data_[Er2Tm8Se10]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Er  1.2400  1.7500  1.0300
  Tm  1.2500  1.7500  1.0950
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [I4/m]
_cell_length_a [8.9762]
_cell_length_b [8.9762]
_cell_length_c [5.6977]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [87]
_chemical_formula_structural [ErTm4Se5]
_chemical_formula_sum '[Er2 Tm8 Se10]'
_cell_volume [459.0780]
_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
[
  Er  Er0  2  0.0000  0.0000  0.0000  1
  Tm  Tm1  8  0.1008  0.2987  0.5000  1
  Se  Se2  8  0.0996  0.3017  0.0000  1
  Se  Se3  2  0.0000  0.0000  0.5000  1
]