data_[Si4Os8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Si  1.9000  1.1000  0.5400
  Os  2.2000  1.3000  0.6730
]
_symmetry_space_group_name_H-M [Pnma]
_cell_length_a [5.3215]
_cell_length_b [4.0626]
_cell_length_c [7.5452]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [62]
_chemical_formula_structural [SiOs2]
_chemical_formula_sum '[Si4 Os8]'
_cell_volume [163.1207]
_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
[
  Si  Si0  4  0.1905  0.7500  0.4043  1
  Os  Os1  4  0.0094  0.7500  0.7121  1
  Os  Os2  4  0.1640  0.7500  0.0642  1
]