The compound described by Pr3Si2 crystallizes in the tetragonal P4/mbm space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a square co-planar geometry to four equivalent Si(1) atoms. In the second Pr site, Pr(2) is bonded in a distorted hexagonal planar geometry to six equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to two equivalent Pr(1), six equivalent Pr(2), and one Si(1) atom. is represented by the CIF file [CIF]
data_Pr3Si2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.411
_cell_length_b   7.850
_cell_length_c   7.850
_cell_angle_alpha   89.997
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   271.837
_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  0.000  0.500  0.500  1.0
  Pr  Pr1  1  0.000  0.000  0.000  1.0
  Pr  Pr2  1  0.500  0.177  0.677  1.0
  Pr  Pr3  1  0.500  0.823  0.323  1.0
  Pr  Pr4  1  0.500  0.323  0.177  1.0
  Pr  Pr5  1  0.500  0.677  0.823  1.0
  Si  Si6  1  0.000  0.610  0.110  1.0
  Si  Si7  1  0.000  0.390  0.890  1.0
  Si  Si8  1  0.000  0.890  0.610  1.0
  Si  Si9  1  0.000  0.110  0.390  1.0
[/CIF]
.
The compound described by Pr3Si2 crystallizes in the tetragonal P4/mbm space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a square co-planar geometry to four equivalent Si(1) atoms. In the second Pr site, Pr(2) is bonded in a distorted hexagonal planar geometry to six equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to two equivalent Pr(1), six equivalent Pr(2), and one Si(1) atom. is represented by the CIF file [CIF]
data_Pr3Si2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.411
_cell_length_b   7.850
_cell_length_c   7.850
_cell_angle_alpha   89.997
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   271.837
_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  0.000  0.500  0.500  1.0
  Pr  Pr1  1  0.000  0.000  0.000  1.0
  Pr  Pr2  1  0.500  0.177  0.677  1.0
  Pr  Pr3  1  0.500  0.823  0.323  1.0
  Pr  Pr4  1  0.500  0.323  0.177  1.0
  Pr  Pr5  1  0.500  0.677  0.823  1.0
  Si  Si6  1  0.000  0.610  0.110  1.0
  Si  Si7  1  0.000  0.390  0.890  1.0
  Si  Si8  1  0.000  0.890  0.610  1.0
  Si  Si9  1  0.000  0.110  0.390  1.0
[/CIF]
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