The material described by Pr is alpha La structured and crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded to six equivalent Pr(1) and six equivalent Pr(2) atoms to form a mixture of corner, edge, and face-sharing PrPr12 cuboctahedra. In the second Pr site, Pr(2) is bonded to six equivalent Pr(1) and six equivalent Pr(2) atoms to form a mixture of corner, edge, and face-sharing PrPr12 cuboctahedra. is represented by the CIF file [CIF]
data_Pr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.748
_cell_length_b   3.748
_cell_length_c   12.014
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   146.183
_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  0.000  0.000  0.000  1.0
  Pr  Pr1  1  0.000  0.000  0.500  1.0
  Pr  Pr2  1  0.333  0.667  0.250  1.0
  Pr  Pr3  1  0.667  0.333  0.750  1.0
[/CIF]
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The material described by Pr is alpha La structured and crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded to six equivalent Pr(1) and six equivalent Pr(2) atoms to form a mixture of corner, edge, and face-sharing PrPr12 cuboctahedra. In the second Pr site, Pr(2) is bonded to six equivalent Pr(1) and six equivalent Pr(2) atoms to form a mixture of corner, edge, and face-sharing PrPr12 cuboctahedra. is represented by the CIF file [CIF]
data_Pr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.748
_cell_length_b   3.748
_cell_length_c   12.014
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   146.183
_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  0.000  0.000  0.000  1.0
  Pr  Pr1  1  0.000  0.000  0.500  1.0
  Pr  Pr2  1  0.333  0.667  0.250  1.0
  Pr  Pr3  1  0.667  0.333  0.750  1.0
[/CIF]
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