data_Al2SiRh
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.82
_cell_length_b   2.82
_cell_length_c   7.46
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Al2SiRh
_chemical_formula_sum   'Al2 Si1 Rh1'
_cell_volume   59.52
_cell_formula_units_Z   1
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  0.41  0.41  0.07  1.0
  Al  Al1  1  0.41  0.41  0.38  1.0
  Si  Si3  1  0.0  0.0  0.0  1.0
  Rh  Rh2  1  0.0  0.0  0.73  1.0

data_Al2SiRh
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.0
_cell_length_b   4.0
_cell_length_c   7.46
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Al2SiRh
_chemical_formula_sum   'Al4 Si2 Rh2'
_cell_volume   119.03
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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  0.41  0.0  0.07  1.0
  Al  Al1  2  0.41  0.0  0.38  1.0
  Si  Si2  2  0.0  0.0  0.0  1.0
  Rh  Rh3  2  0.0  0.0  0.73  1.0

Al Al Si Rh
RhAl2Si is Potassium thiocyanate-derived structured and crystallizes in the monoclinic Cm space group. Rh(1) is bonded in a distorted single-bond geometry to three equivalent Al(2) and one Si(1) atom. There is one shorter (3.06 Å) and two longer (3.28 Å) Rh(1)-Al(2) bond lengths. The Rh(1)-Si(1) bond length is 2.02 Å. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 5-coordinate geometry to one Al(2) and four equivalent Si(1) atoms. The Al(1)-Al(2) bond length is 2.30 Å. There are a spread of Al(1)-Si(1) bond distances ranging from 1.74-2.41 Å. In the second Al site, Al(2) is bonded in a 8-coordinate geometry to three equivalent Rh(1), one Al(1), and four equivalent Al(2) atoms. All Al(2)-Al(2) bond lengths are 2.82 Å. Si(1) is bonded in a 5-coordinate geometry to one Rh(1) and four equivalent Al(1) atoms.