data_[Na4Mg4B4O12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Mg  1.3100  1.5000  0.8600
  B  2.0400  0.8500  0.4100
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [5.0651]
_cell_length_b [8.8803]
_cell_length_c [5.5916]
_cell_angle_alpha [90.0000]
_cell_angle_beta [99.3132]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [NaMgBO3]
_chemical_formula_sum '[Na4 Mg4 B4 O12]'
_cell_volume [248.1908]
_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  0.3349  0.2500  1.0
  Mg  Mg1  4  0.0000  0.0000  0.0000  1.0
  B  B2  4  0.0000  0.3327  0.7500  1.0
  O  O3  8  0.2243  0.4103  0.7040  1.0
  O  O4  4  0.0000  0.1764  0.7500  1.0
]