data_Na2AlAg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.68
_cell_length_b   10.68
_cell_length_c   10.68
_cell_angle_alpha   16.56
_cell_angle_beta   16.56
_cell_angle_gamma   16.56
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2AlAg
_chemical_formula_sum   'Na2 Al1 Ag1'
_cell_volume   86.34
_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  Na2  1  0.0  0.0  0.76  1.0
  Na  Na3  1  0.0  0.0  0.84  1.0
  Al  Al1  1  0.0  0.0  0.0  1.0
  Ag  Ag0  1  0.0  0.0  0.8  1.0

data_Na2AlAg
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.33
_cell_length_b   3.08
_cell_length_c   10.68
_cell_angle_alpha   90.0
_cell_angle_beta   99.57
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Na2AlAg
_chemical_formula_sum   'Na4 Al2 Ag2'
_cell_volume   172.68
_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
  Na  Na0  2  0.0  0.0  0.16  1.0
  Na  Na1  2  0.0  0.0  0.24  1.0
  Al  Al2  2  0.0  0.0  0.0  1.0
  Ag  Ag3  2  0.0  0.0  0.2  1.0

Na Na Al Ag
Na Na Al Ag 0 3 o o o 1 3 o o o 1 2 o o + 
Na2AgAl is Cyanogen Chloride-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Na2AgAl clusters. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a single-bond geometry to one Ag(1) atom. The Na(1)-Ag(1) bond length is 0.41 Å. In the second Na site, Na(2) is bonded in a distorted single-bond geometry to one Ag(1) and one Al(1) atom. The Na(2)-Ag(1) bond length is 0.41 Å. The Na(2)-Al(1) bond length is 1.75 Å. Ag(1) is bonded in a linear geometry to one Na(1) and one Na(2) atom. Al(1) is bonded in a single-bond geometry to one Na(2) atom.