data_[Na8V4Ni4F28]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  V  1.6300  1.3500  0.7775
  Ni  1.9100  1.3500  0.7400
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [Imma]
_cell_length_a [7.1389]
_cell_length_b [9.7809]
_cell_length_c [7.1026]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [74]
_chemical_formula_structural [Na2VNiF7]
_chemical_formula_sum '[Na8 V4 Ni4 F28]'
_cell_volume [495.9361]
_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  0.0000  0.0000  1
  Na  Na1  4  0.2500  0.2500  0.2500  1
  V  V2  4  0.0000  0.0000  0.5000  1
  Ni  Ni3  4  0.2500  0.2500  0.7500  1
  F  F4  16  0.2080  0.1155  0.5531  1
  F  F5  8  0.0000  0.0974  0.2650  1
  F  F6  4  0.0000  0.2500  0.8662  1
]