data_Li2YbOs
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.47
_cell_length_b   4.47
_cell_length_c   4.47
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Li2YbOs
_chemical_formula_sum   'Li2 Yb1 Os1'
_cell_volume   63.08
_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
  Li  Li0  1  0.58  0.58  0.58  1.0
  Li  Li1  1  0.74  0.74  0.74  1.0
  Yb  Yb3  1  0.0  0.0  0.0  1.0
  Os  Os2  1  0.16  0.16  0.16  1.0

data_Li2YbOs
_symmetry_space_group_name_H-M   R3m
_cell_length_a   4.47
_cell_length_b   4.47
_cell_length_c   10.94
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   Li2YbOs
_chemical_formula_sum   'Li6 Yb3 Os3'
_cell_volume   189.25
_cell_formula_units_Z   3
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-y, x-y, z'
  3  '-x+y, -x, z'
  4  '-y, -x, z'
  5  '-x+y, y, z'
  6  'x, x-y, z'
  7  'x+1/3, y+2/3, z+2/3'
  8  '-y+1/3, x-y+2/3, z+2/3'
  9  '-x+y+1/3, -x+2/3, z+2/3'
  10  '-y+1/3, -x+2/3, z+2/3'
  11  '-x+y+1/3, y+2/3, z+2/3'
  12  'x+1/3, x-y+2/3, z+2/3'
  13  'x+2/3, y+1/3, z+1/3'
  14  '-y+2/3, x-y+1/3, z+1/3'
  15  '-x+y+2/3, -x+1/3, z+1/3'
  16  '-y+2/3, -x+1/3, z+1/3'
  17  '-x+y+2/3, y+1/3, z+1/3'
  18  'x+2/3, x-y+1/3, z+1/3'
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  3  0.0  0.0  0.26  1.0
  Li  Li1  3  0.0  0.0  0.42  1.0
  Yb  Yb2  3  0.0  0.0  0.0  1.0
  Os  Os3  3  0.0  0.0  0.84  1.0

Li Li Yb Os
Li2YbOs crystallizes in the trigonal R3m space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to one Li(2) and three equivalent Os(1) atoms to form distorted corner-sharing LiLiOs3 tetrahedra. The Li(1)-Li(2) bond length is 1.75 Å. All Li(1)-Os(1) bond lengths are 2.75 Å. In the second Li site, Li(2) is bonded in a 8-coordinate geometry to one Li(1), four equivalent Yb(1), and three equivalent Os(1) atoms. There are three shorter (2.70 Å) and one longer (2.85 Å) Li(2)-Yb(1) bond length. All Li(2)-Os(1) bond lengths are 2.75 Å. Yb(1) is bonded in a single-bond geometry to four equivalent Li(2) and one Os(1) atom. The Yb(1)-Os(1) bond length is 1.75 Å. Os(1) is bonded in a distorted single-bond geometry to three equivalent Li(1), three equivalent Li(2), and one Yb(1) atom.