The structure described by Pm is alpha La structured and crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Pm sites. In the first Pm site, Pm(1) is bonded to six equivalent Pm(1) and six equivalent Pm(2) atoms to form a mixture of face, corner, and edge-sharing PmPm12 cuboctahedra. In the second Pm site, Pm(2) is bonded to six equivalent Pm(1) and six equivalent Pm(2) atoms to form a mixture of face, corner, and edge-sharing PmPm12 cuboctahedra. is represented by the CIF file [CIF]
data_Pm
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.676
_cell_length_b   3.676
_cell_length_c   11.799
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   138.094
_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
  Pm  Pm0  1  0.000  0.000  0.000  1.0
  Pm  Pm1  1  0.333  0.667  0.250  1.0
  Pm  Pm2  1  0.000  0.000  0.500  1.0
  Pm  Pm3  1  0.667  0.333  0.750  1.0
[/CIF]
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The structure described by Pm is alpha La structured and crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Pm sites. In the first Pm site, Pm(1) is bonded to six equivalent Pm(1) and six equivalent Pm(2) atoms to form a mixture of face, corner, and edge-sharing PmPm12 cuboctahedra. In the second Pm site, Pm(2) is bonded to six equivalent Pm(1) and six equivalent Pm(2) atoms to form a mixture of face, corner, and edge-sharing PmPm12 cuboctahedra. is represented by the CIF file [CIF]
data_Pm
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.676
_cell_length_b   3.676
_cell_length_c   11.799
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   138.094
_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
  Pm  Pm0  1  0.000  0.000  0.000  1.0
  Pm  Pm1  1  0.333  0.667  0.250  1.0
  Pm  Pm2  1  0.000  0.000  0.500  1.0
  Pm  Pm3  1  0.667  0.333  0.750  1.0
[/CIF]
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