data_Na2AlRh
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.56
_cell_length_b   5.56
_cell_length_c   3.0
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   126.02
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2AlRh
_chemical_formula_sum   'Na2 Al1 Rh1'
_cell_volume   75.09
_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
  Na  Na1  1  0.26  0.48  0.5  1.0
  Na  Na2  1  0.26  0.52  0.5  1.0
  Al  Al0  1  0.0  0.0  0.0  1.0
  Rh  Rh3  1  0.52  0.0  0.0  1.0

data_Na2AlRh
_symmetry_space_group_name_H-M   Pm
_cell_length_a   5.05
_cell_length_b   3.0
_cell_length_c   5.56
_cell_angle_alpha   90.0
_cell_angle_beta   116.99
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   6
_chemical_formula_structural   Na2AlRh
_chemical_formula_sum   'Na2 Al1 Rh1'
_cell_volume   75.09
_cell_formula_units_Z   1
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
  Na  Na0  1  0.48  0.5  0.22  1.0
  Na  Na1  1  0.52  0.5  0.26  1.0
  Al  Al2  1  0.0  0.0  0.0  1.0
  Rh  Rh3  1  0.0  0.0  0.48  1.0

Na Na Al Rh
Na2RhAl crystallizes in the triclinic P1 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a distorted single-bond geometry to one Na(2) and two equivalent Al(1) atoms. The Na(1)-Na(2) bond length is 0.26 Å. Both Na(1)-Al(1) bond lengths are 2.62 Å. In the second Na site, Na(2) is bonded in a 3-coordinate geometry to one Na(1) and two equivalent Rh(1) atoms. Both Na(2)-Rh(1) bond lengths are 2.62 Å. Rh(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Na(2) and two equivalent Al(1) atoms. There is one shorter (2.65 Å) and one longer (2.91 Å) Rh(1)-Al(1) bond length. Al(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Na(1) and two equivalent Rh(1) atoms.