data_BeAl2Os
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.13
_cell_length_b   3.13
_cell_length_c   5.37
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   BeAl2Os
_chemical_formula_sum   'Be1 Al2 Os1'
_cell_volume   52.71
_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
  Be  Be2  1  0.0  0.0  0.78  1.0
  Al  Al0  1  0.0  0.0  0.25  1.0
  Al  Al1  1  0.57  0.57  0.45  1.0
  Os  Os3  1  0.57  0.57  0.94  1.0

data_BeAl2Os
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.43
_cell_length_b   4.43
_cell_length_c   5.37
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   BeAl2Os
_chemical_formula_sum   'Be2 Al4 Os2'
_cell_volume   105.43
_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
  Be  Be0  2  0.0  0.0  0.78  1.0
  Al  Al1  2  0.0  0.0  0.25  1.0
  Al  Al2  2  0.07  0.5  0.45  1.0
  Os  Os3  2  0.07  0.5  0.94  1.0

Be Al Al Os
BeOsAl2 crystallizes in the monoclinic Cm space group. Be(1) is bonded in a 4-coordinate geometry to four equivalent Os(1), two equivalent Al(1), and three equivalent Al(2) atoms. There are a spread of Be(1)-Os(1) bond distances ranging from 2.12-2.67 Å. There is one shorter (2.52 Å) and one longer (2.85 Å) Be(1)-Al(1) bond length. There is one shorter (2.59 Å) and two longer (2.84 Å) Be(1)-Al(2) bond lengths. Os(1) is bonded in a 10-coordinate geometry to four equivalent Be(1), two equivalent Al(2), and four equivalent Al(1) atoms. There is one shorter (2.64 Å) and one longer (2.72 Å) Os(1)-Al(2) bond length. There are a spread of Os(1)-Al(1) bond distances ranging from 2.51-2.99 Å. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 10-coordinate geometry to two equivalent Be(1), four equivalent Os(1), and four equivalent Al(2) atoms. There are a spread of Al(1)-Al(2) bond distances ranging from 2.21-2.75 Å. In the second Al site, Al(2) is bonded in a 9-coordinate geometry to three equivalent Be(1), two equivalent Os(1), and four equivalent Al(1) atoms.