data_OsRu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.66
_cell_length_b   4.35
_cell_length_c   5.1
_cell_angle_alpha   90.0
_cell_angle_beta   99.99
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   OsRu
_chemical_formula_sum   'Os2 Ru2'
_cell_volume   58.25
_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
  Os  Os0  1  0.89  0.26  0.39  1.0
  Os  Os1  1  0.89  0.09  0.63  1.0
  Ru  Ru2  1  0.78  0.09  0.14  1.0
  Ru  Ru3  1  0.0  0.26  0.89  1.0

data_OsRu
_symmetry_space_group_name_H-M   P-1
_cell_length_a   2.66
_cell_length_b   4.35
_cell_length_c   5.1
_cell_angle_alpha   90.0
_cell_angle_beta   99.99
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   2
_chemical_formula_structural   OsRu
_chemical_formula_sum   'Os2 Ru2'
_cell_volume   58.25
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-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
  Ru  Ru0  2  0.39  0.91  0.13  1.0
  Os  Os1  2  0.5  0.91  0.62  1.0

Os Os Ru Ru
Os Os Ru Ru 0 2 o o o 0 1 o o o 1 3 + o o 2 3 + o - 