data_AlSi2Rh
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.47
_cell_length_b   4.47
_cell_length_c   4.38
_cell_angle_alpha   95.24
_cell_angle_beta   95.24
_cell_angle_gamma   40.8
_symmetry_Int_Tables_number   1
_chemical_formula_structural   AlSi2Rh
_chemical_formula_sum   'Al1 Si2 Rh1'
_cell_volume   56.97
_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  0.0  0.0  0.0  1.0
  Si  Si2  1  0.24  0.0  0.14  1.0
  Si  Si3  1  0.72  0.0  0.22  1.0
  Rh  Rh1  1  0.98  0.0  0.18  1.0

data_AlSi2Rh
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.12
_cell_length_b   4.38
_cell_length_c   4.47
_cell_angle_alpha   95.24
_cell_angle_beta   110.4
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   AlSi2Rh
_chemical_formula_sum   'Al1 Si2 Rh1'
_cell_volume   56.97
_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  0.0  0.0  0.0  1.0
  Si  Si1  1  0.0  0.14  0.24  1.0
  Si  Si2  1  0.0  0.22  0.72  1.0
  Rh  Rh3  1  0.0  0.18  0.98  1.0

Al Si Si Rh
Al Si Si Rh 0 3 - o o 0 1 o o o 1 3 - o o 2 3 o o o 
RhAlSi2 crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one RhAlSi2 cluster. Rh(1) is bonded in a distorted single-bond geometry to one Al(1), one Si(1), and one Si(2) atom. The Rh(1)-Al(1) bond length is 0.80 Å. The Rh(1)-Si(1) bond length is 1.18 Å. The Rh(1)-Si(2) bond length is 1.18 Å. Al(1) is bonded in a single-bond geometry to one Rh(1) and one Si(1) atom. The Al(1)-Si(1) bond length is 1.17 Å. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 2-coordinate geometry to one Rh(1) and one Al(1) atom. In the second Si site, Si(2) is bonded in a single-bond geometry to one Rh(1) atom.