data_[Pm28Si4S20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Si  1.9000  1.1000  0.5400
  S  2.5800  1.0000  0.8800
]
_symmetry_space_group_name_H-M [Cmcm]
_cell_length_a [4.0564]
_cell_length_b [13.2176]
_cell_length_c [23.8704]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [Pm7SiS5]
_chemical_formula_sum '[Pm28 Si4 S20]'
_cell_volume [1279.8163]
_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  8  0.0000  0.1376  0.0369  1
  Pm  Pm1  8  0.0000  0.3124  0.6783  1
  Pm  Pm2  8  0.0000  0.4087  0.1122  1
  Pm  Pm3  4  0.0000  0.0350  0.7500  1
  Si  Si4  4  0.0000  0.3052  0.2500  1
  S  S5  8  0.0000  0.0476  0.1429  1
  S  S6  8  0.0000  0.2260  0.5717  1
  S  S7  4  0.0000  0.5000  0.0000  1
]