data_AlAsRh2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.01
_cell_length_b   3.01
_cell_length_c   6.46
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   AlAsRh2
_chemical_formula_sum   'Al1 As1 Rh2'
_cell_volume   58.46
_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
  As  As1  1  0.0  0.0  0.23  1.0
  Rh  Rh2  1  0.5  0.5  0.95  1.0
  Rh  Rh3  1  0.5  0.5  0.51  1.0

data_AlAsRh2
_symmetry_space_group_name_H-M   P4mm
_cell_length_a   3.01
_cell_length_b   3.01
_cell_length_c   6.46
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   99
_chemical_formula_structural   AlAsRh2
_chemical_formula_sum   'Al1 As1 Rh2'
_cell_volume   58.46
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-y, x, z'
  3  '-x, -y, z'
  4  'y, -x, z'
  5  '-x, y, z'
  6  'y, x, z'
  7  'x, -y, z'
  8  '-y, -x, 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
  As  As1  1  0.0  0.0  0.23  1.0
  Rh  Rh2  1  0.5  0.5  0.51  1.0
  Rh  Rh3  1  0.5  0.5  0.95  1.0

Al As Rh Rh
Al As Rh Rh 0 1 o o o 0 2 o o - 0 2 o - - 0 2 - o - 0 2 - - - 1 3 o o o 1 3 o - o 1 3 - o o 1 3 - - o 2 3 o o o 3 3 + o o 3 3 o + o 
Rh2AlAs crystallizes in the monoclinic Cm space group. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a distorted square co-planar geometry to one Rh(2) and four equivalent Al(1) atoms. The Rh(1)-Rh(2) bond length is 2.83 Å. There are a spread of Rh(1)-Al(1) bond distances ranging from 2.13-2.17 Å. In the second Rh site, Rh(2) is bonded in a 9-coordinate geometry to one Rh(1), four equivalent Rh(2), and four equivalent As(1) atoms. All Rh(2)-Rh(2) bond lengths are 3.01 Å. There are a spread of Rh(2)-As(1) bond distances ranging from 2.78-2.81 Å. Al(1) is bonded to four equivalent Rh(1) and one As(1) atom to form a mixture of distorted corner and edge-sharing AlAsRh4 square pyramids. The Al(1)-As(1) bond length is 1.50 Å. As(1) is bonded in a single-bond geometry to four equivalent Rh(2) and one Al(1) atom.