data_[Na4Er4P4O16F4]
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
  P  2.1900  1.0000  0.5500
  O  3.4400  0.6000  1.2600
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [8.9594]
_cell_length_b [6.9482]
_cell_length_c [6.5018]
_cell_angle_alpha [90.0000]
_cell_angle_beta [106.1715]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [NaErPO4F]
_chemical_formula_sum '[Na4 Er4 P4 O16 F4]'
_cell_volume [388.7317]
_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  0.0000  0.2928  0.5000  1.0
  Er  Er1  4  0.2171  0.5000  0.1161  1.0
  P  P2  4  0.1543  0.0000  0.2761  1.0
  O  O3  8  0.1963  0.1765  0.1546  1.0
  O  O4  4  0.0190  0.0000  0.7303  1.0
  O  O5  4  0.2431  0.5000  0.4898  1.0
  F  F6  4  0.0178  0.5000  0.8126  1.0
]