data_[Na2Er2V2F12]
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
  V  1.6300  1.3500  0.7775
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [P4_2nm]
_cell_length_a [5.1042]
_cell_length_b [5.1042]
_cell_length_c [10.2336]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [102]
_chemical_formula_structural [NaErVF6]
_chemical_formula_sum '[Na2 Er2 V2 F12]'
_cell_volume [266.6123]
_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
[
  Na  Na0  2  0.0000  0.0000  0.9991  1
  Er  Er1  2  0.0000  0.0000  0.3323  1
  V  V2  2  0.0000  0.0000  0.6671  1
  F  F3  4  0.1841  0.8159  0.5017  1
  F  F4  4  0.1995  0.8005  0.8211  1
  F  F5  4  0.2056  0.7944  0.1779  1
]