data_Al2GaOs
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.22
_cell_length_b   3.22
_cell_length_c   5.59
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Al2GaOs
_chemical_formula_sum   'Al2 Ga1 Os1'
_cell_volume   57.89
_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
  Al  Al0  1  0.61  0.61  0.15  1.0
  Al  Al1  1  0.61  0.61  0.44  1.0
  Ga  Ga2  1  0.0  0.0  0.0  1.0
  Os  Os3  1  0.0  0.0  0.79  1.0

data_Al2GaOs
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.55
_cell_length_b   4.55
_cell_length_c   5.59
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Al2GaOs
_chemical_formula_sum   'Al4 Ga2 Os2'
_cell_volume   115.78
_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
  Al  Al0  2  0.11  0.5  0.15  1.0
  Al  Al1  2  0.11  0.5  0.44  1.0
  Ga  Ga2  2  0.0  0.0  0.0  1.0
  Os  Os3  2  0.0  0.0  0.79  1.0

Al Al Ga Os
OsGaAl2 crystallizes in the monoclinic Cm space group. Os(1) is bonded in a single-bond geometry to one Ga(1) and three equivalent Al(2) atoms. The Os(1)-Ga(1) bond length is 1.15 Å. There is one shorter (2.65 Å) and two longer (3.05 Å) Os(1)-Al(2) bond lengths. Ga(1) is bonded in a distorted single-bond geometry to one Os(1) and four equivalent Al(1) atoms. There are a spread of Ga(1)-Al(1) bond distances ranging from 1.96-2.89 Å. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 5-coordinate geometry to four equivalent Ga(1) and one Al(2) atom. The Al(1)-Al(2) bond length is 1.65 Å. In the second Al site, Al(2) is bonded in a 4-coordinate geometry to three equivalent Os(1) and one Al(1) atom.