The material described by URhAl crystallizes in the hexagonal P-62m space group. U(1) is bonded in a 5-coordinate geometry to one Rh(1) and four equivalent Rh(2) atoms. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a 9-coordinate geometry to three equivalent U(1) and six equivalent Al(1) atoms. In the second Rh site, Rh(2) is bonded in a 9-coordinate geometry to six equivalent U(1) and three equivalent Al(1) atoms. Al(1) is bonded to two equivalent Rh(1) and two equivalent Rh(2) atoms to form a mixture of distorted edge and corner-sharing AlRh4 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_UAlRh
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.820
_cell_length_b   6.820
_cell_length_c   4.182
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   168.429
_cell_formula_units_Z   3
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  0.574  0.000  0.500  1.0
  U  U1  1  0.426  0.426  0.500  1.0
  U  U2  1  0.000  0.574  0.500  1.0
  Al  Al3  1  0.235  0.000  0.000  1.0
  Al  Al4  1  0.765  0.765  0.000  1.0
  Al  Al5  1  0.000  0.235  0.000  1.0
  Rh  Rh6  1  0.000  0.000  0.500  1.0
  Rh  Rh7  1  0.333  0.667  0.000  1.0
  Rh  Rh8  1  0.667  0.333  0.000  1.0
[/CIF]
.
The material described by URhAl crystallizes in the hexagonal P-62m space group. U(1) is bonded in a 5-coordinate geometry to one Rh(1) and four equivalent Rh(2) atoms. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a 9-coordinate geometry to three equivalent U(1) and six equivalent Al(1) atoms. In the second Rh site, Rh(2) is bonded in a 9-coordinate geometry to six equivalent U(1) and three equivalent Al(1) atoms. Al(1) is bonded to two equivalent Rh(1) and two equivalent Rh(2) atoms to form a mixture of distorted edge and corner-sharing AlRh4 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_UAlRh
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.820
_cell_length_b   6.820
_cell_length_c   4.182
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   168.429
_cell_formula_units_Z   3
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  0.574  0.000  0.500  1.0
  U  U1  1  0.426  0.426  0.500  1.0
  U  U2  1  0.000  0.574  0.500  1.0
  Al  Al3  1  0.235  0.000  0.000  1.0
  Al  Al4  1  0.765  0.765  0.000  1.0
  Al  Al5  1  0.000  0.235  0.000  1.0
  Rh  Rh6  1  0.000  0.000  0.500  1.0
  Rh  Rh7  1  0.333  0.667  0.000  1.0
  Rh  Rh8  1  0.667  0.333  0.000  1.0
[/CIF]
.