data_AlOs
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.85
_cell_length_b   4.85
_cell_length_c   4.85
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   AlOs
_chemical_formula_sum   'Al4 Os4'
_cell_volume   114.2
_cell_formula_units_Z   4
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  0.47  0.9  0.38  1.0
  Al  Al1  1  0.95  0.95  0.95  1.0
  Al  Al2  1  0.38  0.47  0.9  1.0
  Al  Al3  1  0.9  0.38  0.47  1.0
  Os  Os4  1  0.89  0.32  0.96  1.0
  Os  Os5  1  0.53  0.53  0.53  1.0
  Os  Os6  1  0.96  0.89  0.32  1.0
  Os  Os7  1  0.32  0.96  0.89  1.0

data_AlOs
_symmetry_space_group_name_H-M   R3
_cell_length_a   6.86
_cell_length_b   6.86
_cell_length_c   8.4
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   146
_chemical_formula_structural   AlOs
_chemical_formula_sum   'Al12 Os12'
_cell_volume   342.61
_cell_formula_units_Z   12
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  'x+1/3, y+2/3, z+2/3'
  5  '-y+1/3, x-y+2/3, z+2/3'
  6  '-x+y+1/3, -x+2/3, z+2/3'
  7  'x+2/3, y+1/3, z+1/3'
  8  '-y+2/3, x-y+1/3, z+1/3'
  9  '-x+y+2/3, -x+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
  Al  Al0  9  0.13  0.35  0.25  1.0
  Al  Al1  3  0.0  0.0  0.95  1.0
  Os  Os2  9  0.17  0.77  0.72  1.0
  Os  Os3  3  0.0  0.0  0.53  1.0

Al Al Al Al Os Os Os Os
OsAl crystallizes in the trigonal R3 space group. There are two inequivalent Os sites. In the first Os site, Os(1) is bonded in a 1-coordinate geometry to one Al(2) and four equivalent Al(1) atoms. The Os(1)-Al(2) bond length is 1.80 Å. There are a spread of Os(1)-Al(1) bond distances ranging from 2.38-2.61 Å. In the second Os site, Os(2) is bonded in a distorted trigonal non-coplanar geometry to three equivalent Al(1) atoms. All Os(2)-Al(1) bond lengths are 1.94 Å. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 5-coordinate geometry to one Os(2) and four equivalent Os(1) atoms. In the second Al site, Al(2) is bonded in a 3-coordinate geometry to three equivalent Os(1) atoms.