data_[Li8Er2As2O12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Li  0.9800  1.4500  0.9000
  Er  1.2400  1.7500  1.0300
  As  2.1800  1.1500  0.6600
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2]
_cell_length_a [5.2466]
_cell_length_b [9.2989]
_cell_length_c [5.0902]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.5672]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [5]
_chemical_formula_structural [Li4ErAsO6]
_chemical_formula_sum '[Li8 Er2 As2 O12]'
_cell_volume [235.4113]
_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
[
  Li  Li0  2  0.0000  0.3530  0.5000  1
  Li  Li1  2  0.0000  0.4979  0.0000  1
  Li  Li2  2  0.0000  0.6865  0.5000  1
  Li  Li3  2  0.0000  0.9667  0.5000  1
  Er  Er4  2  0.0000  0.1628  0.0000  1
  As  As5  2  0.0000  0.8326  0.0000  1
  O  O6  4  0.2116  0.6896  0.2324  1
  O  O7  4  0.2188  0.9756  0.2313  1
  O  O8  4  0.2243  0.8351  0.7771  1
]