data_[Na2Mg2Os4O16]
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
  Os  2.2000  1.3000  0.6730
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Cmmm]
_cell_length_a [6.7086]
_cell_length_b [6.9308]
_cell_length_c [6.2032]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [65]
_chemical_formula_structural [NaMg(OsO4)2]
_chemical_formula_sum '[Na2 Mg2 Os4 O16]'
_cell_volume [288.4248]
_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  0.5000  1.0
  Mg  Mg1  2  0.0000  0.0000  0.0000  1.0
  Os  Os2  4  0.0000  0.5000  0.2442  1.0
  O  O3  8  0.2325  0.0000  0.2258  1.0
  O  O4  4  0.0000  0.3045  0.0000  1.0
  O  O5  4  0.0000  0.3311  0.5000  1.0
]