The structure described by U2Co3Al crystallizes in the hexagonal P6_3/mmc space group. U(1) is bonded in a 16-coordinate geometry to four equivalent U(1), nine equivalent Co(1), and three equivalent Al(1) atoms. Co(1) is bonded to six equivalent U(1), four equivalent Co(1), and two equivalent Al(1) atoms to form distorted CoU6Al2Co4 cuboctahedra that share corners with four equivalent Al(1)U6Co6 cuboctahedra, corners with fourteen equivalent Co(1)U6Al2Co4 cuboctahedra, edges with six equivalent Co(1)U6Al2Co4 cuboctahedra, faces with six equivalent Al(1)U6Co6 cuboctahedra, and faces with twelve equivalent Co(1)U6Al2Co4 cuboctahedra. Al(1) is bonded to six equivalent U(1) and six equivalent Co(1) atoms to form distorted AlU6Co6 cuboctahedra that share corners with twelve equivalent Co(1)U6Al2Co4 cuboctahedra, edges with six equivalent Al(1)U6Co6 cuboctahedra, faces with two equivalent Al(1)U6Co6 cuboctahedra, and faces with eighteen equivalent Co(1)U6Al2Co4 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_U2AlCo3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.151
_cell_length_b   5.151
_cell_length_c   7.632
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   175.375
_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  0.070  1.0
  U  U1  1  0.667  0.333  0.570  1.0
  U  U2  1  0.667  0.333  0.930  1.0
  U  U3  1  0.333  0.667  0.430  1.0
  Al  Al4  1  0.000  0.000  0.000  1.0
  Al  Al5  1  0.000  0.000  0.500  1.0
  Co  Co6  1  0.830  0.660  0.250  1.0
  Co  Co7  1  0.170  0.830  0.750  1.0
  Co  Co8  1  0.660  0.830  0.750  1.0
  Co  Co9  1  0.340  0.170  0.250  1.0
  Co  Co10  1  0.830  0.170  0.250  1.0
  Co  Co11  1  0.170  0.340  0.750  1.0
[/CIF]
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The structure described by U2Co3Al crystallizes in the hexagonal P6_3/mmc space group. U(1) is bonded in a 16-coordinate geometry to four equivalent U(1), nine equivalent Co(1), and three equivalent Al(1) atoms. Co(1) is bonded to six equivalent U(1), four equivalent Co(1), and two equivalent Al(1) atoms to form distorted CoU6Al2Co4 cuboctahedra that share corners with four equivalent Al(1)U6Co6 cuboctahedra, corners with fourteen equivalent Co(1)U6Al2Co4 cuboctahedra, edges with six equivalent Co(1)U6Al2Co4 cuboctahedra, faces with six equivalent Al(1)U6Co6 cuboctahedra, and faces with twelve equivalent Co(1)U6Al2Co4 cuboctahedra. Al(1) is bonded to six equivalent U(1) and six equivalent Co(1) atoms to form distorted AlU6Co6 cuboctahedra that share corners with twelve equivalent Co(1)U6Al2Co4 cuboctahedra, edges with six equivalent Al(1)U6Co6 cuboctahedra, faces with two equivalent Al(1)U6Co6 cuboctahedra, and faces with eighteen equivalent Co(1)U6Al2Co4 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_U2AlCo3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.151
_cell_length_b   5.151
_cell_length_c   7.632
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   175.375
_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  0.070  1.0
  U  U1  1  0.667  0.333  0.570  1.0
  U  U2  1  0.667  0.333  0.930  1.0
  U  U3  1  0.333  0.667  0.430  1.0
  Al  Al4  1  0.000  0.000  0.000  1.0
  Al  Al5  1  0.000  0.000  0.500  1.0
  Co  Co6  1  0.830  0.660  0.250  1.0
  Co  Co7  1  0.170  0.830  0.750  1.0
  Co  Co8  1  0.660  0.830  0.750  1.0
  Co  Co9  1  0.340  0.170  0.250  1.0
  Co  Co10  1  0.830  0.170  0.250  1.0
  Co  Co11  1  0.170  0.340  0.750  1.0
[/CIF]
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