data_Ta2AlOs
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.33
_cell_length_b   5.33
_cell_length_c   4.59
_cell_angle_alpha   113.76
_cell_angle_beta   113.76
_cell_angle_gamma   33.84
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ta2AlOs
_chemical_formula_sum   'Ta2 Al1 Os1'
_cell_volume   65.85
_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
  Ta  Ta2  1  0.11  0.0  0.02  1.0
  Ta  Ta3  1  0.14  0.0  0.17  1.0
  Al  Al0  1  0.01  0.0  0.98  1.0
  Os  Os1  1  0.14  0.0  0.08  1.0

data_Ta2AlOs
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.1
_cell_length_b   4.59
_cell_length_c   5.33
_cell_angle_alpha   113.76
_cell_angle_beta   106.92
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ta2AlOs
_chemical_formula_sum   'Ta2 Al1 Os1'
_cell_volume   65.85
_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
  Ta  Ta0  1  0.0  0.02  0.11  1.0
  Ta  Ta1  1  0.0  0.17  0.14  1.0
  Al  Al2  1  0.0  0.98  0.01  1.0
  Os  Os3  1  0.0  0.08  0.14  1.0

Ta Ta Al Os
Ta Ta Al Os 0 3 o o o 0 2 o o - 1 3 o o o 
Ta2OsAl crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one Ta2OsAl cluster. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a distorted bent 120 degrees geometry to one Os(1) and one Al(1) atom. The Ta(1)-Os(1) bond length is 0.25 Å. The Ta(1)-Al(1) bond length is 0.50 Å. In the second Ta site, Ta(2) is bonded in a single-bond geometry to one Os(1) atom. The Ta(2)-Os(1) bond length is 0.41 Å. Os(1) is bonded in a bent 150 degrees geometry to one Ta(1) and one Ta(2) atom. Al(1) is bonded in a single-bond geometry to one Ta(1) atom.