data_[Pm1Er15Tm4]
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
  Tm  1.2500  1.7500  1.0950
]
_symmetry_space_group_name_H-M [P4/mmm]
_cell_length_a [4.9602]
_cell_length_b [4.9602]
_cell_length_c [24.8118]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [123]
_chemical_formula_structural [PmEr15Tm4]
_chemical_formula_sum '[Pm1 Er15 Tm4]'
_cell_volume [610.4621]
_cell_formula_units_Z [1]
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  0.0000  0.0000  0.0000  1
  Er  Er1  4  0.0000  0.5000  0.1018  1
  Er  Er2  4  0.0000  0.5000  0.3009  1
  Er  Er3  2  0.0000  0.5000  0.5000  1
  Er  Er4  2  0.5000  0.5000  0.2017  1
  Er  Er5  2  0.5000  0.5000  0.4004  1
  Er  Er6  1  0.5000  0.5000  0.0000  1
  Tm  Tm7  2  0.0000  0.0000  0.2012  1
  Tm  Tm8  2  0.0000  0.0000  0.4005  1
]