data_[Pm4Er8Te8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Er  1.2400  1.7500  1.0300
  Te  2.1000  1.4000  1.2933
]
_symmetry_space_group_name_H-M [Imma]
_cell_length_a [5.8139]
_cell_length_b [8.7282]
_cell_length_c [12.3633]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [74]
_chemical_formula_structural [Pm(ErTe)2]
_chemical_formula_sum '[Pm4 Er8 Te8]'
_cell_volume [627.3715]
_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  4  0.0000  0.2500  0.8481  1
  Er  Er1  8  0.0000  0.0546  0.3399  1
  Te  Te2  4  0.0000  0.2500  0.1320  1
  Te  Te3  4  0.0000  0.2500  0.5497  1
]