The structure described by U2OsAl3 crystallizes in the hexagonal P6_3/mmc space group. U(1) is bonded in a 16-coordinate geometry to four equivalent U(1), three equivalent Os(1), and nine equivalent Al(1) atoms. Os(1) is bonded to six equivalent U(1) and six equivalent Al(1) atoms to form OsU6Al6 cuboctahedra that share corners with twelve equivalent Al(1)U6Al4Os2 cuboctahedra, edges with six equivalent Os(1)U6Al6 cuboctahedra, faces with two equivalent Os(1)U6Al6 cuboctahedra, and faces with eighteen equivalent Al(1)U6Al4Os2 cuboctahedra. Al(1) is bonded to six equivalent U(1), two equivalent Os(1), and four equivalent Al(1) atoms to form distorted AlU6Al4Os2 cuboctahedra that share corners with four equivalent Os(1)U6Al6 cuboctahedra, corners with fourteen equivalent Al(1)U6Al4Os2 cuboctahedra, edges with six equivalent Al(1)U6Al4Os2 cuboctahedra, faces with six equivalent Os(1)U6Al6 cuboctahedra, and faces with twelve equivalent Al(1)U6Al4Os2 cuboctahedra. is represented by the CIF file [CIF]
data_U2Al3Os
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.343
_cell_length_b   5.343
_cell_length_c   8.893
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   219.888
_cell_formula_units_Z   2
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
  U  U0  1  0.333  0.667  0.052  1.0
  U  U1  1  0.667  0.333  0.552  1.0
  U  U2  1  0.667  0.333  0.948  1.0
  U  U3  1  0.333  0.667  0.448  1.0
  Al  Al4  1  0.834  0.669  0.250  1.0
  Al  Al5  1  0.166  0.834  0.750  1.0
  Al  Al6  1  0.669  0.834  0.750  1.0
  Al  Al7  1  0.331  0.166  0.250  1.0
  Al  Al8  1  0.834  0.166  0.250  1.0
  Al  Al9  1  0.166  0.331  0.750  1.0
  Os  Os10  1  0.000  0.000  0.000  1.0
  Os  Os11  1  0.000  0.000  0.500  1.0
[/CIF]
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The structure described by U2OsAl3 crystallizes in the hexagonal P6_3/mmc space group. U(1) is bonded in a 16-coordinate geometry to four equivalent U(1), three equivalent Os(1), and nine equivalent Al(1) atoms. Os(1) is bonded to six equivalent U(1) and six equivalent Al(1) atoms to form OsU6Al6 cuboctahedra that share corners with twelve equivalent Al(1)U6Al4Os2 cuboctahedra, edges with six equivalent Os(1)U6Al6 cuboctahedra, faces with two equivalent Os(1)U6Al6 cuboctahedra, and faces with eighteen equivalent Al(1)U6Al4Os2 cuboctahedra. Al(1) is bonded to six equivalent U(1), two equivalent Os(1), and four equivalent Al(1) atoms to form distorted AlU6Al4Os2 cuboctahedra that share corners with four equivalent Os(1)U6Al6 cuboctahedra, corners with fourteen equivalent Al(1)U6Al4Os2 cuboctahedra, edges with six equivalent Al(1)U6Al4Os2 cuboctahedra, faces with six equivalent Os(1)U6Al6 cuboctahedra, and faces with twelve equivalent Al(1)U6Al4Os2 cuboctahedra. is represented by the CIF file [CIF]
data_U2Al3Os
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.343
_cell_length_b   5.343
_cell_length_c   8.893
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   219.888
_cell_formula_units_Z   2
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
  U  U0  1  0.333  0.667  0.052  1.0
  U  U1  1  0.667  0.333  0.552  1.0
  U  U2  1  0.667  0.333  0.948  1.0
  U  U3  1  0.333  0.667  0.448  1.0
  Al  Al4  1  0.834  0.669  0.250  1.0
  Al  Al5  1  0.166  0.834  0.750  1.0
  Al  Al6  1  0.669  0.834  0.750  1.0
  Al  Al7  1  0.331  0.166  0.250  1.0
  Al  Al8  1  0.834  0.166  0.250  1.0
  Al  Al9  1  0.166  0.331  0.750  1.0
  Os  Os10  1  0.000  0.000  0.000  1.0
  Os  Os11  1  0.000  0.000  0.500  1.0
[/CIF]
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