data_[Na24Zr12Si18O72]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Zr  1.3300  1.5500  0.8600
  Si  1.9000  1.1000  0.5400
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [R-3c]
_cell_length_a [9.2260]
_cell_length_b [9.2260]
_cell_length_c [21.8980]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [167]
_chemical_formula_structural [Na4Zr2(SiO4)3]
_chemical_formula_sum '[Na24 Zr12 Si18 O72]'
_cell_volume [1614.2099]
_cell_formula_units_Z [6]
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  18  0.0000  0.3651  0.2500  1
  Na  Na1  6  0.0000  0.0000  0.0000  1
  Zr  Zr2  12  0.0000  0.0000  0.1460  1
  Si  Si3  18  0.0000  0.3001  0.7500  1
  O  O4  36  0.0085  0.2005  0.6895  1
  O  O5  36  0.0152  0.1816  0.4188  1
]