data_[Na12Ni9As3O24]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Ni  1.9100  1.3500  0.7400
  As  2.1800  1.1500  0.6600
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [R-3m]
_cell_length_a [6.0419]
_cell_length_b [6.0419]
_cell_length_c [15.9757]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [166]
_chemical_formula_structural [Na4Ni3AsO8]
_chemical_formula_sum '[Na12 Ni9 As3 O24]'
_cell_volume [505.0563]
_cell_formula_units_Z [3]
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  9  0.0000  0.5000  0.5000  1
  Na  Na1  3  -0.0000  -0.0000  0.5000  1
  Ni  Ni2  9  0.0000  0.5000  0.0000  1
  As  As3  3  -0.0000  -0.0000  0.0000  1
  O  O4  18  0.0297  0.5149  0.7327  1
  O  O5  6  0.0000  0.0000  0.2698  1
]