data_Al4Ag5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.46
_cell_length_b   6.46
_cell_length_c   6.46
_cell_angle_alpha   95.63
_cell_angle_beta   95.63
_cell_angle_gamma   143.48
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Al4Ag5
_chemical_formula_sum   'Al4 Ag5'
_cell_volume   152.28
_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  Al5  1  0.0  0.76  0.0  1.0
  Al  Al6  1  0.0  0.92  0.0  1.0
  Al  Al7  1  0.92  0.0  0.0  1.0
  Al  Al8  1  0.76  0.0  0.0  1.0
  Ag  Ag0  1  0.0  0.0  0.0  1.0
  Ag  Ag1  1  0.53  0.47  0.02  1.0
  Ag  Ag2  1  0.47  0.53  0.02  1.0
  Ag  Ag3  1  0.86  0.86  0.0  1.0
  Ag  Ag4  1  0.47  0.47  0.02  1.0

data_Al4Ag5
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.05
_cell_length_b   12.27
_cell_length_c   6.46
_cell_angle_alpha   90.0
_cell_angle_beta   108.26
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Al4Ag5
_chemical_formula_sum   'Al8 Ag10'
_cell_volume   304.57
_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  4  0.04  0.04  -0.0  1.0
  Al  Al1  4  0.12  0.12  -0.0  1.0
  Ag  Ag2  4  0.0  0.47  0.98  1.0
  Ag  Ag3  2  0.0  0.0  0.0  1.0
  Ag  Ag4  2  0.03  0.5  0.98  1.0
  Ag  Ag5  2  0.14  0.0  -0.0  1.0

Al Al Al Al Ag Ag Ag Ag Ag
Al Al Al Al Ag Ag Ag Ag Ag 0 1 o o o 1 7 - o o 1 4 o + o 2 7 o - o 2 4 + o o 2 3 o o o 4 7 - - o 5 8 o o o 6 8 o o o 
Ag5Al4 is Indium-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Ag5Al4 clusters. There are four inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 3-coordinate geometry to one Ag(3) and two equivalent Al(2) atoms. The Ag(1)-Ag(3) bond length is 0.55 Å. Both Ag(1)-Al(2) bond lengths are 0.52 Å. In the second Ag site, Ag(2) is bonded in a single-bond geometry to one Ag(4) and one Al(1) atom. The Ag(2)-Ag(4) bond length is 0.35 Å. The Ag(2)-Al(1) bond length is 1.97 Å. In the third Ag site, Ag(3) is bonded in a 3-coordinate geometry to one Ag(1) and two equivalent Al(2) atoms. Both Ag(3)-Al(2) bond lengths are 0.63 Å. In the fourth Ag site, Ag(4) is bonded in a bent 150 degrees geometry to two equivalent Ag(2) atoms. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 2-coordinate geometry to one Ag(2) and one Al(2) atom. The Al(1)-Al(2) bond length is 1.06 Å. In the second Al site, Al(2) is bonded in a 2-coordinate geometry to one Ag(1), one Ag(3), and one Al(1) atom.