The crystal structure described by PrNi4Al crystallizes in the orthorhombic Cmmm space group. Pr(1) is bonded in a 18-coordinate geometry to six equivalent Ni(1), eight equivalent Ni(2), and four equivalent Al(1) atoms. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 9-coordinate geometry to three equivalent Pr(1), four equivalent Ni(2), and two equivalent Al(1) atoms. In the second Ni site, Ni(2) is bonded to four equivalent Pr(1), two equivalent Ni(2), four equivalent Ni(1), and two equivalent Al(1) atoms to form a mixture of distorted face, corner, and edge-sharing NiPr4Al2Ni6 cuboctahedra. Al(1) is bonded in a 8-coordinate geometry to four equivalent Pr(1), four equivalent Ni(1), and four equivalent Ni(2) atoms. is represented by the CIF card [CIF]
data_PrAlNi4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.951
_cell_length_b   4.951
_cell_length_c   4.006
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   118.007
_symmetry_Int_Tables_number   1
_cell_volume   86.704
_cell_formula_units_Z   1
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  0.500  0.500  0.000  1.0
  Al  Al1  1  0.000  0.000  0.500  1.0
  Ni  Ni2  1  0.169  0.831  0.000  1.0
  Ni  Ni3  1  0.831  0.169  0.000  1.0
  Ni  Ni4  1  0.000  0.500  0.500  1.0
  Ni  Ni5  1  0.500  0.000  0.500  1.0
[/CIF]
.
The crystal structure described by PrNi4Al crystallizes in the orthorhombic Cmmm space group. Pr(1) is bonded in a 18-coordinate geometry to six equivalent Ni(1), eight equivalent Ni(2), and four equivalent Al(1) atoms. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 9-coordinate geometry to three equivalent Pr(1), four equivalent Ni(2), and two equivalent Al(1) atoms. In the second Ni site, Ni(2) is bonded to four equivalent Pr(1), two equivalent Ni(2), four equivalent Ni(1), and two equivalent Al(1) atoms to form a mixture of distorted face, corner, and edge-sharing NiPr4Al2Ni6 cuboctahedra. Al(1) is bonded in a 8-coordinate geometry to four equivalent Pr(1), four equivalent Ni(1), and four equivalent Ni(2) atoms. is represented by the CIF card [CIF]
data_PrAlNi4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.951
_cell_length_b   4.951
_cell_length_c   4.006
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   118.007
_symmetry_Int_Tables_number   1
_cell_volume   86.704
_cell_formula_units_Z   1
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  0.500  0.500  0.000  1.0
  Al  Al1  1  0.000  0.000  0.500  1.0
  Ni  Ni2  1  0.169  0.831  0.000  1.0
  Ni  Ni3  1  0.831  0.169  0.000  1.0
  Ni  Ni4  1  0.000  0.500  0.500  1.0
  Ni  Ni5  1  0.500  0.000  0.500  1.0
[/CIF]
.