data_NbAg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.0
_cell_length_b   5.0
_cell_length_c   2.75
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NbAg2
_chemical_formula_sum   'Nb1 Ag2'
_cell_volume   68.81
_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  Nb2  1  0.0  0.0  0.0  1.0
  Ag  Ag0  1  0.0  0.5  0.38  1.0
  Ag  Ag1  1  0.5  0.0  0.38  1.0

data_NbAg2
_symmetry_space_group_name_H-M   P4mm
_cell_length_a   5.0
_cell_length_b   5.0
_cell_length_c   2.75
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   99
_chemical_formula_structural   NbAg2
_chemical_formula_sum   'Nb1 Ag2'
_cell_volume   68.81
_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
  Nb  Nb0  1  0.0  0.0  0.0  1.0
  Ag  Ag1  2  0.0  0.5  0.38  1.0

Nb Ag Ag
NbAg2 crystallizes in the tetragonal P4mm space group. Nb(1) is bonded in a 10-coordinate geometry to two equivalent Nb(1) and eight equivalent Ag(1) atoms. Both Nb(1)-Nb(1) bond lengths are 2.75 Å. There are four shorter (2.71 Å) and four longer (3.03 Å) Nb(1)-Ag(1) bond lengths. Ag(1) is bonded in a 6-coordinate geometry to four equivalent Nb(1) and two equivalent Ag(1) atoms. Both Ag(1)-Ag(1) bond lengths are 2.75 Å.