data_Al2Rh
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.06
_cell_length_b   6.06
_cell_length_c   4.96
_cell_angle_alpha   97.18
_cell_angle_beta   97.18
_cell_angle_gamma   83.79
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Al2Rh
_chemical_formula_sum   'Al8 Rh4'
_cell_volume   178.23
_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  0.16  0.56  0.3  1.0
  Al  Al1  1  0.49  0.34  0.49  1.0
  Al  Al2  1  0.58  0.44  0.85  1.0
  Al  Al3  1  0.61  0.56  0.03  1.0
  Al  Al4  1  0.69  0.66  0.4  1.0
  Al  Al5  1  0.02  0.44  0.59  1.0
  Al  Al6  1  0.07  0.66  0.93  1.0
  Al  Al7  1  0.11  0.34  0.96  1.0
  Rh  Rh8  1  0.78  0.97  0.88  1.0
  Rh  Rh9  1  0.37  0.03  0.33  1.0
  Rh  Rh10  1  0.82  0.97  0.56  1.0
  Rh  Rh11  1  0.4  0.03  0.01  1.0

data_Al2Rh
_symmetry_space_group_name_H-M   P-1
_cell_length_a   4.96
_cell_length_b   6.06
_cell_length_c   6.06
_cell_angle_alpha   83.79
_cell_angle_beta   82.82
_cell_angle_gamma   82.82
_symmetry_Int_Tables_number   2
_chemical_formula_structural   Al2Rh
_chemical_formula_sum   'Al8 Rh4'
_cell_volume   178.23
_cell_formula_units_Z   4
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-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  2  0.04  0.1  0.66  1.0
  Al  Al1  2  0.15  0.57  0.56  1.0
  Al  Al2  2  0.41  0.02  0.56  1.0
  Al  Al3  2  0.49  0.52  0.34  1.0
  Rh  Rh4  2  0.12  0.77  0.03  1.0
  Rh  Rh5  2  0.44  0.81  0.03  1.0

Al Al Al Al Al Al Al Al Rh Rh Rh Rh
Al Al Al Al Al Al Al Al Rh Rh Rh Rh 0 7 o o - 0 5 o o o 0 6 o o - 1 9 o o o 1 2 o o o 2 3 o o + 3 4 o o o 4 10 o o o 5 7 o o o 5 6 o o o 6 7 o o o 8 10 o o o 9 11 o o o 
RhAl2 crystallizes in the triclinic P-1 space group. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a distorted L-shaped geometry to one Rh(2), one Al(4), and two equivalent Al(3) atoms. The Rh(1)-Rh(2) bond length is 1.62 Å. The Rh(1)-Al(4) bond length is 2.43 Å. Both Rh(1)-Al(3) bond lengths are 3.01 Å. In the second Rh site, Rh(2) is bonded in a 2-coordinate geometry to one Rh(1), one Al(1), and one Al(2) atom. The Rh(2)-Al(1) bond length is 3.23 Å. The Rh(2)-Al(2) bond length is 2.10 Å. There are four inequivalent Al sites. In the first Al site, Al(1) is bonded in a 5-coordinate geometry to one Rh(2), one Al(1), one Al(2), and two equivalent Al(4) atoms. The Al(1)-Al(1) bond length is 1.99 Å. The Al(1)-Al(2) bond length is 2.44 Å. There is one shorter (1.99 Å) and one longer (2.04 Å) Al(1)-Al(4) bond length. In the second Al site, Al(2) is bonded in a 1-coordinate geometry to one Rh(2), one Al(1), and one Al(3) atom. The Al(2)-Al(3) bond length is 1.88 Å. In the third Al site, Al(3) is bonded in a 4-coordinate geometry to two equivalent Rh(1), one Al(2), and one Al(3) atom. The Al(3)-Al(3) bond length is 1.08 Å. In the fourth Al site, Al(4) is bonded in a 1-coordinate geometry to one Rh(1) and two equivalent Al(1) atoms.