The material structure described by PmSi3 crystallizes in the hexagonal P6_3/mmc space group. Pm(1) is bonded to twelve equivalent Si(1) atoms to form a mixture of distorted face and corner-sharing PmSi12 cuboctahedra. Si(1) is bonded in a 10-coordinate geometry to four equivalent Pm(1) and six equivalent Si(1) atoms. is represented by the CIF card [CIF]
data_PmSi3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.129
_cell_length_b   6.129
_cell_length_c   4.654
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   151.404
_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
  Pm  Pm0  1  0.667  0.333  0.250  1.0
  Pm  Pm1  1  0.333  0.667  0.750  1.0
  Si  Si2  1  0.866  0.135  0.750  1.0
  Si  Si3  1  0.269  0.134  0.750  1.0
  Si  Si4  1  0.866  0.731  0.750  1.0
  Si  Si5  1  0.134  0.865  0.250  1.0
  Si  Si6  1  0.731  0.866  0.250  1.0
  Si  Si7  1  0.134  0.269  0.250  1.0
[/CIF]
.
The material structure described by PmSi3 crystallizes in the hexagonal P6_3/mmc space group. Pm(1) is bonded to twelve equivalent Si(1) atoms to form a mixture of distorted face and corner-sharing PmSi12 cuboctahedra. Si(1) is bonded in a 10-coordinate geometry to four equivalent Pm(1) and six equivalent Si(1) atoms. is represented by the CIF card [CIF]
data_PmSi3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.129
_cell_length_b   6.129
_cell_length_c   4.654
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   151.404
_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
  Pm  Pm0  1  0.667  0.333  0.250  1.0
  Pm  Pm1  1  0.333  0.667  0.750  1.0
  Si  Si2  1  0.866  0.135  0.750  1.0
  Si  Si3  1  0.269  0.134  0.750  1.0
  Si  Si4  1  0.866  0.731  0.750  1.0
  Si  Si5  1  0.134  0.865  0.250  1.0
  Si  Si6  1  0.731  0.866  0.250  1.0
  Si  Si7  1  0.134  0.269  0.250  1.0
[/CIF]
.