The structure described by Pr3Si crystallizes in the hexagonal P6_3/mmc space group. Pr(1) is bonded in a 2-coordinate geometry to four equivalent Si(1) atoms. Si(1) is bonded to twelve equivalent Pr(1) atoms to form a mixture of distorted face and corner-sharing SiPr12 cuboctahedra. is represented by the CIF card [CIF]
data_Pr3Si
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.152
_cell_length_b   7.152
_cell_length_c   5.130
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   227.280
_cell_formula_units_Z   2
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  0.183  0.365  0.250  1.0
  Pr  Pr1  1  0.635  0.817  0.250  1.0
  Pr  Pr2  1  0.183  0.817  0.250  1.0
  Pr  Pr3  1  0.817  0.635  0.750  1.0
  Pr  Pr4  1  0.365  0.183  0.750  1.0
  Pr  Pr5  1  0.817  0.183  0.750  1.0
  Si  Si6  1  0.333  0.667  0.750  1.0
  Si  Si7  1  0.667  0.333  0.250  1.0
[/CIF]
.
The structure described by Pr3Si crystallizes in the hexagonal P6_3/mmc space group. Pr(1) is bonded in a 2-coordinate geometry to four equivalent Si(1) atoms. Si(1) is bonded to twelve equivalent Pr(1) atoms to form a mixture of distorted face and corner-sharing SiPr12 cuboctahedra. is represented by the CIF card [CIF]
data_Pr3Si
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.152
_cell_length_b   7.152
_cell_length_c   5.130
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   227.280
_cell_formula_units_Z   2
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  0.183  0.365  0.250  1.0
  Pr  Pr1  1  0.635  0.817  0.250  1.0
  Pr  Pr2  1  0.183  0.817  0.250  1.0
  Pr  Pr3  1  0.817  0.635  0.750  1.0
  Pr  Pr4  1  0.365  0.183  0.750  1.0
  Pr  Pr5  1  0.817  0.183  0.750  1.0
  Si  Si6  1  0.333  0.667  0.750  1.0
  Si  Si7  1  0.667  0.333  0.250  1.0
[/CIF]
.