data_Al2BOs
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.09
_cell_length_b   3.09
_cell_length_c   5.11
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Al2BOs
_chemical_formula_sum   'Al2 B1 Os1'
_cell_volume   48.84
_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  0.55  0.55  0.9  1.0
  Al  Al1  1  0.55  0.55  0.21  1.0
  B  B2  1  0.0  0.0  0.0  1.0
  Os  Os3  1  0.0  0.0  0.55  1.0

data_Al2BOs
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.37
_cell_length_b   4.37
_cell_length_c   5.11
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Al2BOs
_chemical_formula_sum   'Al4 B2 Os2'
_cell_volume   97.67
_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  0.05  0.5  0.21  1.0
  Al  Al1  2  0.05  0.5  0.9  1.0
  B  B2  2  0.0  0.0  0.0  1.0
  Os  Os3  2  0.0  0.0  0.55  1.0

Al Al B Os
OsAl2B crystallizes in the monoclinic Cm space group. Os(1) is bonded in a 10-coordinate geometry to four equivalent Al(1), four equivalent Al(2), and two equivalent B(1) atoms. There are a spread of Os(1)-Al(1) bond distances ranging from 2.67-2.98 Å. There are a spread of Os(1)-Al(2) bond distances ranging from 2.67-2.98 Å. There is one shorter (2.28 Å) and one longer (2.83 Å) Os(1)-B(1) bond length. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 9-coordinate geometry to four equivalent Os(1), one Al(2), and four equivalent B(1) atoms. The Al(1)-Al(2) bond length is 1.55 Å. There are a spread of Al(1)-B(1) bond distances ranging from 2.05-2.44 Å. In the second Al site, Al(2) is bonded in a 9-coordinate geometry to four equivalent Os(1), one Al(1), and four equivalent B(1) atoms. There are a spread of Al(2)-B(1) bond distances ranging from 2.25-2.61 Å. B(1) is bonded in a 10-coordinate geometry to two equivalent Os(1), four equivalent Al(1), and four equivalent Al(2) atoms.