  Fe  Fe4  1  0.838  0.838  0.750  1.0
  Fe  Fe5  1  0.164  0.673  0.250  1.0
  Fe  Fe6  1  0.673  0.164  0.250  1.0
  Fe  Fe7  1  0.164  0.164  0.250  1.0
  Cu  Cu8  1  0.998  0.998  0.496  1.0
  Cu  Cu9  1  0.998  0.998  0.004  1.0
  Cu  Cu10  1  0.837  0.327  0.750  1.0
  Cu  Cu11  1  0.327  0.837  0.750  1.0
[/CIF]
.
The crystal structure described by PrFeCu is Hexagonal Laves-derived structured and crystallizes in the orthorhombic Amm2 space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 12-coordinate geometry to one Fe(3), two equivalent Fe(1), two equivalent Fe(2), three equivalent Cu(1), and four equivalent Cu(2) atoms. In the second Pr site, Pr(2) is bonded in a 12-coordinate geometry to one Fe(1), two equivalent Fe(3), four equivalent Fe(2), two equivalent Cu(2), and three equivalent Cu(1) atoms. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent Pr(2), four equivalent Pr(1), two equivalent Cu(1), and four equivalent Cu(2) atoms to form FePr6Cu6 cuboctahedra that share corners with two equivalent Fe(3)Pr6Fe4Cu2 cuboctahedra, corners with four equivalent Fe(1)Pr6Cu6 cuboctahedra, corners with four equivalent Cu(1)Pr6Fe4Cu2 cuboctahedra, corners with eight equivalent Fe(2)Pr6Fe4Cu2 cuboctahedra, edges with two equivalent Fe(1)Pr6Cu6 cuboctahedra, edges with four equivalent Fe(3)Pr6Fe4Cu2 cuboctahedra, faces with four equivalent Fe(2)Pr6Fe4Cu2 cuboctahedra, faces with six equivalent Cu(1)Pr6Fe4Cu2 cuboctahedra, and faces with eight equivalent Cu(2)Pr6Fe2Cu4 cuboctahedra. In the second Fe site, Fe(2) is bonded to two equivalent Pr(1), four equivalent Pr(2), two equivalent Fe(2), two equivalent Fe(3), and two equivalent Cu(1) atoms to form FePr6Fe4Cu2 cuboctahedra that share corners with four equivalent Fe(1)Pr6Cu6 cuboctahedra, corners with four equivalent Fe(2)Pr6Fe4Cu2 cuboctahedra, corners with four equivalent Cu(1)Pr6Fe4Cu2 cuboctahedra, corners with six equivalent Cu(2)Pr6Fe2Cu4 cuboctahedra, edges with two equivalent Fe(2)Pr6Fe4Cu2 cuboctahedra, edges with four equivalent Cu(2)Pr6Fe2Cu4 cuboctahedra, faces with two equivalent Fe(1)Pr6Cu6 cuboctahedra, faces with two equivalent Cu(2)Pr6Fe2Cu4 cuboctahedra, faces with four equivalent Fe(2)Pr6Fe4Cu2 cuboctahedra, faces with four equivalent Fe(3)Pr6Fe4Cu2 cuboctahedra, and faces with six equivalent Cu(1)Pr6Fe4Cu2 cuboctahedra. In the third Fe site, Fe(3) is bonded to two equivalent Pr(1), four equivalent Pr(2), four equivalent Fe(2), and two equivalent Cu(1) atoms to form FePr6Fe4Cu2 cuboctahedra that share corners with two equivalent Fe(1)Pr6Cu6 cuboctahedra, corners with four equivalent Fe(3)Pr6Fe4Cu2 cuboctahedra, corners with four equivalent Cu(1)Pr6Fe4Cu2 cuboctahedra, corners with eight equivalent Cu(2)Pr6Fe2Cu4 cuboctahedra, edges with two equivalent Fe(3)Pr6Fe4Cu2 cuboctahedra, edges with four equivalent Fe(1)Pr6Cu6 cuboctahedra, faces with four equivalent Cu(2)Pr6Fe2Cu4 cuboctahedra, faces with six equivalent Cu(1)Pr6Fe4Cu2 cuboctahedra, and faces with eight equivalent Fe(2)Pr6Fe4Cu2 cuboctahedra. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to three equivalent Pr(1), three equivalent Pr(2), one Fe(1), one Fe(3), two equivalent Fe(2), and two equivalent Cu(2) atoms to form CuPr6Fe4Cu2 cuboctahedra that share corners with two equivalent Fe(1)Pr6Cu6 cuboctahedra, corners with two equivalent Fe(3)Pr6Fe4Cu2 cuboctahedra, corners with four equivalent Fe(2)Pr6Fe4Cu2 cuboctahedra, corners with four equivalent Cu(2)Pr6Fe2Cu4 cuboctahedra, edges with six equivalent Cu(1)Pr6Fe4Cu2 cuboctahedra, faces with two equivalent Cu(1)Pr6Fe4Cu2 cuboctahedra, faces with three equivalent Fe(1)Pr6Cu6 cuboctahedra, faces with three equivalent Fe(3)Pr6Fe4Cu2 cuboctahedra, faces with six equivalent Fe(2)Pr6Fe4Cu2 cuboctahedra, and faces with six equivalent Cu(2)Pr6Fe2Cu4 cuboctahedra. In the second Cu site, Cu(2) is bonded to two equivalent Pr(2), four equivalent Pr(1), two equivalent Fe(1), two equivalent Cu(1), and two equivalent Cu(2) atoms to form CuPr6Fe2Cu4 cuboctahedra that share corners with four equivalent Fe(3)Pr6Fe4Cu2 cuboctahedra, corners with four equivalent Cu(2)Pr6Fe2Cu4 cuboctahedra, corners with four equivalent Cu(1)Pr6Fe4Cu2 cuboctahedra, corners with six equivalent Fe(2)Pr6Fe4Cu2 cuboctahedra, edges with two equivalent Cu(2)Pr6Fe2Cu4 cuboctahedra, edges with four equivalent Fe(2)Pr6Fe4Cu2 cuboctahedra, faces with two equivalent Fe(2)Pr6Fe4Cu2 cuboctahedra, faces with two equivalent Fe(3)Pr6Fe4Cu2 cuboctahedra, faces with four equivalent Fe(1)Pr6Cu6 cuboctahedra, faces with four equivalent Cu(2)Pr6Fe2Cu4 cuboctahedra, and faces with six equivalent Cu(1)Pr6Fe4Cu2 cuboctahedra. is represented by the CIF file [CIF]
data_PrFeCu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.278
_cell_length_b   5.278
_cell_length_c   8.774
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   59.789
_symmetry_Int_Tables_number   1
_cell_volume   211.220
_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  0.333  0.333  0.561  1.0
  Pr  Pr1  1  0.667  0.667  0.438  1.0
  Pr  Pr2  1  0.667  0.667  0.062  1.0
  Pr  Pr3  1  0.333  0.333  0.939  1.0
  Fe  Fe4  1  0.838  0.838  0.750  1.0
  Fe  Fe5  1  0.164  0.673  0.250  1.0
  Fe  Fe6  1  0.673  0.164  0.250  1.0
  Fe  Fe7  1  0.164  0.164  0.250  1.0
  Cu  Cu8  1  0.998  0.998  0.496  1.0
  Cu  Cu9  1  0.998  0.998  0.004  1.0
  Cu  Cu10  1  0.837  0.327  0.750  1.0
  Cu  Cu11  1  0.327  0.837  0.750  1.0
[/CIF]
.