data_[Na4Er4S4O4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Er  1.2400  1.7500  1.0300
  S  2.5800  1.0000  0.8800
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2_1/c]
_cell_length_a [6.7831]
_cell_length_b [7.1832]
_cell_length_c [6.2275]
_cell_angle_alpha [90.0000]
_cell_angle_beta [103.8500]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [14]
_chemical_formula_structural [NaErSO]
_chemical_formula_sum '[Na4 Er4 S4 O4]'
_cell_volume [294.6053]
_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
[
  Na  Na0  4  0.4145  0.2464  0.5092  1
  Er  Er1  4  0.0372  0.6244  0.2342  1
  S  S2  4  0.2796  0.5864  0.6626  1
  O  O3  4  0.1162  0.1522  0.6187  1
]