data_[Er4Ti2Se8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Er  1.2400  1.7500  1.0300
  Ti  1.5400  1.4000  0.8517
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [14.2538]
_cell_length_b [3.9531]
_cell_length_c [7.1024]
_cell_angle_alpha [90.0000]
_cell_angle_beta [118.8731]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Er2TiSe4]
_chemical_formula_sum '[Er4 Ti2 Se8]'
_cell_volume [350.4451]
_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  4  0.2332  0.5000  0.7203  1
  Ti  Ti1  2  0.0000  0.0000  0.0000  1
  Se  Se2  4  0.1129  0.0000  0.4254  1
  Se  Se3  4  0.1256  0.5000  0.9763  1
]