The crystal structure described by Pr3Cr is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded to four equivalent Pr(1), four equivalent Pr(2), and four equivalent Cr(1) atoms to form distorted PrPr8Cr4 cuboctahedra that share corners with twelve equivalent Pr(1)Pr8Cr4 cuboctahedra, edges with eight equivalent Pr(1)Pr8Cr4 cuboctahedra, edges with eight equivalent Cr(1)Pr12 cuboctahedra, faces with four equivalent Cr(1)Pr12 cuboctahedra, and faces with ten equivalent Pr(1)Pr8Cr4 cuboctahedra. In the second Pr site, Pr(2) is bonded in a distorted square co-planar geometry to eight equivalent Pr(1) and four equivalent Cr(1) atoms. Cr(1) is bonded to four equivalent Pr(2) and eight equivalent Pr(1) atoms to form CrPr12 cuboctahedra that share corners with four equivalent Cr(1)Pr12 cuboctahedra, edges with eight equivalent Cr(1)Pr12 cuboctahedra, edges with sixteen equivalent Pr(1)Pr8Cr4 cuboctahedra, faces with four equivalent Cr(1)Pr12 cuboctahedra, and faces with eight equivalent Pr(1)Pr8Cr4 cuboctahedra. is represented by the CIF file [CIF]
data_Pr3Cr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.248
_cell_length_b   6.248
_cell_length_c   6.248
_cell_angle_alpha   134.198
_cell_angle_beta   134.198
_cell_angle_gamma   66.779
_symmetry_Int_Tables_number   1
_cell_volume   123.354
_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  0.750  0.250  0.500  1.0
  Pr  Pr1  1  0.250  0.750  0.500  1.0
  Pr  Pr2  1  0.500  0.500  0.000  1.0
  Cr  Cr3  1  0.000  0.000  0.000  1.0
[/CIF]
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The crystal structure described by Pr3Cr is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded to four equivalent Pr(1), four equivalent Pr(2), and four equivalent Cr(1) atoms to form distorted PrPr8Cr4 cuboctahedra that share corners with twelve equivalent Pr(1)Pr8Cr4 cuboctahedra, edges with eight equivalent Pr(1)Pr8Cr4 cuboctahedra, edges with eight equivalent Cr(1)Pr12 cuboctahedra, faces with four equivalent Cr(1)Pr12 cuboctahedra, and faces with ten equivalent Pr(1)Pr8Cr4 cuboctahedra. In the second Pr site, Pr(2) is bonded in a distorted square co-planar geometry to eight equivalent Pr(1) and four equivalent Cr(1) atoms. Cr(1) is bonded to four equivalent Pr(2) and eight equivalent Pr(1) atoms to form CrPr12 cuboctahedra that share corners with four equivalent Cr(1)Pr12 cuboctahedra, edges with eight equivalent Cr(1)Pr12 cuboctahedra, edges with sixteen equivalent Pr(1)Pr8Cr4 cuboctahedra, faces with four equivalent Cr(1)Pr12 cuboctahedra, and faces with eight equivalent Pr(1)Pr8Cr4 cuboctahedra. is represented by the CIF file [CIF]
data_Pr3Cr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.248
_cell_length_b   6.248
_cell_length_c   6.248
_cell_angle_alpha   134.198
_cell_angle_beta   134.198
_cell_angle_gamma   66.779
_symmetry_Int_Tables_number   1
_cell_volume   123.354
_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  0.750  0.250  0.500  1.0
  Pr  Pr1  1  0.250  0.750  0.500  1.0
  Pr  Pr2  1  0.500  0.500  0.000  1.0
  Cr  Cr3  1  0.000  0.000  0.000  1.0
[/CIF]
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