data_[Pm4As2Br2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  As  2.1800  1.1500  0.6600
  Br  2.9600  1.1500  0.8825
]
_symmetry_space_group_name_H-M [Pmmn]
_cell_length_a [4.1664]
_cell_length_b [7.3755]
_cell_length_c [7.4146]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [59]
_chemical_formula_structural [Pm2AsBr]
_chemical_formula_sum '[Pm4 As2 Br2]'
_cell_volume [227.8460]
_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  4  0.0000  0.2463  0.2145  1
  As  As1  2  0.0000  0.5000  0.9076  1
  Br  Br2  2  0.0000  0.0000  0.5750  1
]