data_Li2Os
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.35
_cell_length_b   5.35
_cell_length_c   6.76
_cell_angle_alpha   101.62
_cell_angle_beta   101.62
_cell_angle_gamma   26.99
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Li2Os
_chemical_formula_sum   'Li4 Os2'
_cell_volume   86.12
_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
  Li  Li0  1  0.1  0.0  0.62  1.0
  Li  Li1  1  0.5  0.0  0.34  1.0
  Li  Li2  1  0.92  0.0  0.99  1.0
  Li  Li3  1  0.51  0.0  0.27  1.0
  Os  Os4  1  0.65  0.0  0.12  1.0
  Os  Os5  1  0.37  0.0  0.49  1.0

data_Li2Os
_symmetry_space_group_name_H-M   P-1
_cell_length_a   2.5
_cell_length_b   5.35
_cell_length_c   6.76
_cell_angle_alpha   101.62
_cell_angle_beta   90.0
_cell_angle_gamma   103.5
_symmetry_Int_Tables_number   2
_chemical_formula_structural   Li2Os
_chemical_formula_sum   'Li4 Os2'
_cell_volume   86.12
_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
  Li  Li0  2  0.0  0.0  0.47  1.0
  Li  Li1  2  0.0  0.41  0.19  1.0
  Os  Os2  2  0.0  0.14  0.32  1.0

Li Li Li Li Os Os
Li Li Li Li Os Os 0 5 o o o 1 3 o o o 1 5 o o o 2 4 o o + 3 4 o o o 
Li2Os crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of one Li2Os cluster. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded in a single-bond geometry to one Os(1) atom. The Li(1)-Os(1) bond length is 1.84 Å. In the second Li site, Li(2) is bonded in a bent 150 degrees geometry to one Li(2) and one Os(1) atom. The Li(2)-Li(2) bond length is 0.48 Å. The Li(2)-Os(1) bond length is 1.36 Å. Os(1) is bonded in a distorted bent 150 degrees geometry to one Li(1) and one Li(2) atom.