data_NbAg4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.33
_cell_length_b   7.33
_cell_length_c   7.33
_cell_angle_alpha   150.09
_cell_angle_beta   150.09
_cell_angle_gamma   42.81
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NbAg4
_chemical_formula_sum   'Nb1 Ag4'
_cell_volume   97.7
_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
  Nb  Nb4  1  0.0  0.0  0.0  1.0
  Ag  Ag0  1  0.89  0.0  0.41  1.0
  Ag  Ag1  1  0.0  0.0  0.5  1.0
  Ag  Ag2  1  0.0  0.0  0.15  1.0
  Ag  Ag3  1  0.0  0.89  0.41  1.0

data_NbAg4
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.35
_cell_length_b   5.35
_cell_length_c   7.33
_cell_angle_alpha   90.0
_cell_angle_beta   111.4
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   NbAg4
_chemical_formula_sum   'Nb2 Ag8'
_cell_volume   195.4
_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
  Nb  Nb0  2  0.0  0.0  0.0  1.0
  Ag  Ag1  4  0.45  0.45  0.48  1.0
  Ag  Ag2  2  0.0  0.0  0.5  1.0
  Ag  Ag3  2  0.0  0.0  0.85  1.0

Nb Ag Ag Ag Ag
AgNb1(Ag)3 crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Ag clusters and two AgNb1 clusters. In each Ag cluster, there are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a single-bond geometry to one Ag(2) atom. The Ag(1)-Ag(2) bond length is 0.40 Å. In the second Ag site, Ag(2) is bonded in an L-shaped geometry to two equivalent Ag(1) atoms. In each AgNb1 cluster, Nb(1) is bonded in a single-bond geometry to one Ag(3) atom. The Nb(1)-Ag(3) bond length is 1.08 Å. Ag(3) is bonded in a single-bond geometry to one Nb(1) atom.