data_SiOs3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.52
_cell_length_b   8.52
_cell_length_c   8.52
_cell_angle_alpha   18.68
_cell_angle_beta   18.68
_cell_angle_gamma   18.68
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SiOs3
_chemical_formula_sum   'Si1 Os3'
_cell_volume   55.5
_cell_formula_units_Z   1
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  Si3  1  0.0  0.0  0.0  1.0
  Os  Os0  1  0.0  0.0  0.39  1.0
  Os  Os1  1  0.0  0.0  0.56  1.0
  Os  Os2  1  0.0  0.0  0.73  1.0

data_SiOs3
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.79
_cell_length_b   2.77
_cell_length_c   8.52
_cell_angle_alpha   90.0
_cell_angle_beta   100.8
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   SiOs3
_chemical_formula_sum   'Si2 Os6'
_cell_volume   111.0
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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  2  0.0  0.0  0.0  1.0
  Os  Os1  2  -0.0  0.0  0.27  1.0
  Os  Os2  2  -0.0  0.0  0.44  1.0
  Os  Os3  2  0.0  0.0  0.61  1.0

Si Os Os Os