data_FeReOs2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.63
_cell_length_b   4.63
_cell_length_c   4.63
_cell_angle_alpha   131.4
_cell_angle_beta   131.4
_cell_angle_gamma   71.18
_symmetry_Int_Tables_number   1
_chemical_formula_structural   FeReOs2
_chemical_formula_sum   'Fe1 Re1 Os2'
_cell_volume   54.69
_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
  Fe  Fe0  1  0.0  0.0  0.0  1.0
  Re  Re3  1  0.0  0.0  0.77  1.0
  Os  Os1  1  0.91  0.0  0.88  1.0
  Os  Os2  1  0.0  0.91  0.88  1.0

data_FeReOs2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.39
_cell_length_b   5.39
_cell_length_c   4.63
_cell_angle_alpha   90.0
_cell_angle_beta   125.59
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   FeReOs2
_chemical_formula_sum   'Fe2 Re2 Os4'
_cell_volume   109.39
_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
  Fe  Fe0  2  0.0  0.0  0.0  1.0
  Re  Re1  2  0.23  0.0  0.23  1.0
  Os  Os2  4  0.07  0.05  0.02  1.0

Fe Re Os Os
ReOs2Fe is Indium-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two ReOs2Fe clusters. Re(1) is bonded in a 2-coordinate geometry to two equivalent Os(1) atoms. Both Re(1)-Os(1) bond lengths are 0.89 Å. Os(1) is bonded in a distorted single-bond geometry to one Re(1) and one Fe(1) atom. The Os(1)-Fe(1) bond length is 0.41 Å. Fe(1) is bonded in a distorted L-shaped geometry to two equivalent Os(1) atoms.